Hi Kerry:
Kapton tape dielectric strength is several thousand volts, about
1 mil thick consistently, will outlast the board, comes in every width
needed. It is hard to beat that. I would use it.
Regards,
Ramon
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Gallegos, Luis A.
Sent: Monday, November 13, 2006 8:21 AM
To: [log in to unmask]
Subject: Re: [TN] Power Via Capping
Hi Kerry
How about Urethane, Acrylics or Epoxy as a conformal coat application.
Good luck
Sanmina-sci
Luis Gallegos
Process Engineer
8701 100th Street
Pleasant Prairie, WI 53158
Phone: 262 947-7700
Direct: 262 947-2765
Fax: 262 947-7728
e-mail: [log in to unmask]
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Kerry McMullen
Sent: Friday, November 10, 2006 3:11 PM
To: [log in to unmask]
Subject: [TN] Power Via Capping
Hello Esteemed Technet,
Ran into a little issue here. A board we have has 4 power via's (3.3,
5,
etc) directly under a device that was not supposed to have an grounded
exposed heatsink on the bottom side. The nasty result is the occasional
short where one of the power vias make contact to the heatsink. I
cannot drill out these vias as there is trace going from these vias
directly to the pins of the device.
I can use kapton tape to cover the vias, but I was looking for a better
solution.
No soldermasking allowed!
Any ideas?
Thanks in advance,
Kerry
Kerry McMullen
Principal New Product Mfg. Engineer
LTX Corporation
825 University Avenue
Norwood, MA 02062-2643
(T) 781-467-5468
(C) 508-631-1832
---------------------------------------------------
Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------
(F) 781-461-0993
________________________________________________________________________
_____
Scanned by Sanmina-SCI eShield
________________________________________________________________________
_____
CONFIDENTIALITY
This e-mail message and any attachments thereto, is intended only for
use by the addressee(s) named herein and may contain legally privileged
and/or confidential information. If you are not the intended recipient
of this e-mail message, you are hereby notified that any dissemination,
distribution or copying of this e-mail message, and any attachments
thereto, is strictly prohibited. If you have received this e-mail
message in error, please immediately notify the sender and permanently
delete the original and any copies of this email and any prints thereof.
ABSENT AN EXPRESS STATEMENT TO THE CONTRARY HEREINABOVE, THIS E-MAIL IS
NOT INTENDED AS A SUBSTITUTE FOR A WRITING. Notwithstanding the Uniform
Electronic Transactions Act or the applicability of any other law of
similar substance and effect, absent an express statement to the
contrary hereinabove, this e-mail message its contents, and any
attachments hereto are not intended to represent an offer or acceptance
to enter into a contract and are not otherwise intended to bind the
sender, Sanmina-SCI Corporation (or any of its subsidiaries), or any
other person or entity.
________________________________________________________________________
_____
Scanned by Sanmina-SCI eShield
________________________________________________________________________
_____
---------------------------------------------------
Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for
additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
|
