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Why PCB color is Black
Author hgping   Views 24   Posted at 2008/8/27 01:41  [View In Forum]
Hello Friends,lllgbjlc
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I am Manoj V , working as a internet security engineer. I have a doubt regarding Printed Circuit Board.lllgbjlc
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Why All the PCB's are in Green color ?lllgbjlc
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Reply No. Replier Total Replies 12   [View All Replies]  [New Reply] Replied at
1 wy830115 Those Green color are called soldermask.They are available in many colors including Green & black.


The purpose is to protect the Cu layer from corrosion and provide good insulation.
2008/8/27 01:41
2 netlgc Dindeds,





Thanks for your fast reply
2008/8/27 01:41
3 spacebac you can also have PCB's in Black or white color. the color of the board depends on the solder mask 2008/8/27 01:41
4 anuo2008 The solder mask could be yellow or red too. It depends on customer requirement.





Regards
2008/8/27 01:41
5 scuzt color never affect the performance of the PCB, it may be tradition! 2008/8/27 01:41
6 ken7976 Yes, solder mask is to avoid solder paste in between pads short together when pass through wave or reflow machine. Otherwise, the pcbA may damage due to short circuit when test by jigs.





On top of the solder mask, there is normally an addition white paint called silkscreen to print on it. ( Normally, critical areas e.g ic pads region, areas may easy to find short circuit ) The purpose is to give addition protection as well as shows reference designator number, pcb information etc.





According to latest European regulation they all MUST fullfil RoHS requirement.
2008/8/27 01:41
7 scuzt 2008/8/27 01:41
8 netlgc Hi,


You can have PCB's in many colors.


Thanks for all these information.
2008/8/27 01:41
9 htc2498 2008/8/27 01:41
10 booksir I got blue PCB, it's beautiful. 2008/8/27 01:41
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