From: Neil <picdude3@narwani.org>
To: Microcontroller discussion list - Public. <piclist@mit.edu>
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Date: Wed, 3 Feb 2021 09:57:40 -0800
Subject: Re: [EE] Measuring PCB copper weight?
Thread-Topic: [EE] Measuring PCB copper weight?
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I have calipers w/0.01" resolution here, but not sure if that will be=20
accurate enough, especially with soldermask, which I'll have to scrape=20
off.  I can't measure pads as that will have a plating on it.
Google tells me that 1-oz is 1.4 mils thick, so I guess I could run out=20
and get a better caliper or micrometer for this.  Even harbor freight=20
calipers should be good enough for this I guess.



On 2/3/2021 11:54 AM, Clint Jay wrote:
> Micrometer? The thickness of the copper should be a giveaway
>
> On Wed, 3 Feb 2021, 16:01 Neil, <picdude3@narwani.org> wrote:
>
>> Is there a simplish way to figure out or measure the copper weight on an
>> existing PCB?
>>
>> I'm asking because I'm redoing a layout for someone and I did not do the
>> original circuit design, so was planning to use the same trace widths as
>> on the original board, but I'll need to know the copper weight to order
>> a prototype board.
>> If I have to redo the math on current etc, that opens up another can of
>> worms as I don't have all of the specs otherwise.
>> And the copper does feel thicker than usual.
>>
>> Thanks.
>>
>>
>>
>>
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