TECHNET Archives

April 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:
An Gielen <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 24 Apr 2003 03:53:23 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (31 lines)
Hello,
Not so long ago I posted a question about via-filling.
I think I have to be a bit more precise.
I'm looking for every possible information I can find about filling (micro-)
vias in build-up PCB's.
More precise: vias in surface-mount pads (via-in-pad), blind vias, burried
vias and stacked vias, with sizes from 50 micron (or less) up to 250 micron.
These via-holes can be filled by resin, polymers(concuctive or non-
concuctive), plated (dc or pulse), screenprinted,...
You also have more exotic ways like first pattern-plating then epoxy-
coating followed by polishing (via post).

What I am interested in, is the practice. Is this common used in PCB-
fabriction? Which process is used the most? Why do they fill ( there are
many benefits)? What is your opinion , out there in the real world?

Thank you
Regards
An

---------------------------------------------------
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