Re: [SI-LIST] : Recommendations for High Density PCB to PCB Connection

About this list Date view Thread view Subject view Author view

From: sweir (weirsp@a.crl.com)
Date: Wed Nov 03 1999 - 08:32:08 PST


Laurence,

I think your calculations are a bit off. 2.5E-3 inch square is 50mils on a
side. In this case 4 rows each of 10 connections per row, at 50mils
connection plus space.

Regards,

Steve.
At 09:47 AM 11/3/99 -0500, you wrote:
>Doug Piper wrote:
> >
> > I'm working on a new project that requires me to make 40 connections from
> > one PCB to another in a space that's only about 0.2" x 0.5". Does anyone
> > have any experience or recommendations for making a connection of this
> > density?
> >
> > Doug Piper, Woven Electronics, P.O. Box 189, Mauldin, SC 29662
> > PH 864-967-1751, FAX 864-963-1761, e-mail: doug.piper@wovenelectronics.com
> > www.wovenelectronics.com
>
>Only recommendation I can make, is possibly some of the press-fit
>unidirectionally conductive foam material, such as is used on some of
>the more recent Intel Flash chips.
>
>Having done a few calculations, this works out to 400 connections per
>square inch. If you manage to put more connections in an inch, than
>most cotton sheets, I want to know how you did it! Connections on the
>trace level are going to be tight as well. This is going to be 1
>connection per 2.5 square mils. Assuming equal trace and space
>requirements, this works out to 0.625 mil trace and space. That's not a
>standard PCB you're talking about. Are you sure about the space
>requirements?
>
>Best of luck,
>--
>Laurence Michaels
>
>**** To unsubscribe from si-list: send e-mail to
>majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE
>si-list, for more help, put HELP. si-list archives are accessible at
>http://www.qsl.net/wb6tpu/si-list ****

**** To unsubscribe from si-list: send e-mail to majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE si-list, for more help, put HELP. si-list archives are accessible at http://www.qsl.net/wb6tpu/si-list ****


About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Tue Feb 29 2000 - 11:39:33 PST