TECHNET Archives

March 1998

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:
dielectric constant
From:
"Olson, Jack C" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 3 Mar 1998 09:21:15 -0800
Content-Type:
text/plain
Parts/Attachments:
text/plain (24 lines) 
WARNING: this is a very unexciting question...

My software does some basic signal integrity analysis,
and I just noticed it defaults the dielectric constant for
regular FR4 to 4.7

I was under the impression that most FR4 is at 4.2-4.3
these days (more resin? thinner cores? can't remember...)

Even a brief response will be appreciated!
                                                                Jack

################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe:   SUBSCRIBE TechNet <your full name>
To unsubscribe:   SIGNOFF TechNet 
################################################################
Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311
################################################################

ATOM RSS1 RSS2