Hi Mike! Tungsten/copper alloys are used as base metals with additional
plating finishes (such as gold/nickel) in a number of industry wide
applications. We have a couple of applications within Collins which are WCu
with a gold/nickel finish.  WCu alloys do not always behave "well" but many
plating chemistry suppliers have preparation methods and plating
chemistries which should meet your needs. Contact your plating chemistry
suppliers for assistance. Good Luck.

Dave Hillman
Rockwell Collins
[log in to unmask]





"Mcmaster, Michael" <[log in to unmask]>@ipc.org> on 09/25/2001 12:06:01 PM

Please respond to "TechNet E-Mail Forum." <[log in to unmask]>

Sent by:  TechNet <[log in to unmask]>


To:   [log in to unmask]
cc:

Subject:  [TN] Tungsten-Copper Heat Sinks


I am looking for a source for some custom-designed 85% tungsten/15% copper
heat sinks to be soldered to a circuit board.  The pieces are small
(0.75"x0.75") and thin (0.062").  I'm familiar with using copper in these
types of applications but not WCu.  For Cu we typically have the heat sink
plated with nickel-gold.  Can I do the same thing with a WCu piece or do I
need "special" plating processes?  Does anyone have any recommendations,
advice, warnings?

Thanks.
Mike McMaster
RF Product Engineer
Merix Corporation
Forest Grove OR
503-992-4263

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

Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
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 delivery of Technet send the following message: SET
Technet NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases >
E-mail 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
---------------------------------------------------------------------------------

---------------------------------------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
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 delivery of Technet send the following message: SET Technet NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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
---------------------------------------------------------------------------------