PCB Assembly And Fabrication At Pcbnet

If you’re looking for a PCB manufacturer that offers quality products, competitive pricing and quick turnaround, you have arrived at the right place. With the combination of highly skilled labor force and state-of-the-art equipment, we, at PCBnet, can consistently produce products of the finest quality that customers can expect from an Assembly/PCB industry leader.

History of PCB

PCB AssemblyIn the mid-1930s, an Austrian engineer named Paul Eisler invented the printed circuit board while he was designing radio sets. Not long after, those radios were vastly used in the United States during World War II. After that event, the application and use of PCBs became commercial especially in the electronics industry.

The circuit boards have no significant use until you solder electronic components onto it. The components can either be SMD or thru-hole. Hence, manufacturers can either employ SMT (surface mount technology) or thru-hole technology, depending on the type of device being used.

Materials Needed for PCB Assembly

• Printed Circuit Board (PCB)

• Electronic Components

• Solder Flux

• Soldering Tools (solder paste, solder wire, solder preforms, solder bar, etc.)

• Soldering Equipment (SMT equipment, wave-soldering machine, soldering station, inspection equipment, testing equipment, etc.)

After gathering all the above materials arranged, you may begin the PCB assembly process. You may contact us at PCBNet for a more comprehensive and suitable assembly approach.

PCB Assembly Process

There are several stages involved in the PCBA process, including, but not limited to:

• Solder Paste Application

Pcb fabricationSolder paste is applied to the areas of the circuit board where soldering is required. Traditional way to this is with a solder screen through which the paste is dispensed and applied onto the component pads. A modern solder paste application method involves jetting technology that allows the paste buildup of small dots to reach the proper and exact amount for each pad. This non-contact method is far more advantageous compared to traditional paste dispensing method.

• Pick and Place

During the pick and place stage, a machine filled with reels picks each component up and places it on the proper position on the PCB. The components are held in that place by the tension brought about by the solder paste.

• Soldering

You can choose from different soldering methods. One is wave soldering wherein the solder paste application is no longer necessary since the soldering agent is already provided by the machine. However, the most commonly used method now is the reflow soldering method which uses an oven with extremely high temperature that melts and turns the paste into liquid metal.

• Inspection

The boards must undergo inspection to ensure there are no defects and the quality is maintained. An automatic optical inspection machine is used to inspect surface mount PCBs that has a hundred components or more. This machine is able to detect misplaced or incorrect components and poor solder joints.

• Testing

Testing is necessary in all PCBA process. This guarantees that the boards are properly functioning and can work effectively with the external world. Different testing methods can be employed, such as Rigid Needle, CT scanning and Bed of Nails testing method.

Surface Mount Technology

SMT or Surface Mount Device is an assembly process used for SMD (surface mount device) electronic components. These components do not have legs or heads and are mounted onto the board’s surface. The electronic components, equipment and other soldering tools used in this process differ from those used in thru-hole soldering method.

PCB Fabrication

PCBPCBnet offers most types of boards, including Multi-Layer and Flex PCBs. If you got metal, we also have exotic PCB substrates such as Nelco, Arlon and Aluminum Core PCBs. You may contact us for a quote for Aluminum, Flex or other substrates you need. Through our highly functional website, you can also get your requested quote within minutes with the help of our Full Turn Key online quote engine. We are the first to provide this feature in our attempt to make the process easier, faster and more convenient for all our clients.

Alternatively, you may get your quote by sending us the following details:

• Bill of Materials (BOM)

• Gerber Files or Assembly Drawing

• Pick and Place Data

• Quantity and Desired Lead Time

• Sample

• PCB (if not ordered through pbc.net)

One of our friendly procurement specialists will contact you shortly after you send the quote order. We will send you your TurnKey quote within the same day if it’s received before 11 a.m. CST. With one easy-to-use online quote system, you can get parts and PCBA labor conveniently in one place!

Why PCBNet?

Printed circuit boardsWe are committed to fulfilling our customer’s PCB requirements with an excellent turnaround time. We employ a highly experienced and skilled team of passionate individuals to produce the highest level of product quality that your project requires, at the most unbeatable prices in the industry.

Our assembly capabilities include: SMT, Thru-hole, Flip Chip, cable assembly, Flex circuit assembly, Wire Harness assembly and Pb-free assembly, among others. We’re also capable of: 22-layer fabrication, 3 mil line-width and spacing, PCB thickness of up to .300 inches, 6 ounces of copper, and more. PCBnet utilizes first-class equipment and tools in a more organized manner, enabling us to produce high quality products you can always depend on.

Origin Of Custom Coins In The Military And How They Are Used Today

In recent years, custom coins have become more common in both military and private sectors. It all started as a military tradition and then grew into something with wider reach.


Now, why are these custom coins also called challenge coins and what do they do? According to a well-known legend, it is said that challenge coin originated in the US Air Force during World War I. A wealthy lieutenant ordered custom-made medallions for every member of his unit. The medallions had their insignia, which is a symbol of their unit and identity. Not long after, one of the pilots of this unit was shot down and was captured by the Germans. The Germans stripped him off his uniform, forced him to wear civilian clothes, and took all his identifications. However, they left the medallion with him, which he carried in a small pouch around his neck.

custom military coins

Luckily, the pilot escaped, and was able to make his way to a French post. Since he does not have any identification anymore, he was suspected to be a German spy. He was then captured again and sentenced to die. When he was about to be executed, he showed his medallion and the French recognized the symbol printed on it. He proved that he was not a spy, but rather an American ally. Soon enough, he was reunited with his unit. Although there was no proof that these events actually happen, it is still a great bar tale, which is why it is a well-known legend.

Custom Coins in the Military

That legend was the beginning when these coins have become common in every branch of the United States military. Each of the division or branch has their own custom design. Now, you might ask why these coins are also called challenge coins. You may be wondering where the “challenge” came from.

In the military tradition, a soldier can challenge other soldier or soldiers at any time, particularly when they are at a military bar. This challenge could be voiced out or simply made by slapping the coin down on a bar or table. Every soldier who is challenged must present their challenge coin immediately. Those who do not have their coin with them will pay for the next round of drinks. However, if everyone was able to show their coins, the challenger is the one going to pay.

Custom Challenge Coins in Other Organizations

These coins have also made their way to other organizations that have a quasi-military structure like the firefighters and police departments. Their coins represent a unique bond among the members of these organizations based on their sacrifices to save people as well as their common experiences.

custom challenge coins

Businesses also use these coins to help boost the morale of their employees, specifically in circumstances when they use these coins as awards to recognize their achievements. For instance, the coins can be given to carefully selected people to honor them for having a remarkable performance like meeting the sales goals. Businesses can also use these coins for company-wide projects, such as promotional campaigns.

Collecting Challenge Coins

As mentioned, these coins have been common not just in the military, but also among private groups. Some servicemen, past and present, and also ordinary people like to have their coins as mementos and collect them.


While these coins are traditionally round, the manufacturers herewww.challengecoins4less.com you can get best options for other shapes you want. However, keep in mind that round coins usually have the biggest area for a certain price. Aside from shapes, you can also choose from various sizes, custom cut edges, 3D designs, sequential numbering, cutouts, antiquing effects, etc. You can also opt to have your custom challenge coins as dog tags, keychains, and even bottle openers. That way, they are not just an ornament or keepsake, but they can also serve other functions. You also choose from various metals, such as copper, bronze, silver, gold, black nickel, or duo-tone metal.

Custom Coins

Over the years, custom coins have shown that they have become popular in other organizations and are not exclusive for the military. Because of the durability, uniqueness, and beauty of these coins, they appeal to many non-profit organizations, business, and other government and private groups.