TECHNET Archives

August 2001

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:
Mike Fenner <[log in to unmask]>
Reply To:
Date:
Wed, 15 Aug 2001 15:29:45 +0100
Content-Type:
text/plain
Parts/Attachments:
text/plain (67 lines)
The conductivity of these things is low compared to metal but higher than
air so the answer is as little as possible. Or said another way just enough
to give good thermal coupling (fill in the gaps) but not so much that you
increase the thermal gradient by substituting a low conductor for the metal
contact.
How much is just enough? as much as it takes to just become visible all
round perimeter when clamped.

I'm sure any standards and procedures people could write this up into an
impressive looking ISO style 20 step  instruction which should floor anybody
and solve this for you ...... ?
Alternatively there are better products these days than grease. I thought
phase change stuff had wiped out greases?

Mike Fenner
Indium Corporation of Europe
T: + 44 1908 580 400
F: + 44 1908 580 411
M: + 44 7810 526 317
W: www.indium.com


-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Phil Nutting
Sent: Tuesday, August 14, 2001 4:42 PM
To: [log in to unmask]
Subject: [TN] Application of Thermal Grease


We use many TO-220 and TO-247 packages mounted to heatsinks.  Some of
these applications require the use of thermal grease.  The age old
question is how much grease is enough?  This is a political football
that is constantly tossed around.  Does anyone know of a manufacturer's
specification or some organization's standard that clearly defines how
much thermal grease is the correct amount?

Thanks,

Phil Nutting
Manufacturing Engineer
Kaiser Systems, Inc.

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

ATOM RSS1 RSS2