Re: [SI-LIST] : different 4-layer board Stack up (S-P-G-S) ?

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From: David Instone (david_instone@uk.xyratex.com)
Date: Wed Mar 08 2000 - 01:55:56 PST


ajmani@us.ibm.com wrote:
.....snip....
> By the way, can someone enlighten me on how 0.062" came to be the standard
> board thickness.

Maybe because it's 1/16 inch? also pretty close to 16swg (not awg) and,
odd coincidence, 1.6mm.
I can remember pcbs with valve ( thermionic FETs?) sockets mounted on
them, you needed the rigidity then.

-- 
Regards

Dave Instone. Compliance Engineer Test Systems, MP24/22 Xyratex, Langstone Rd., Havant, Hampshire, P09 1SA, UK. Tel: +44 (0)23-92-496862 (direct line) Fax: +44 (0)23-92-496014 http://www.xyratex.com Tel: +44 (0)23-92-486363

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