[SI-LIST] Re: High Temp PCB Material
- From: Hal Murray <hmurray@xxxxxxxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Sun, 15 Apr 2007 01:23:08 -0700
> Can anyone suggest a PCB material that can stand up to high
> temperatures (175C) better than FR4? We are currently using small
> double sided boards 50mm x 50mm with a thickness of about 1.6mm, and a
> through hole socket attached to perform hand testing on discrete
> semiconductors.
> The problem occurs when we want to test the part to automotive
> specifications and apply a temperature of 175C. This small pcb starts
> to warp and then we lose contact to the pogo pins. I do not have much
> room to increase the thickness of the board because of the length of
> the test socket leads. Any suggestions on alternate materials?
Another option would be to add some stiffening bars so the card doesn't warp.
They used to be a common trick on large boards, both to avoid warp and to
help power distribution.
There might be some way to clamp your current boards so they can't warp. Or
glue on some stiffeners.
--
These are my opinions, not necessarily my employer's. I hate spam.
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