Sender: |
|
X-To: |
|
Date: |
Wed, 4 Mar 1998 06:56:28 -0800 |
Reply-To: |
|
Subject: |
|
From: |
|
Content-Transfer-Encoding: |
7bit |
Content-Type: |
text/plain; charset=us-ascii |
Organization: |
Save The Planet |
MIME-Version: |
1.0 |
Parts/Attachments: |
|
|
Jack;
We use 4.2 if was closer to the stuff we were using
-
Lou Dallara Techno Visionary
"We have it in our power to begin the world again."
-Thomas Paine, Common Sense (1776)
http://www.waterw.com/~ldallara/pcb_index.html
Olson, Jack C wrote:
>
> 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
>
> ################################################################
> DesignerCouncil 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 DesignerCouncil <your full name>
> To unsubscribe: SIGNOFF DesignerCouncil
> ################################################################
> 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
> ################################################################
-
################################################################
DesignerCouncil 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 DesignerCouncil <your full name>
To unsubscribe: SIGNOFF DesignerCouncil
################################################################
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
################################################################
|
|
|