Gold in keyboard?

**copycat** · 05-10-2012, 06:57 AM

sure looks like it. Or is it brass/copper? Took apart a very old keyboard and this is what I found.

**bejak** · 05-10-2012, 07:54 AM

Might also be some under the black dot on the board.

**waredu** · 05-10-2012, 07:56 AM

I'm pretty sure that's an IC chip under that black dot - not sure about any gold there.

**JPete** · 05-10-2012, 08:38 AM

Originally Posted by waredu

I'm pretty sure that's an IC chip under that black dot - not sure about any gold there.

I think that is COB (Chip On Board) with possible gold or aluminum wire bonding.
PDF has a diagram to explain.
www.fkdelvotec.at/files/press/COB_E2.pdf

**copycat** · 05-10-2012, 08:54 AM

should I peel that covering off?

**JPete** · 05-10-2012, 09:28 AM

I would leave it as is. Removing it also removes all the bonding wires.

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