Get introduced to PCB assembly

Some of you may have heard the term PCB assembly and wondered what exactly that is. This post is meant to put some light on the subject. The entire process of manufacturing electronic devices is a long and complex one.  The commencing point of all electronics is in the material like silicon or any other semiconductor. Through various long and costly clean room procedures, these are transformed into electronic microprocessors and chips. 

These chips can’t do anything on their own, and requirement to be incorporated on a PCB to be able to do something eventually. 

Well, there are many companies that design these chips and sell final products. Nonetheless, these companies can’t afford to buy all the SMT AOI equipments necessary to assemble their chips onto PCBs to devise their final product. 

This is what PCB companies are there for. These companies have many surface mount assembly lines, and provide PCB assembly services to other companies who are not interested in doing this on their own. 

The PCB assembly process comprises of various procedures:

1. Solder paste printing- During this process, the initial solder paste is printed on the PCB utilizing a stencil. This is fundamentally the binding material of the devices to the PCB. 

2. SMT Pick & Place Assembly- This is the centre of every PCB assembly line. This procedure takes all the chips and precisely puts them on their designated place on the PCB. You can also use an AOI for PCB test. 

3. Reflow- Through-hole curing- After putting the chips on the solder paste, the boards go through a conveyor oven to melt the solder and bind the chips to the PCB.

Each of these procedures is a world in its own way and is considered a technology field whiles lead to the advent of the Inline AOI machine. 

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