 
| Received: |
by ipc.org (Smail3.1.28.1 #2)
id m0ujT9D-0000UFC; Thu, 25 Jul 96 11:20 CDT |
| Content-Type: |
text/plain; charset="us-ascii" |
| Old-Return-Path: |
|
| From [log in to unmask] Thu Jul 25 13: |
18:43 1996 |
| Precedence: |
list |
| Resent-From: |
|
| Message-ID: |
|
| Content-Transfer-Encoding: |
quoted-printable |
| Status: |
O |
| X-Mailing-List: |
|
| TO: |
|
| Return-Path: |
<TechNet-request> |
| X-Status: |
|
| Resent-Message-ID: |
<"oNiaP2.0.TkO.6xvzn"@ipc> |
| Subject: |
|
| From: |
|
| X-Loop: |
|
| Resent-Sender: |
|
| MIME-Version: |
1.0 |
| Date: |
Wed, 24 Jul 1996 10:24:26 +0800 |
| Parts/Attachments: |
|
|
Could anybody help explain the retionale behind the "exposed copper" specification? Why would any amount be rejectable for high-reliability applications? I can understand that for specific applications (e.g.: flex circuits that go inside an HDD), loose copper oxide can permanently damage the media surface. But for most other applications, such sensitivity does not exist.
-Luke Mendoza-
Electronic Assemblies Inc.
----------
From: [log in to unmask][SMTP:[log in to unmask]]
Sent: Wednesday, July 24, 1996 1:44 AM
To: [log in to unmask]
Cc: [log in to unmask]
Subject: Re: Exposed copper
Darrell
It seem that there is some confusion between SOLDER coverage and SOLDERMASK
coverage. IPC-RB-276, the bare board spec, allows exposed copper (copper
that is not covered with solder) along the vertical edges and 1% of the other
conductor surface that is not covered with soldermask or meant to be
soldered. The same specification, IPC-RB-276 Amend. 1, does not allow voids
...<snipped>...
***************************************************************************
* 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. *
***************************************************************************
|
|
|
