Mime-Version: |
1.0 |
Sender: |
|
X-To: |
|
Date: |
Tue, 15 Dec 1998 17:52:14 -0500 |
Reply-To: |
|
Subject: |
|
From: |
|
Content-Transfer-Encoding: |
7bit |
Organization: |
Applied CAD Knowledge Inc. |
Content-Type: |
text/plain; charset=us-ascii |
Parts/Attachments: |
|
|
Ken Patel wrote:
>
> Hello Technetters,
> I have couple of questions for Entek coated boards I am running on sample
> basis.
> (1) Do I need to apply solder paste on mounting holes of Entek coated
> boards? These mounting holes will be used to fasten the board in a
> chassis. Give me your pros and cons.
We routinely see OSP users seeking testpads and Cu chassis
mounting surfaces to be pasted and reflowed. OSP residuals
apparently do not make for a good surface for electrical
contact, in spite of questionable flatness.
> (2) The boards do have press fit connectors. Do you think I will be OK
> with the Entek coating as connectors now will be making a contact
> with copper which will get oxidized. Any long term problem from
> reliability point of view. Can anyone suggest any test to find any
> long-term reliability problem because of press-fit connector going
> onto the bare copper?
Have seen the suggestion to use solder finished leads
since solder acts as a lubricant to the pressfit process.
Have not yet had to shepherd combination of pressfit and
OSP through to actual product myself (whew).
Good luck, and regards to all,
--
Jeff Seeger Applied CAD Knowledge Inc
Chief Technical Officer Tyngsboro, MA 01879
jseeger "at" appliedcad "dot" com 978 649 9800
################################################################
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's web site (http://www.ipc.org) "On-Line Services" section for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################
|
|
|