How To Solder On Printed Circuit Boards

mwcms on January 27, 2023

Solder is a material that manufacturers use in the printed circuit board assembly process. This material can join soft metals such as gold, copper, and silver together. Copper is the common material in the printed circuit board assembly or any electronic item.

Most commonly, manufacturers will use eutectic solder, a combination of tin and lead. This is about 63% and 37% lead, and it comes with a formulation with a minimum melting point for the combination of metals.

Properties

Different solders come with different melting points and ranges of temperatures where solid and liquid tend to co-exist together. You can also form a pasty substance as it cools, and you can find that it is very flexible. The flexible property or ductility allows the metals that join it to interpenetrate once you melt it.

It is a dense and heavy material because it has a high lead content. It also comes in several different gauges and wire diameters. For surface mount devices, a very fine one is more useful. You can also find lead-free, which comes with the formulation of tin, silver, and copper.

This does have a melting point, and you can use this commonly with electronics that use low-temperature soldering irons. Lead-free has a high melting point, which is why it can be difficult to work with. This material is also relatively new, and most people will be unfamiliar with its properties.

Printed Circuit Board Soldering

A printed circuit board holds electronic components and provides a mechanical means of holding them in a space where they connect electrically. A printed circuit board contains different resistors, active circuits, and capacitors.

The circuit board holds them together collectively and consists of several layers. The first layer you see is a green layer, a polymer called LPI. This photo image-able polymer can go down as a liquid and dry to form a solid layer. The green layer is necessary to prevent it from crossing over and shorting traces that should not connect.

Basic Technique

If you are manually soldering components to a printed circuit board, you must adhere to the basic technique. There are two different types of soldering iron. One has a station that controls and adjusts the desired target temperature. The other melts electronics at a fixed temperature, which you can use similarly.

Soldering iron heat up and melt the solder on the circuit boards. When it melts and cools on the printed board surface, it cools and solidifies, fusing to the surface of the metal at a molecular level and enabling electrical conductivity within the two metal platforms.

When soldering with an iron, you can also use flux, which helps it to flow, and also provides good contact by removing oxides on the surface of the metal. Although modern flux is not toxic, you should always use a fume extractor.

Two Different Connections

You can find two different types, surface mount and through hole. Surface mount connections require manufacturers to heat components in an oven with pre-applied. This allows it to melt and join to the board’s surface. Through-hole is when you push the components through the printed circuit board hole and solder them from the other side. The solder travels across the hole to make good contact.

Final Words

As you can see, this is an essential part of the printed circuit board assembly process. It is best to resort to a professional manufacturing unit to do a perfect job. The best soldering service will use top-notch technology for clean and precise solder.

Surface Mount Assembly vs. Electro- Mechanical Assembly

mwcms on January 18, 2023

Surface mount and electro-mechanical Assembly are two circuit board assembly procedures manufacturers commonly use. But which one is better? To find out the answer to this question, you have to first find out about both assembly procedures, how they differ from each other, and their similarities.

Surface Mount Assembly

SMT, or surface mount technology, allows manufacturers to create circuit boards. The alternative to this technology is through whole technology, which caters to a different design of circuit boards. Most circuit boards in a smartphone or any other electrical appliance nowadays include small miniature chips on top of a circuit board. Surface mount assembly is usually a semi-automated process that allows manufacturers to build circuit boards for various products.

This technique involves installing the components directly onto the surface of printed circuit boards to create electrical circuits. Every component or device is mounted on the circuit board using a solder mask. Production will be extremely fast if you use surface mount assembly. But, it also has a lot of disadvantages.

With components being incredibly miniature and circuits packed densely with multiple electrical components, testing and inspection can be problematic when assembling printed circuit boards using surface mount technology. However, with advanced technology and expertise, manufacturers can optimize testing.

Several steps are involved in producing printed surface boards utilizing surface mount assembly. The application of solder paste marks the beginning of the assembly procedure. The material that the electronic parts are installed on is this. Component placement begins once the solder mask has been applied to the board. Both physical labor and mechanical assistance are acceptable for this.

This procedure then advances to the reflow soldering stage, when all the extra solder is removed. After completing these procedures, the printed circuit boards surface mount assembly process is finished, and you may start the testing process.

Electromechanical Assembly

Machines and other automatic driving systems are crucial to electro-mechanical Assembly. Electronic items are made up of several components and connections. These parts may also include resistors, conductors, and capacitors—devices that modify the direction of electrical flow.

 

Since it creates a path for electricity to go to all components, the circuit board assembly is the engine behind most electronic devices. Components can mount on circuit boards in two different methods. And the through-hole method is the primary focus of most electro-mechanical assembly procedures.

SMT vs. Electro-mechanical assembly

The mounting process is the electro-mechanical assembly’s main difference when you compare it to surface mount technology. The electro-mechanical assembly uses through-hole technology. You can use both of these methods in a printed circuit board.

In the through-hole method, there are pre-drilled holes in the circuit board, and you have to push the components through them and solder them to secure them in place. On large-scale productions that use through-hole components, manufacturers use wave soldering.

This is where a circuit board moves through a solder wave tank and applies a strong bond to the board—a strong bond results in component placements that can withstand severe environmental stress and high heat.

Through-hole components are easier to change and replace for testing and prototyping applications that require manual adjustments. In the surface mount method, thousands of tiny components place directly on the PCB with the help of a flux paste. This reflow soldering method does not require pre-drilled holes, and components are typically smaller.

The Verdict

Electro-mechanical assembly can be costly and time-consuming, but it is reliable and durable for applications that undergo high stress. SMT assembly is ten times faster and more economical. On the other hand, SMT components can fit inside a circuit board at a higher volume. Overall, each technology can be favorable depending on the electrical appliance.

How Do You Define a PCB?

mwcms on December 15, 2022

This post will talk about one thing only: Printed Circuit Boards, or PCBs for short. You must know that the world of technology keeps expanding as new devices, gadgets, and equipment make their way into our lives. What keeps the electrical appliances and equipment running? Is there a core component without which your electrical device, like a smartphone, laptop, or vacuum cleaner, won’t work? Yes!

Printed Circuit Boards are the core components of many electrical devices. In technical terms, a PCB creates conductive pathways to connect and mechanically support electrical components. We won’t be talking in purely scientific and mathematical lingo – don’t worry! Let’s find out what a PCB refers to and what it does.

What Do You Define a PCB in Technical Terms?

Here’s how you define a Printed Circuit Board or PCB:

“A PCB forms the board base for connecting and supporting multiple electrical components using the surface mount technology to run electronic products.”

Have you ever accidentally cracked open your phone or even an electronic toy? Did you see a green electric board with numerous wires attached to different parts of the individual item? Well, that’s a PCB! It has socketed or open components that transfer electrical signals and conductive traces through conductive pathways to run an electronic product.

Like animal and plant cells require a nucleus at the center to function and coordinate other mechanisms, nearly every electronic product requires circuit boards. A more technical term for circuit boards is “printed circuit boards”. Many standard devices like laptops, smartphones, and even vacuum cleaners won’t work without it.

How Do Factories Make PCBs?

PCBs are electrical circuit boards in various shapes, sizes, and designs. Since they fit many electronic product categories, they are not the same. Factories are the production houses where electrical circuit boards get fused with electrical components to produce PCBs!

Every PCB is different yet vital to the functionality of the device it’s for. The most standard version is a plastic board covered with fiberglass. Having a non-conductive plastic board is essential to make a high-quality board. The manufacturers create small conductive pathways on that board to mount and connect multiple electrical components.

The conductive traces (pathways) assist components in passing electric signals through it. It contains numerous holes to fit each component. First, manufacturers add a soldering paste to the board, passing it through the “pick and place” technique where components are attached to it.

Second, it goes through the soldering process to permanently attach every component to the board. Then, the board goes through physical and functional inspection (testing phase) to ensure high-quality production. Finally, the factories receive test feedback and performance reports before readying them for supply to the market. 

What Happens When a PCB Corrupts or Malfunctions in a Device?

Printed Circuit Boards are the core components of electronic devices. So, when the board takes out or if it malfunctions, the device will probably stop functioning. Even if a single important component malfunctions on the board, the whole device could malfunction or stop working altogether.

Fixing it as soon as it gets damaged or malfunctions is the best approach, especially when it’s an essential household or personal device like a smartphone or laptop. There could be dozens of issues and reasons behind a PCB not functioning correctly, including:

  • Poor soldering
  • Low-quality soldering paste
  • Damage in the assembling process
  • Heat-up issues
  • Poor-quality components 

Conclusion

You will only have a limited range of electronic products if factories stop producing electrical products, mainly printed circuit boards. You can only imagine how far the effect of PCBs travels in our daily lives. PCBs are in numerous devices, from personal hygiene products to military equipment and navigational systems.

What are the Most Important Components of a PCB?

mwcms on November 29, 2022

Printed Circuit Boards feature the Surface Mount Technology these days. Therefore, components of a PCB tend to be a lot on a single board; sometimes, up to a hundred components at once! It’s worth knowing that PCBs or printed circuit boards are the core components of our essential electronic devices and equipment. Without PCBs, your phone won’t work.

While learning about PCBs, most readers find one topic very interesting. That topic relates to the different components that make up a PCB. In surface mount boards, dozens of electrical components are connected via conductive pathways. Let’s learn about some of those components below.

7 Most Important Components of a Printed Circuit Board (PCB)

PCBs contain a wide range of electrical components that perform different functions based on the host device. They’re vital for the functionality of a device like a laptop, washing machine, or calculator. The number and type of components can vary significantly based on the device and PCB type. However, the most common types of electrical components infused in a printed circuit board include:

  • Resistors
  • Transistors
  • Inductors
  • Capacitors
  • Transformers
  • Sensors
  • Diodes

If even one component stops working, the whole PCB shuts down. Thus, the device it belongs to will shut down as well. Here, we will discuss the crucial PCB components, what they do, and why they’re important.

  • Resistors

They’re among the most crucial components in nearly all types of printed circuit boards. They produce and transmit electric currents to cause a voltage that helps dissipate electric power as heat energy. Although resistors have the same purpose, they still come in a wide variety in terms of shape, size, and power. They’re basically based on the resistance value and are easy to identify using color codes.

  • Transistors

Think of a transistor as an amplifier that switches and regulates electronic signals in a printed circuit board. These electrical components also come in a wide variety, but the most typical transistor in use is the “bipolar transistor”. It has three pins that form (i) the base, (ii) the emitter, and (iii) the collector. 

  • Inductors

Inductors are quite similar to capacitors in printed circuit boards. They store a specific energy quantity in the form of magnetic fields right when an electric current passes through them. Their main purpose is to block electric signals in the board to prevent interference that could occur due to a connection with another electronic device or equipment. 

  • Capacitors

These electrical components are quite famous in the electronics world. These hold an electric charge in the board and release it through the PCB whenever different parts of the board require power. It collects opposite charges on separate conductive layers using an insulating material.

  • Transformers

Transformers are essential components that form high-quality PCBs. With a transformer, electrical energy flows from one circuit board to another along with correct voltage fluctuations to suit the transfer. 

  • Sensors

Sensors detect environmental and other external factors (in numerical values) and release an electric current (as a signal) in the circuit board. The electrical signal they generate corresponds with the circuit board and associated components to cause an effect or change. Sensors detect physical elements and external factors such as air quality, sound, and light motion and convert them into electrical signals.

  • Diodes

Diodes prevent electrical current from flowing in the wrong direction inside the conductive pathways of a printed circuit board. It blocks the electric current from going in the wrong direction to prevent excessive damage to the circuit board. The most popular diode is the LED or “Light-Emitting Diode”. 

Conclusion

What happens when a single component malfunctions in a printed circuit board? The whole PCB can malfunction and shut down the device it’s in! If it’s your smartphone or laptop, you’ve got little or no time left to use it if the PCB’s damaged (i.e., motherboard). That’s why manufacturers only source high-quality PCB electrical components to ensure the circuit boards function as intended.

The Right Way to Solder on Printed Circuit Boards

mwcms on October 28, 2022

Soldering is the most vital part of the PCB assembly process. It’s where the electrical components get attached to circuit boards. Without electrical components, no PCB would function effectively. There are various methods to sell electrical components to PCB and ensure electrical currents pass through the conductive pathways efficiently.

The main issue is that many people don’t know the right way to solder electrical components on circuit boards. Since a bunch of them are being used in factories, it can be quite tricky to pick the right one. We will discuss some of the top soldering techniques so you can choose the one that’s right for your business.

The Right Way of Soldering on Printed Circuit Boards

In the electronics world, soldering is a fundamental skill that nearly every professional must have at some point. Soldering and electronics go together like a fork and spoon.

Although people learn how to design, build, and release electronics without picking up a soldering iron, it’s still a vital part of the industry. Let’s check out a few soldering methods and techniques commonly used these days.

1.      Reflow Soldering

It’s the most common soldering method factories use today, especially for manufacturing surface mount technology or SMT printed circuit boards. This soldering method involves using a heated soldering paste to attach electrical components to the circuit board. The paste looks like molten metal, enabling professionals to connect pins and pads seamlessly. However, it results in permanent attachment.

2.      Wave Soldering

Wave soldering was once extremely popular for wave soldering. However, it’s still commonly used for surface-mount technology circuit boards. Printed circuit boards that go through the through-hole process (i.e., drilling holes in the board to fit electrical components) usually also go through the wave soldering process.

Generally, factories utilize wave soldering to produce massive PCB assemblies. The PCBs go over molten solder in a pan that looks nothing less than a wave pool. Once through, electrical components get attached to the circuit board.

Before coming in contact with the molten solder, the components are already glued to the board. Due to an additional step that reduces efficiency and somewhat increases the time and money consumption, reflow soldering replaced wave soldering.

3.      Braze Soldering

Soft and hard soldering is nothing compared to brazing. Brazing results in fortified joints between the printed circuit boards and electrical components, including transistors, inductors, and capacitors. It uses high temperatures to attach electrical components to circuit boards.

Although it’s similar to hard soldering (discussed later), brazing involves melting the underside of the metal components to get attached to the board. It causes the least thermal deformation and is one of the best soldering techniques for mass PCB production.

4.      Soft Soldering

Soft soldering is the perfect option for compact and fragile circuit board components. Soft soldering doesn’t damage the electrical components through high heat or molten solder. In this process, the temperature of the molten solder is below 400 degrees Celsius or 752 degrees Fahrenheit.

If the temperature goes over, it becomes “braze soldering”. The low-temperature technique is for smaller components prone to breaking at high temperatures or heat conditions. Although it’s suitable for small components and fragile boards, it doesn’t produce the strongest joints.

5.      Silver Soldering (or Hard Soldering)

This soldering technique also yields strong joints between components and circuit boards. However, combining metal components such as gold, silver, or brass-plated components is best. It’s used to connect and attach the same metals in other industries.

Conclusion

What type of printed circuit board you’re producing will determine the right soldering technique. Other factors influencing the soldering technique include existing capabilities, materials, and requirements.

Check which soldering technique offers the most lasting results and try to match it with your PCB requirements. Partnering with a solid PCB manufacturing company could ease the process and increase soldering efficiency.

What Goes Into The PCB Assembly Process?

mwcms on October 17, 2022

The fast-paced technology around us brought countless electronic devices and equipment into our lives. Those electronic items have PCBs at their core. This post is for you if you don’t know what PCBs are. Just like a living cell has a nucleus at its center, Printed Circuit Boards are present in nearly all electronic equipment and devices.

Manufacturers use the “pick and place” technique to assemble and produce PCBs based on Surface Mount Technology or SMT. PCBs are small green boards that have electrical components on them. The components get attached through soldering to make the final version of a PCB. Simply put, designing, layout, printing, soldering, and testing a board is the “PCB assembly process”.

What Goes Into the PCB Assembly Process?

The process involves various steps, including soldering, pasting, designing, and testing. In this section, we will look at those processes in a systematic sequence to give you a better idea of PCB assembling.

Reliable manufacturers align the processes with above-average standards to produce high-quality PCBs. As the vast majority of PCBs feature the surface mount technology these days, the process below is for the same type of PCBs:

  • Solder Paste

Before adding any components to the printed circuit board, manufacturers add solder paste to it. The paste is only for the component pads, i.e., only the spots that will have components on the board. It’s done using the solder screen and protective machinery.

  • Pick and Place Technique

The board with solder paste goes through the “pick and place” process. A machine containing components places them on the printed circuit board. The machine does that very carefully to ensure proper placement and in the correct position. The tension between the components and solder paste keeps them attached to the board, considering you don’t jolt the PCB too hard.

  • Soldering

After adding components following the solder paste, the boards go through the individual soldering process. That’s where the soldering machine will permanently solder each component to the board. However, this process isn’t widely popular with surface mount technology-associated PCBs anymore.

If the manufacturer uses the wave soldering machine, the first step of the assembling process will be the pick and place technique. The board won’t require solder paste separately as the wave soldering machine provides solder paste. However, reflow soldering is more popular than wave soldering for assembling PCBs.

  • Inspection

Without inspection, reliable manufacturers don’t release PCBs into the market or supply them to their business clients. Inspection deals with issues that might have developed at various stages of the assembling process. PCBs with surface mount technology have dozens of components and sometimes a hundred. Hence, manual inspection is time-consuming and discouraged.

Automatic optical inspection is a more feasible solution for surface mount boards. The optical inspection machines scan and detect poor joints, abnormal soldering, and inappropriate placement. It catches both visible and non-visible issues with the surface mount.

  • Testing

Once the inspection and correction are over, the PCBs go through the testing phase. Before leaving the manufacturer’s den, testing PCBs is necessary to ensure they’re functional and suitable. Factories use different ways to test PCBs and surface mount boards.

  • Feedback

At the end of the process, the manufacturers receive reports to monitor the overall production quality, especially concerning PCB quality. Factories check for issues and monitor the functionality of PCBs during the testing phase to know they’re producing high-quality printed circuit boards. 

Conclusion

All PCB manufacturers rely on quality and safety standards to deliver reliable printed circuit boards. Furthermore, many types of PCBs are on the market to fit various electrical devices and equipment.

Learning about the PCB assembly process enables you to find the right manufacturer based on your requirements. If you’re developing electronics or similar goods, you’ll require an extensive insight into the assembling process to use the perfect PCBs for your projects.

Why Surface Mount Technology is Better Than Conventional Technique

mwcms on September 28, 2022

The standard practice for manufacturing PCBs involved through-hole circuits. It’s a simple method and refers to cutting holes in the circuit board to fit electrical components as required. However, it can be very time-consuming if used for mass production of through-hole PCBs.

Machines drill holes in the boards, mount components over those holes from one side, and then thread the holes in the board using lead. Since innovation leaves no technology untouched, the through-hole practice became obsolete only a few years after surface-mount technology or SMT took the stage.

Surface-Mount vs. Conventional Technique: Benefits of SMT 

It was the solution manufacturers wanted. SMT enables manufacturers to produce PCBs at high speed and with more material efficiency. Furthermore, it brings adequate vibration resistance and the possibility for customized soldering techniques. Let’s take a broad look at how SMT transformed the world of electronics and PCB production practices.

  • PCB Miniaturization

The electrical components attached to circuit boards using the surface-mount technology are much smaller than through-hole interpolation components. The geometric volume and size differences in conventional and SMT techniques take PCB miniaturization to the next level.

The SMT technique has reduced the size of many electrical components by 60% to 70%. Over that, some components even got reduced to 90% of their size thanks to surface-mount technology. The same goes for the weight. Hence, with SMT, PCBs have become smaller and more lightweight.

  • Low Material Costs

You will see a significant difference when you compare the material costs of conventional PCB manufacturing techniques and surface-mount technology. Considering the miniaturization that SMT brings into the PCB world, the material costs are significantly low.

Since small PCBs have smaller components, the material costs reduce automatically. In turn, that drives the price of SMT PCBs downwards, making it a more favorable option in electronics.

  • Simplified Production Processes

The surface-mount technology simplifies the production process to a massive extent. For instance, the mounting technology requires manufacturers to bent, shape, and cut the electrical components before mounting them on the circuit boards.

That automatically reduces the time, energy, and money spent attaching components to the circuit boards. Hence, the process simplifies, making it far more manageable and less time-taking.

  • Better Production Efficiency (and Automatic Production)

Surface-mount technology pioneered automatic PCB production processes in factories. It involves standardization and serialization in the production process. Moreover, it also brings consistency to the welding processes for attaching chip components to SMT printed circuit boards. Thus, the reliability of compact components on miniature PCBs will increase while the rate of component failure reduces gradually. 

  • Improved Signal Transmission Speed

Do you know that SMT brings higher safety density to PCB structures? Although the technology created miniature printed circuit boards, it also improved the safety density. For instance, the solder joints per cm2 can be around 5.5 to 20 as assembly density.

You must realize that high signal transmission speeds will also increase PCBs’ resistance to impact and vibration. This could ultimately result in high-speed operations and better electronic equipment around us. 

  • Better High-Frequency Effects

The distributed parameters of the circuit boards are generally high. However, they reduce drastically when the components attached to the board either have no or short lead. That’s because the absence or negligible amounts of lead causes reduced RF interference.

Conclusion

Learn about printed circuit boards and your requirements before choosing surface-mount technology. You will require thorough analysis and proper planning for successful end-product manufacturing if it includes PCB.

And if you’re planning mass production, make a prototype for testing. With surface-mount technology, you can create simpler designs and compact devices with quicker completion times. However, considering your requirements is best to do a cost-benefit analysis.

The Key Characteristics of the Surface Mount Technology: PCB Assembly

mwcms on August 30, 2022

Surface Mount Technology or an SMT is a method of manufacturing circuit boards. The alternative to this would be through-hole circuit boards with different circuit board designs. Most circuit boards that you see in mobile phones today are a bunch of small chips placed on top of a circuit board panel.

Surface Mount Technology

A circuit board with surface mount technology will not necessarily have holes inside. Instead, they are on top of copper pads and copper traces on the circuit board. This surface mount technology is a semi-automated process that allows manufacturers to build all the different circuit boards in-house for various products.

With the help of this technology, manufacturers can easily mount electronic components on the surface of printed circuit boards. This mounting technique is very different from the insertion technique that manufacturers conventionally use with holes.

In other words, it is an alternative to the older practices of developing circuit boards with the help of through holes. Since it is a newer rendition, it overcomes many shortcomings of the through-hole technology on the surface mount.

SMD

One of the critical characteristics of the surface mount technology is an SMD, otherwise called a surface mount device. When you browse the markets, you will find multiple range packages of SMD. These packages vary in different sizes and shapes.

SMD Passive Components

A large portion of the SMD resistors are either capacitors or resistors. The package sizes of these passive components come in sizes standard pack. Other surface mount device components include crystals and coils.

Resistors and capacitors generally vary in dimensions, shapes, and sizes. Other forms of SMD components that you can find include diodes and transistors. These are often very small in regards to shape and size. They connect within a circuit board with the help of leads.

Approximately three leads are included within these packages. Identifying which way the device must shift can help with the manufacture of the printed circuit board.

Integrated Circuits

You will find that there is a variety of packages that come in handy for integrated circuits. The use of the package depends entirely on the amount of interconnectivity that the component needs. For instance, a logic chip is only installed with 14 to 16 pins. On the other hand, other processors and chips can come with about 200 or more.

Since requirements can vary so greatly, there are a number of different packages that you can find. Like the packages, the processes in the SMT process also differ from the conventional through-hole PCB method.

Solder Paste Printing

One of the most distinctive processes of the SMT method involves solder paste printing. This refers to the place where you need components. The printed circuit board usually comes with a very fine and thin piece of metal.

On the circuit board, there are solder pads. In surface-mount technology, stencils and squeegees usually do the job of applying solder to the appropriate pads on the circuit board. This method of solder mask application is becoming very widely used and popular. This is especially the case in the subcontract sector.

To Conclude

As you can see, the surface mount technology has great significance today and is prevailing against the conventional through-hole method. The characteristics of the surface mount technology in the PCB manufacturing industry, along with its large-scale implementation are speeding up the manufacture of electrical appliances and technology. This, in turn is accelerating the world towards a prosperous future.

 

How is PCB Made in China?

mwcms on August 14, 2022

Circuit boards are the heart of just about any piece of electronic item that you use. China is responsible for a big chunk of the world’s circuit board production. In hindsight, printed circuit boards are a specific assembled product, even though they may look very complicated. The United States have largely relied on China for PCB production, but there seems to be a re-shoring trend underway.

The Re-Shoring Trend

Re-shoring is the act of having production units that were outsourced at foreign locations back to your hometown. US PCB companies have been setting up production units back to their hometowns and shutting down operations in other countries. The reason for this move is the increasing amount of labor costs in other countries, paired with the prevailing supply chain issues that are slowing down delivery times.

Not only that, due to the Geopolitical tensions, US citizens now demand that the products they consume are natively built. There is also a threat of intellectual theft when you hand over technical operations to other countries. Taking all of these existing factors into account, the re-shoring trend has become evident.

Below, you can get a glance of the technical process.

The Very First Step

Before a design file can be put into production, engineers will first glance at the file to ensure there are no inconsistencies within the design. Engineers need to check things such as trace gaps, files, drills, and other aspects of the digital PCB design they receive. This will ensure that the engineer did not design the PCB in a way that you cannot manufacture it.

Printing the Design onto Film

Once the design is reviewed and corrected, the design will then turn into films. You can make films and use light to project an image onto a board with a photoresist. This is similar to how you would expose a photograph. Once you have the design, you need to transfer it onto a copper board blank. Before you can shift the film onto the blank board, manufacturers will first prepare the board.

Board Production

The PCB board is manufactured using a layer of fiberglass in between and then gluing copper on the outside. In a large-scale manufacturing unit, large sheets of blank PCB boards are cut down into smaller components. After the board is cut, it is sent to the drilling unit. There are two reasons manufacturers drill a printed circuit board.

The first is to connect the components, and the other is to accommodate the wire holes connecting the copper layers. To begin with the drilling process, an operator will take an MDF board as exit material.

They will then attach an aluminum sheet on top of the board, which acts as an entry for the machine drill. This machine is fully automated, allowing it to select the right size of the drill. After doing so, it loads it into the drill head.

Most PCB manufacturing units in China will use highly optimized drills that can rotate up to 15 thousand revolutions per minute. After that, the corners are trimmed to make them rounded, and the surface is cleaned. Then, the machine automatically smoothens the edges of the board.

Final Steps

The steps that follow allow the board to go through a series of processes where copper is plated, and a printer prints photosensitive film to the copper board. Once the film is attached, further mechanical processes and solder masking will lead to the completion of the printed circuit board.

The solder mask protects that copper surface. The attachment of the components and testing is done with the help of machines. After the testing is complete, workers will separate all individual PCBs from the large production panel.

 

How to Repair Broken Traces on a Circuit Board?

mwcms on July 26, 2022

Different methods can help you repair broken traces from a circuit board. Today, there is a prevailing shortage of microchips that are microprocessors. Traces are what connect microchips and all other essential components on a circuit board.

Damages on Traces

Traces on a circuit board are not new to damage. They can suffer from damage in several ways. They can get damaged due to accidents or even due to dirt or residue. Most of the time, damage on the PCB traces is due to corrosion. Corrosion can happen because there is a leak in the electrolytic capacitor or a leak in the batteries. They can also be caused due to poor storage. To repair broken or damaged traces on a circuit board, you will first need certain tools and equipment.

What will you need?

To start with, you are going to need a soldering iron. Remember that your soldering iron does not have to be the best in the market. However, it is recommended that you have a soldering station rather than just one soldering iron. Along with that, you will need a high-quality gel flex and a very good set of precision tweezers.

You will need a blade, scalpel, or sharp object for cleaning, and a UV solder mask, along with solder, for reapplication. Do not forget that you will also need some wire for the actual trace repair. Afterward, you will need some isopropyl alcohol and some q-tips, cotton buds, and a toothbrush.

It is also very good to have multimeter so that you can keep a check on your work progress. Not to mention, a multimeter will be beneficial because it helps you keep a check on your work to make sure you’ve renewed continuity in the damaged traces.

Other things you’ll need include very sharp eyesight and a steady pair of hands. If you don’t have good eyesight, it is always a good choice to use a microscope. A microscope is an effective way to se what you’re doing without making errors.

You can even connect a camera to this microscope to enhance your work. Since a microscope can be pricey, they are not easily available. In this situation, a magnifier is a better alternative when trying to repair broken traces on a printed circuit board.

Use Enameled Wire

You should use enameled wire, the same type of wire you would use on a transformer or an electromagnet. It has an enameled coating, which means that it is insulated, making it very functional inside a printed circuit board. Nonetheless, this enameled coating comes off very easily with the heat of the soldering iron.

So if you need to run a trace over the board where it might come in contact with other metal, the insulation will stop it from creating a short. As you can see, repairing broken traces on a printed circuit board requires extensive consideration and thought, and you must be willing to take all the precautions to do a clean job.

To Conclude

With careful consideration and some knowledge of printed board repair, you can easily repair the broken traces on a printed circuit board. The above-mentioned types of equipment can help make the repairing process easier. All you have to do is spot the broken trace, clean the corrosion, and apply new wires on them with the help of solder.