Circuit Board Components and Their Applications

mwcms on June 20, 2022

A PCB board or a circuit board is a critical component of almost all electronic pieces of equipment that are computerized and made to limit manual efforts. Even though they may look small and ordinary, circuit boards often have many complex components that synchronize to make a particular device function.

These components play a critical role in the functioning of a circuit board, which is responsible for the performance of all electrical items. Components attached to circuit board assembly can vary depending on the electrical appliance’s functions. However, some components are commonly found on all circuit board assemblies because they’re essential.

Resistors

Resistors are available in different shapes and sizes for circuit board assembly. A resistor is an electrical circuit that is meant to, as the name suggests, resist electric current flow. It is bound by Ohm’s Law, where voltage equals current multiplied by resistance. It encourages the restriction of electrical discharge. It is similar to how you narrow down a pipe to resist the amount of water flowing inside a tube.

Capacitor

There are all kinds of different capacitors, and they store charge in an electrical field. If you have a noisy electrical signal and voltage change, it will hold a charge and let some of the current out. It will then take on some charge when it reaches a peak. This means that you can smooth out a noisy signal with a capacitor.

Diode

The diode is the simplest semi-conductor. It allows the current to flow in only one direction and stops the flow if the current tries to flow in the other direction. LEDs or light-emitting diodes are different types of diode components on the printed circuit board capacitor.

Soldering the LED onto the printed circuit board is tricky, but it’s necessary when equipping a printed circuit board that powers an electrical component such as a mobile device. You can also find different sizes for LED parts.

Transistors

A transistor is a switch that has three leads. One of the leads is called the gate. If there is a current on the gate, electricity will freely flow between the other two leads. There are different types of transistors, some that only switch minimal loads, while others are bigger and can switch larger loads.

Micro Chips

Microchips are semi-conductors that come in every shape and size imaginable. They also start simple and get very complicated. Although it’s easy to solder them onto the printed circuit board by hand, they will perform much better when subject to machine assembly.

The contacts are underneath some of the chips and not easily visible. These types of semi-conductors are what you get if you take millions of transistors and put them together in the same package.

These microchips carry the majority of processing power in an electrical component. Different microchips are suited for different tasks, and it depends on the data they carry. The exact same chip can perform two different functions.

Final thoughts

The above-mentioned PCB components are some of the most critical and commonly found ones on circuit boards. Each one contributes to the flow of current around the printed circuit board, which is pivotal for the functioning of an electrical appliance.

 

Why are Circuit Board Assemblies Printed?

mwcms on May 25, 2022

Before the invention of printed circuit boards, electronic components inside a device were subject to manual connectivity, using wires. This manual construction accounted for many challenges in the manufacturing system.  These circuits were extremely complex and difficult to manage. Not to mention, repairing a damaged circuit was a tedious task, and often times not reliable. In 1936, Paul Eisler, who was a brilliant engineer that worked in a newspaper company acknowledged the issues of the old circuit board assembly.

This allowed him to give birth to a new concept of printing on circuit board assemblies. He introduced a printed copper circuit on a non-conductive board. This formed a board with traces, and on top of these traces, you could connect electrical components. The very first PCB manufactured looked nothing like a modern PCB, even though both follow the same mechanism. Modern PCBs are much more sophisticated, smaller, and complex.

Manufacturing process

When manufacturing PCB of today, you have to start from a simple copper flat sheet.  The manufacturing process and complete circuit board assembly turns the copper sheet into a sophisticated printed circuit board in a detailed manner. To start off, a layer of copper foil laminates on a flat sheet of glass fiber material. The glass fiber material offers mechanical support, and it remains with it until the manufacturing process ends.

Drilling Process

Once the aluminum sheet is arranged, it undergoes the drilling process. In this stage of the process, the printed circuit board undergoes registration holes on each side of the board. These holes act as the reference point for the alignment processes which will come ahead in the manufacturing. While the foundational board is being drilled, an engineer uses computer simulation software to design the circuit.

You can find many computer-aided platforms that allow you to create design files known as Gerber files. These files contain 3D models of PCB design. These files also dictate the arrangement of holes that the drilling machine will make. These holes are the places where the components are placed.  After the drilling process is complete, the board undergoes a cleaning process. Cleaning allows all the residues to extinguish from the board that came with the drilling process.

Production of Copper Traces

After all the holes have been drilled, you can move on to the copper traces. A great way to accomplish this copper traces is through etching. This is a chemical process in which you have to use a resistive mask to cover the copper plates. This mask will easily cover the plate since it will have the same pattern of circuit you want.

If you happen to dip this arrangement into an alkaline solution at the temperature of 60 to 120 degrees Celsius, then the area of copper that is uncovered by the resistive mask is dissolved. You can also say that it is etched away. After this process completes, protective mask which was covering the circuit board also washes off in the next process.

Final Thoughts

As you can see, circuit board assemblies of today widely use surface prints and designs. Gerber files align all copper traces in the form of a print, which makes printing a quintessential process of circuit board assemblies. Furthermore, the printing process also helps speed up the process, which is ideal for mass production. Overall, printing process helped make PCBs more optimized, accurate and standard, which in turn was pivotal for the quality of the boards.

Printed Circuit Boards and How They Function?

mwcms on May 9, 2022

Every electronic component has over a hundred to three hundred meters of wires. Today, electronic components are multi-functional, and they can operate many components at once. For electronics to work, each component needs to be interconnected, and they need to have all components work seamlessly together. A single wire in a smartphone can cover a football field. However, you cannot see these wires even if you open up the smartphone.

This is because they are inside the Printed Circuit board. A printed circuit board or PCB is the green board that you find inside electronics. This circuit board has multiple layers with hundreds of different copper wires. A PCB gives all the components inside the PCB structure and organization. The wires that run in between the PCB component allow all the components to be interconnected with one another.

How do PCBs Function?

Before you learn how Printed Circuit Boards function, you need to realize that there is a difference between components and PCBs. The components of the Printed Circuit Board include Microchips, Capacitors, Resistors, and Connectors. You can find these components mounted on top of the PCB with the help of a solder mask. A PCB without the components is simply a flat board without anything mounted on it.

You can also find other components with the PCB, however, they are not mounted on the board, but rather attached on it. If you take an X-ray picture of a PCB, you will find conductive wires clumped up inside, and you will also find light shades that are non-conductive insulator material. The dark shades will present multiple layers of wires that are aligned on top of each other.

Even though they are layered, they do not come in contact. Microchips are mounted on the PCB on a grid of connection points or pads known as the ball grid array. Microchips are like the central functioning units of any highly specialized component. There are many pads and compartments on the printed circuit board for other microchips.

Conductive Layers of the PCB

The PCB consists of multiple conductive layers. The top and bottom layers are the ones where you mount the components. Each of the components on the circuit board requires power to function. This is why the printed circuit board has layers that are only responsible for providing power.

They are called power planes and ground planes. Additional ground planes are used for heat dissipation and electromagnetic shielding. Other layers carry signal wires which help in communication. Each of the conductive layers has copper, insulating fiber glass, and epoxy resin that shuts down the flow of electricity. PCBs can have anywhere from 2 to 50 layers depending on their application. However, most of them will have a total of ten layers.

On the top and bottom is a colored solder mask that is covered. This not only keeps the mounting pads intact, but also provides insulation. On top of that you have silkscreen, which is ink that provides markings for where you need to store the components.

Final Words

As you can see, printed circuit boards play an integral role in the majority of the electronics you see today. Years of careful engineering and evolution have led to the printed circuit boards you see today, which is why they have been perfected to the core.

Interesting Facts about Circuit Board Assemblies

mwcms on April 26, 2022

PCBs or Printed Circuit Boards are major components of all electronic items. Normally, most people know very little about circuit board assemblies. A circuit board can easily be the heart of any electrical component. Below, you will learn about some interesting facts and history about the printed circuit boards.

PCB was Made Up of Brass

By using PCB, you can reduce the size of electrical components and wires that are needed for electronics to function. Since it is a replacement for all electronics and wires, you would normally think that a printed circuit board is made of copper. Even though this is true, it is worth noting that PCB was first made up of brass, and not copper. Today, they more commonly consist of fiber glass, composite 2 proxies, and other material.

PCBs Widespread Application and Forms

PCBs or printed circuit boards are also used in the printing industry. It is generally the backbone of modern day electronics. Circuit boards come in many different forms, and most PCBs are assembled using only a single layer. More sophisticated electronics and hardware such as motherboards, computer graphics or other cards can have multiple layers that sometimes can also go up to 12.

Even though PCBs are often linked with computers, they consist inside many other electronic devices, including radios, TVs, cell phones, and digital cameras. Along with their applications in consumer good electronics and computers, they are also applicable in a variety of other fields. The many different types of PCBs allow for them to be used in many other applications.

PCBs have different types

There are many different types of PCBs which you can find. These include:

  • Single sided PCB or Single Layer PCB
  • Double Sided PCB
  • Multilayer PCB
  • Rigid PCB
  • Flex PCB
  • Rigid-Flex PCB

 Single Sided PCB

Single sided or single layer PCBs are the cheapest circuit boards that you can find. These types only have one layer of the base substrate fiber glass. Furthermore, they also have one conductive copper layer. Electronic components for this PCB have holes that are not plated through. The compartments for the electronic components are on one side, while the conductive circuit is on the other side. Since there is only one conductive layer that forms this circuit, it is called a single sided PCB or one layer PCB.

Double Sided PCB or Double Layer PCB

Printed circuit boards of these types have one single layer of the base substrate, but conductive copper layer on both sides of the substrate. On this type of printed circuit board, you have to apply solder mask on both sides of the board. On top of that, holes for electronic components need to be plated through so that there is conductivity on both the circuits.  Holes on the double layer PCBs allow circuits on one side to be attached to circuits on the other side.

Multilayer PCBs

In this type, all the layers are interconnected with the help of copper plated holes. These layers can be multiple, and even range up to 40 layers. All the electronic components of an item are assembled on both, the top and bottom layers. On the other hand, the inner stacked layers are meant for rooting. Both, through hole electronic components and surface mount components can attach to either side of the PCB with the help of solder mask.

Final Thoughts

The earliest PCB assemblies were connected to each other manually, using wires. This manual construction led to errors and difficulties when it came to scaling up production. Today, printing techniques that conduct copper circuits on a non conducting board has revolutionized electronic items, making them smaller and more efficient.

How did Circuit Board Assemblies Evolve?

mwcms on April 15, 2022

All inventions go through evolutionary courses. PCBs, or printed circuit boards, went through an incredible course in history. If there is one thing that has challenged the electronic assembly industry, it is the need for miniaturization. As components inside an electrical unit get smaller and closer together, it pushes the printing and cleaning process to the edge. One may think that miniaturization is a product of the last 5-10 years. However, this process began about a hundred years ago.

History of Circuit Assemblies

When you think of circuit board assemblies, you instantly think of them as modern technology. It all started with Albert Hanson, a German scientist who filed a patent for a device that would improve telephone exchange boards. This primitive circuit board had wires attached to a conductive substrate and bonded to a flat surface.

This device consisted of technology that you would consider a precursor to the modern-day circuit board. It also had the simple through-hole design of today’s circuit board. The first real circuit board came patented in 1927 by American inventor Charles Ducas. His circuit board design had stenciled conductive materials on a wooden board that was flattened out.

This may be how the word, “board” is incorporated into what you now call a circuit board. Charles Ducus utilized a stencil to print the wires directly onto the board. He also applied ink for the conduction of electricity. This concept aligned the electronic path to an insulated surface, which created a more recognizable device as a printed circuit board today.

Evolution into Multi-Layered Circuit Board

Ducus conceptualized his invention further and thought of the possibility of layering multiple boards, which will give existence to a multi-layered circuit board. However, connecting multiple boards into a multi-layered object would require another great inventor who had the capabilities to turn his concept into a reality.

Then came Paul Eisler, who is widely known and appreciated for inventing today’s printed circuit board. After leaving Australia in the early days of World War 2, he settled in England. He worked in a newspaper printing company, which led him to use his printing expertise to formulate an idea that printed electronic circuits onto boards.

This was a giant leap forward in the labor-intensive practice of hand soldering each wire manually. His inventions helped in World War 2 because they were used in radio sets that the British and Americans used during the war.

Etching Design

In 1943, a patent was issued for a circuit board design that was more advanced than the one used in World War 2. It involved etching the circuits onto copper foil and on glass-reinforced non-conductive substrates. In 1948, the US Army released this technology to the public so that it could prompt widespread development of the innovation.

Transistors

In the 1950s, the printed circuit board became subject to further enhancement as transistors emerged. These components helped reduce the size of the electronics and made it easier to incorporate PCBs into electronics. This also improved the reliability of the electronics, and it started the beginning of the long-driven goal of miniaturization. In the 1950s and 60s, PCBs evolved into double-sided boards with identification printing on one side and electronic components on the other side.

Concluding Thoughts

Today, printed circuit board designs have zinc plates, silicon chips, solder masks, and more components that make electronic components more effective. Moreover, the circuit board assembly technology known as the surface mount technology dominates the PCB world. Surface Mount Components are soldered directly onto the board and have become industry standard.

PCB 101

mwcms on March 28, 2022

Circuit boards, which also go by the names, printed circuit boards and PCBs, consist of various electrical components. Comprising insulated board materials along with dozens of electrical components, PCBs feature different technologies ranging from surface-mounted to interconnected systems. They’re made for specific electronic circuits and perform a specified or a set of different actions.

Since their early development during the 1900s, the laminate materials on PCBs have gone through various developments and technological advances. Charles Ducas was the first to submit a patent for his circuit. The idea was vividly defined as placing a pathway comprising electrical components directly over an insulated material board. But, the real development and use didn’t find ground until after World War II.

Typical Use and Purpose of Printed Circuit Boards

In today’s modern world, just about every device has a printed circuit board. Nearly all electronic devices around us have some type of PCB or a combination of them to function effectively. In simple words, PCB technology was a ground-breaking development that paved the way for massive technological advancements to take place on a global scale.

The PCB technology is powering a range of applications and equipment across multiple industries. It’s safe to say that without modern printed circuit board production, research, and development, it wouldn’t be possible for massive innovations to take place in our technological space. Here’re a few uses and PCB’s modes of deployment around us:

Aviation

Aviation utilizes high-performance and lightweight PCBs to operate and design aircraft. Considering the size of the size of a typical PCB, that’s a humungous role that the technology is serving at the moment. From communication and drone construction to guidance systems, PCB technology offers lightweight and functional solutions.

Automobile

The automobile industry uses PCBs in a rather spectacular manner. The use of PCB allows automobile brands and manufacturers to place safety sensors inside vehicles! From keyless entry to ignition systems, PCB enables a range of different features in different makes and models of vehicles around us. Besides, the latest computerization of vehicles has stirred up demand for more intelligent vehicles.

Home Automation

The home automation industry is also utilizing PCB technology to assist in different features and other technologies. If you live in a home with a surveillance system, smart thermostats, and smart appliances, just about all of these technologies will have PCBs.

Entertainment

The entertainment industry probably has one of the biggest innovations that mankind has ever seen, thanks to PCB technology. It’s the development of flat-screen televisions. Humankind would’ve been stuck on fat monitors and TVs if PCBs didn’t replace the tube technology and wiring that was used previously. Even the miniature MP3 pods you may have used comprised of tiny PCBs that enable music playback and audio recording with wide variations.

Lastly, we don’t need to tell you what smartphones are, what they’re for, and how they’ve made our lives easier. However, it’s best to share that they comprise industry-best PCB technology to enable different functions and features that most users require regularly.

Latest Advances in the Technology

Here’s a list of some of the major advances in PCB technology, including fabrication techniques:

  • LDI, which stands for Laser Direct Imaging, is among the most precise ways to create PCB materials’ design images. It replaces the photochemical process that was too troublesome and usually inaccurate.
  • Flex PCBs technology allows greater flexibility in the fabrication of printed circuit boards. Thus, it’s easier to handle application-specific requirements when using PCBs in other technology-associated devices.
  • HDI stands for High-Density Interconnect Boards, is the main technology in use for efficient electrical component placement on insulated board material. It allows the placement of more components while requiring less space. Hence, it offers greater reliability and performance with reduced weight and space.

Conclusion

In the end, there’s a lot more to the PCB technology than just the recent developments and new fabrication techniques. Find out more through the latest research and studies to learn how PCB technology enabled a new era in modern technology.

How Each Small Component Works Together to Form a Circuit Board

mwcms on February 16, 2022

Imagine spending a day without using any electronic devices? Well, considering how our lives are integrated with modern technology and various electronic devices, such a task would be pretty impossible. Electronic gadgets are a part of our lives, and without them, you can’t complete tasks efficiently, or at least not without wasting valuable resources. This is all thanks to printed circuit board technology powering the majority of the devices out there. But what components are necessary for PCBs? Or, how do those important components integrate and function to form a perfectly-working printed circuit board?

In this post below, we will check out some of the main components of a circuit board that helps it function properly in the long run. Plus, you will learn the importance of each one and how it can be disastrous for a circuit board if a respective component stops working.

Inductors

These are electronic components based on the passive two-terminal form. Once a current passes through the inductors, they form a magnetic field to store the generated energy. Inductors are placed on circuit boards and help other components by restricting alternate current passage and allowing only direct current. They help form tuned circuits with the help of capacitors. Most often, you’ll find that tuned circuits inside TV and radio receivers consist of inductors.

Capacitors

These electronic components are based on the passive two-terminal form. However, their main purpose for attachment on a functional circuit board is to act like rechargeable batteries. By storing the energy at a previous time, they transmit the energy to the other components and the circuit board when required.

Resistors

Resistors are among the core elements in the list of components attached to different types of circuit boards, including PCBs. They are responsible for regulating the voltage in every connected component on a circuit board while also controlling the level of electric current that passes once the circuit is operational. Usually, the main cause behind a circuit board and its components overloading is resistor failure. Different components, apart from the resistors, aren’t very effective at regulating and handling varying voltage levels.

Transistors

In addition to their multi-functional nature and various capabilities, transistors are quite important in the fabrication of printed circuit boards. In general, transistors are nothing more than semiconductor devices that conduct and insulate while acting as amplifiers and switches for circuit boards and other components. Once integrated, they work efficiently despite lower voltage and negligible filament current.

Transistors are usually small in size but have a longer life than several major components of a printed circuit board used today. Further, there’re two different types of transistors:

  • Field-Effect Transistors (FET)
  • Bipolar Junction Transistor (BJT)

Diodes

The diode acts as a switch for currents inside the printed circuit boards by allowing one-direction current to pass through different components on a printed circuit board. They’re semiconductor components that allow currents to move only in one direction while restricting flow from moving in the opposite direction.

There’s more to a printed circuit board than you might see at first. The abovementioned components aren’t the only ones that make up a functional circuit board that integrates efficiently with other parts of a device. Several other components are necessary, but the circuit board won’t be integrative without the ones mentioned above.

Conclusion

Whether you’re communicating with your loved ones abroad or making a hot cup of cocoa in the kitchen, you’re using technology that’s powered by printed circuit boards. While there are other types of circuit boards in the industry, PCBs are at the forefront of nearly all major technologies and innovations that we need regularly. Miniature electronic circuits are a massive solution to our time-sensitive work completion needs. But, the integration of all the small components on the said electronic circuits is even more important.

Circuit Board Assembly – How Is It Manufactured?

mwcms on January 31, 2022

The assembling and manufacturing processes begins with the solder paste that sticks to the board used for connecting electrical components. Following that, the process moves to the “pick and place” procedure of the components. In simple words, the entire circuit board manufacturing process includes soldering, inspection, and testing. After the manufacturing process is complete, experts need to send feedback depending on any failures or difficulties with the help of intelligent technology. All stages of the manufacturing process are under monitoring.

With that said, most manufacturers ensure high quality through supervised operations. In the post below, we will discuss the assembly and manufacturing process based on surface-mounted technology for PCBs.

Two Important Stages of the Assembly Process

Check out the two most important stages of the assembly process that lead to high-quality manufacturing:

·         Solder Paste

The first step involves using solder paste on the board using a process that’s similar to screen-printing. The only difference is that it relies on a stainless-steel stencil, which is positioned over the PCB. This way, the assemblers only apply the solder paste to particular parts of the circuit. These areas with the solder paste are where the components will sit.

·         Pick and Place

All boards coming from the assembly process containing solder paste will move to the pick and place process. There, a machine containing component reels will dispense and place components on the board safely where required.

Let’s take a simple overview of the entire manufacturing process below!

Simple Overview of the Manufacturing Process

Here, we will discuss the entire manufacturing process in the most simplified manner for greater comprehensibility. Since the boards aren’t jolted, the solder paste must be effectively and efficiently pasted on them. Why’s that? Well, the quality placement of solder paste will also keep the electrical components in a fixed position on the board.

For wave-soldered boards, pick and place machines add tiny dots of glue to hold the components in place. But, this makes all the repair processes cumbersome because the glue can get messy and interfere with the boards’ components.

The printed circuit board design information allows the pick and place machines to learn about the position and all component information. This allows the machines to program the components as per the requirements. Here are the different stages of the manufacturing process that you must know about:

·         Soldering

The boards pass through the soldering machine once the assembly process of placing components on the boards is complete. However, you must know that some processes involve the use of wave soldering machines, i.e., not for the latest PCBs that are powered by surface-mount components. Since the wave soldering machine provides the solder paste, it doesn’t need to be added separately to the board. As the latest PCB fabrication and release involves surface-mounted technology, the use of reflow soldering techniques is more widespread.

·         Inspection

Once the boards pass through a soldering process, they require careful inspection. This is most important to the overall manufacturing process. Firstly, it ensures high-quality manufacture with defects identified on the spot. Secondly, as failure is detected, the rest of the production can be held and made correct by rectifying the respective errors. Since the surface-mounted PCBs use hundreds or even more components on the insulating board material, a manual inspection can be tiring and time-consuming.

For that reason, automatic optical inspection is a more viable option. From misplaced and wrong components to poor joint placements, the respective optical inspection system can detect a range of failures and errors.

·         Testing and Feedback Report

Before leaving the factor, the manufacturing experts perform a test to make sure that all PCBs are functional and high-quality. Furthermore, sending the feedback report allows the manufacturing to suffer from fewer failures and errors.

Conclusion

The detailed post above contains the entire manufacturing process in a simplified way. All essential processes of assembly and manufacturing have been discussed. For your information, the entire production process is considerably optimized so that the level of defects is low. That’s one of the major ways manufacturers ensure high quality. The abovementioned operations of the manufacturing process are quite important to meet the growing demands and expected quality for high-end technology placements.

A Brief History on PCBs

mwcms on January 24, 2022

The printed circuit board enables all electrical components to work together in order to function all electronic devices that you see today. The printed circuit board, therefore, optimizes the functionality of electronics and has taken over many roles throughout history.

For instance, it primarily acted as a component holder. Then, it became an alternative to unnecessary wiring and cabling. Today, it is the superstructure for high-speed design.

The Birth of the First PCB

In 1940, the first printed circuit board was produced, and it was for the proximity fuse for the artillery shells. This was the middle of World War 2, and Great Britain was at war with the Nazis. Since they were on the back foot, the intelligence committee of Britain came up with a proximity fuse. This was inserted into the shells and exploded as it came near an object.

This invention was revolutionary for its time as it included a circuit that could detect when it was close enough to something and then explode. The UK was very successful with this invention. Moving forward to the post war era, the war ended in 1945. And in 1947, the first transistor was invented.

This transistor revolutionized the way people viewed electronics and changed the world of electronics, pushing forward great success. During this period of time, the first application of the transistor was the television set, and it was popular.

The circuit board inside the television set looks nothing like the printed circuit boards of today. Instead, it looked like individual components were strapped in, and wires were soldered to each of the component’s leads.

This was a very manually intensive way of building an electronic device, and it may have taken a couple of days for manufacturers to make them. If someone is sitting there and soldering all day long, you begin to wonder about the quality of the product as well.

Introduction to Etching Copper

In 1956, the US army patented an etching copper board. At that time, this was a very unusual way of making a circuit. The idea for etched copper involved getting a plain copper surface and then etching out the traces you’d want. After that, attach leaded components, or “through-hole components,” and you would put them through the board.

This was revolutionary because it turned a difficult and time-consuming process into one that you could complete in 20 minutes. This was a giant leap forward in electronics manufacturing. Granted, you only had one-sided boards at that time, but it served the purpose of getting from point A to point B.

PCB Today

A printed circuit board today is highly optimized because of miniaturization. Today, when you look at a highly specialized circuit board, you find really tiny components that neatly align to a board that connects all of the ports, headers, and sockets. These traces on printed circuit boards have made all of the modern electronics possible.

Before they became widespread, connecting components inside an appliance was a time-consuming and unorganized process. The idea of embedding wires on flat fiberglass made it possible to minimize highly complex electronic devices, such as smartphones and laptops.

Moreover, the printed circuits boards of today also have layers of copper on both sides of the fiberglass board, making them hold more components.

To Conclude

As you can see, the technologies of printed circuit boards have come a long way, and today they serve the most important functions for humanity, driving the wheels of commerce and information.

 

Differences between Surface Mount Assembly and Electro-Mechanical Assembly

mwcms on December 28, 2021

There are different ways you can assemble micro-electrical components on a printed surface board. And the surface mount assembly is more popular than the electro-mechanical assembly.

Nonetheless, each has its own advantages and disadvantages. To understand the difference between the two, you must have an overview of both methods.

Surface Mount Assembly

This method is a way to produce electrical circuits by directly placing or mounting the components on the surface of printed circuit boards. In this method, all components or devices are mounted on the board with the help of a solder mask.

If the assembly method is surface mount assembly, the production process will be incredibly fast. However, it has many drawbacks as well.

For instance, even though the production process significantly speeds up, it simultaneously increases the risk of defects during the assembly process.

This is largely because of the miniaturization of the components, along with the denser packing of boards.  In these conditions, testing and inspection for failures and errors become increasingly critical in the manufacturing process. The manufacturing of printed surface boards using surface mount assembly includes a sequence of processes.

The assembly process starts with the application of solder paste. This is the substance on which the electrical components are mounted. After you apply the solder mask to the board, you move forward to placing the components. This can be done manually or with the help of machines.

This process then moves ahead to the reflow soldering process, after which all the excess solder is cleaned. After these steps, the surface mount assembly process is complete, and you can move on to the testing phase of the printed circuit board.

Electro-Mechanical Assembly

Electro-mechanical assembly is heavily reliant on machinery and other automatic drive units. Electronic products consist of interconnections and many components. These components can also be devices that alter the flow of electricity, such as resistors, conductors, and capacitors.

The circuit board assembly is, therefore, the driving force of most electronic products since it provides the channel through which electricity can pass to all components. There are two ways components can mount to the circuit boards. And most electro-mechanical assembly processes focus on the through-hole process.

In this process, each component comes with leads, which fit inside the through-holes of the circuit board.  These types of components are very old since the through-hole method has been used for a very long time.

Which One is Better?

In terms of cost, surface mount assembly is more cost-effective for a number of reasons. One of the reasons is that SMT components are much easier to find. Another reason is that there are many services that manufacture a surface-mounted printed board exactly to your specifications.

Not to mention, for the low price that it offers, it also provides better design quality and speed. Moreover, testing through-holes can be difficult and may require specialized testing equipment, which will, in turn, have you spend more on testing.

Final Words

Electronic assembly process techniques are sometimes integrated into the surface mount assembly process, depending on the product you deal with. Therefore, it is difficult to say whether one is better than the other because projects can vary vastly.

However, it is fair to say that the through-hole method is outdated and has more drawbacks than the surface mount technology.