TECHNET Archives

May 2003

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
"Jack C. Olson" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 20 May 2003 09:52:29 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (27 lines)
We have several designs in prototype that we have been experimenting with
Immersion Silver. Good results as far as assembly goes, but I just got into
a discussion with the In-Circuit Test guy, and he is worried. He is used to
having a nice soft mound of HASL solder to press his probes into (woo!),
and now we are taking that away. After two reflows I'm not even sure if
there is any silver left, are we giving him hard flat bare copper for
contact surface? Have any of you had problems probing vias with no solder
on them? The same for OSP, I haven't heard of ICT problems once that
coating is gone and you have exposed copper. Should we paste our vias and
test points with a modified screen? (Seemed like an easy solution to me,
but our process guy looked at me like I was crazy). So, do we have a
problem or do we just need another type of probe tip or something? All
comments gratefully appreciated...

Jack

---------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------

ATOM RSS1 RSS2