 
| Received: |
by ipc.org (Smail3.1.28.1 #2)
id m0wmPsJ-000BjYC; Thu, 10 Jul 97 15:31 CDT |
| Old-Return-Path: |
|
| Date: |
Thu, 10 Jul 1997 16:42:18 -0400 (EDT) |
| Precedence: |
list |
| Resent-From: |
|
| Message-ID: |
|
| X-Status: |
|
| Status: |
O |
| >From willli Thu Jul 10 15: |
31:59 1997 |
| TO: |
|
| Return-Path: |
<TechNet-request> |
| From [log in to unmask] Mon Jul 14 08: |
34:28 1997 |
| Resent-Message-ID: |
<"AF1TA1.0.XLF.fQKnp"@ipc> |
| Subject: |
|
| From: |
|
| X-Loop: |
|
| X-Mailing-List: |
|
| Resent-Sender: |
|
| Parts/Attachments: |
|
|
The answer to your question is: It depends. Sorry that is not very helpful,
but reflects the fact that the construction (number of layers, thickness,
hole diameter, etc.) and material (CTE, Tg, etc.) of the PCB have a
significant impact. Five reflow cycles is sort of a rough number where some
PCBs have started to fail. I do not know why you have included joints (solder
joints?) in this question.
Werner Engelmaier
Engelmaier Associates, Inc.
Electronic Packaging, Interconnection and Reliability Consulting
23 Gunther Street
Mendham, NJ 07945 USA
Phone & Fax: 973-543-2747
E-mail: [log in to unmask]
***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To subscribe/unsubscribe send a message <to: [log in to unmask]> *
* with <subject: subscribe/unsubscribe> and no text in the body. *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] *
***************************************************************************
|
|
|
