 
| Received: |
by ipc.org (Smail3.1.28.1 #2)
id m0v5aef-0000SbC; Tue, 24 Sep 96 11:48 CDT |
| Old-Return-Path: |
|
| Date: |
Tue, 24 Sep 96 10:10:24 EST |
| Precedence: |
list |
| Resent-From: |
|
| Resent-Sender: |
|
| X-Status: |
|
| Status: |
O |
| X-Mailing-List: |
|
| TO: |
|
| Return-Path: |
<TechNet-request> |
| Resent-Message-ID: |
<"c56Qf3.0.2mC.G31Io"@ipc> |
| Subject: |
|
| From: |
|
| From [log in to unmask] Wed Sep 25 10: |
46:54 1996 |
| X-Loop: |
|
| Message-Id: |
|
| Parts/Attachments: |
|
|
I have a customer who is asking for 60-90 Ohms (single ended) on
a card bus PCB that has the same parameters as a 6 lyr PCMCIA at
.020 thk max. The specified trace requirements also recommend a
prop delay of 150-190 ps/In (Tpd). Modeling this little jewel leads
one into PTFE type Er. However, the Tpd drops below recommendations.
Using FR-4 type materials drops the linewidth down into micro
miniature ranges.
Has anybody else encountered such a requirement?
Is this a realistic requirement?
Any and all replies will be greatly appreciated.
Dave Hoover (Groovy)
***************************************************************************
* 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. *
***************************************************************************
|
|
|
