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About soppcb

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Biography:
PCB FABRICATION and PCBA ASSEMBLY
Location:
shenzhen, CN
Interests:
PCB FABRICATION, PCBA ASSEMBLY
Occupation:
PCB and PCBA MANUFACTURER

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View soppcb's Blog

Recent Entries

Double Layer PCB Board Manufacturing

by soppcb on 30th July 2012 at 08:17
The manufacturing process of DOUBLE LAYER PCB BOARD



1 Plot negative film ( photo-plot the negative drawing );



2 Cutting the copper clad laminate ( keep20mmbreak-tab )



3 Drilling hole ( LAMINATE thickness is2.0mm, from drilling bit point to LAMINATE is 1.0-1.5mm, from the smallest drill hole to the biggest drill hole diameter in sequence );



4 Brush and Polish the DOUBLE

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Pcb clone

by soppcb on 30th July 2012 at 08:15
PCB Reverse Engineering, also known as PCB CLONE or PCB Copy, is using clone technology onto the PCB which was designed and manufactured by others, it is to use PCB related software to copy someone else’s circuit board and then manufacture the circuit board by yourself. This is the tradditional explanation for the PCB Clone. with the PCB CLONE technology development, the impact and scope of this industry continues to expand rapidly, and the definition of PCB CLONE also extend from the narrow sense

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Introduction of Flexible Circuit Assembly

by soppcb on 30th July 2012 at 08:13
Flexible circuits offer some unique challenges to the assembly process. The assembly materials and processes for populating and interconnecting components to a flexible circuit range are essentially identical to those used for standard rigid or rigid flex pcb, but there are some twists required, as will be shown. The assembly processes range from very simple methods, such as manual component insertion and hand soldering (which requires little or no fixturing), to fully automated methods, which normally

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PCB layout designer rules-----Welcome your supplement!!!

by soppcb on 6th April 2012 at 08:03
1.) seperate the power grounds, signal grounds, analog grounds, digital grounds, control grounds
2.) Keep inputs and outputs seperated and isolate to prevent oscillations
3.) Oscillation can happen from the inverting input and non-ineverting input of op-amps, coupling between parallel signal traces
4.) Place Capacitors that bypass supply voltages or decouple very close to the IC chip pins
5.) Use VIAS for signal grounds
6.) Keep power and ground track/traces

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pcb knowledge-3(Solderability Test Experiment)

by soppcb on 30th March 2012 at 08:47
As is well known, solderability is very important for the printed circuit boards, we must do solderability test of each batch PCB we made. In this way we can inspect the weldability of the PCB before we go ahead the assembly process, much helpful for SMT.

Today we are going to discuss the solderability test experiment. In order to explain it more clear, we now do a simple solderability test and show you all the steps.

1. Take a small solder pot, plug in the power,

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