Author Topic: What's the use of these golden pads on PCB?  (Read 1480 times)

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Offline onemilimeter

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What's the use of these golden pads on PCB?
« on: June 16, 2011, 07:09:25 am »
Recently I notice "golden pad with distributed holes" (as circled) on several product PCBs. What's the use of these pads? Thanks.
 

Offline johnmx

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Re: What's the use of these golden pads on PCB?
« Reply #1 on: June 16, 2011, 08:19:16 am »
Those are not pads but power traces. Normally they are used to spread the heat and/or conduct high current (very low ohmic trace).
Best regards,
johnmx
 

Offline hannobisschoff

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Re: What's the use of these golden pads on PCB?
« Reply #2 on: June 17, 2011, 09:31:15 pm »
So is that actual gold, or some sort of alloy?
 

Offline Psi

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Re: What's the use of these golden pads on PCB?
« Reply #3 on: June 17, 2011, 10:25:09 pm »
Probably just standard immersion gold.
Real gold, just very thin. I think it's only like 40 atoms thick but don't quote me.
Greek letter 'Psi' (not Pounds per Square Inch)
 


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