TECHNET Archives

1996

TechNet@IPC.ORG
Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
DES: 1/2 OZ. vs 1 OZ. Cu
From:
Jim Marsico 516-595-5879 <[log in to unmask]>
Date:
Thu, 31 Oct 1996 14:08:00 -0500 (EST)
Content-Type:
TEXT/PLAIN
Parts/Attachments:
TEXT/PLAIN (34 lines) 
We have a military contract that requires conformance to Mil STD 275, which is 
now at least 12 years old. We would like to design  some complex SMT 8 layer 
PCBs with 1/2 oz copper  signal layers for all the good reasons of accurate 
fine line width control, predictable impedance, etc. The old MIL Std 275 will 
only permit  1 oz copper. The customer will permit the use of 1/2 oz copper if 
we can show military programs usage with qual test data to back up the claim 
that 1/2 oz is not prone to any reliability problems (cracks, etc.).

Can any one help me with Mil programs and test data?

Jim Marsico
(516) 595-5879
[log in to unmask]
		
              ********************************
	      *	      ______   _   _  _____  *
	      *	     / ___  | | | | | _____  *
   	      *	    / /___| | | | | | _____  *
	      *	 __/  ____  | | | | |______  * 
	      * |____/    |_| |_| |________| *
	      *				     *
	      *	        SYSTEMS, INC.	     *
	      ********************************				       


***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To unsubscribe from this list at any time, send a message to:           *
* [log in to unmask] with <subject: unsubscribe> and no text.        *
***************************************************************************

ATOM RSS1 RSS2