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Reply To: | TechNet E-Mail Forum. |
Date: | Tue, 15 Dec 1998 17:52:14 -0500 |
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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
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