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

About this list Date view Thread view Subject view Author view

From: Gregg Fokken (fokken.gregg@mayo.edu)
Date: Thu Nov 04 1999 - 09:34:48 PST


On Nov 4, 12:12pm, Laurence Michaels wrote:
> Subject: Re: [SI-LIST] : Recommendations for High Density PCB to PCB
Conne
> Mike Ventham wrote:
> >
> > Laurence,
> >
> > I still think you are having calculation problems.
> > Your answer was correct but
> >
> > 1 sq inch = 1000 mils * 1000 mils = 1000000 sq mil. NOT 10000 sq mil
> >(deleted )
> Ermm... No...
> 1 inch = 100 mils 1 sq inch = 10000 sq mils
> 1 meter = 1000 millimeter 1 sq meter = 1000000 sq millimeter.
>
> Contrary to SI prefixes, 1 mil isn't 1/1000 inch.
> It's 1/100 of an inch. That's one of the places I made a mistake.

According to Merriam Webster, every engineering book I own, and every board
vendor I've worked with, 1 mil = 1/1000 inch.

-- 
-------------------------------------------------------------------
Gregg Fokken                Internet(email):  fokken.gregg@mayo.edu
Mayo Foundation                       Phone:  (507) 284-5692
200 1st Street S.W.                     FAX:  (507) 284-9171
Rochester, MN  55905  

WWW: http://www.mayo.edu/sppdg/sppdg_home_page.html -------------------------------------------------------------------

**** 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 - 11:39:35 PST