Heat Sink Glue-Which?

fmak · 12th February 2007, 07:55 AM

I need to reduce the tempaerature of a digital LSI chip which runs at 65 C.

Which kind of glue is suitable for gluing a heat sink on. Adhesive pads seem to loose adhesion at 60C or so.

Will cyanoacrylic glue do? The thing needs to be fail-safe.

AuroraB · 12th February 2007, 09:52 AM

You need a thermally conductive glue......

Look or search for Loctite "Output 384" ( that's the one I use, and the only one I know of right away.....)
It's a 2 part epoxy like glue, the glue in a large tube and a liquid accelerator... just follow the instructions carefully!
looks like the old white Araldite Rapide

AndrewT · 12th February 2007, 11:06 AM

Hi,
adhesive pad is far too thick for good thermal transfer.
even the glue on Sellotape is a bit on the thick side.

Cyanoacrylate (instant glue) is very thin when the too surfaces are genuinely flat. The thermal resistance of a very thin glued joint should be acceptable. If the joint faces are not quite flat then sufficient glue to exclude the air will perform adequately well.
But, squeeze the glue out with good finger pressure (watch static).

pinkmouse · 12th February 2007, 11:15 AM

I successfully added some heatsinking to logic chips in a cheapo DVD player that were overheating using cyanoacrylate. I'm not sure I would trust it though for anything that was dumping a lot of power like CPUs or output devices.

sorenj07 · 12th February 2007, 03:17 PM

Arctic Silver Ceramique (adhesive)

acenovelty · 12th February 2007, 05:05 PM

3M™ Scotch-Weld™ Epoxy Adhesive DP190

radtech · 12th February 2007, 09:50 PM

I wouldn't use cyanoacrylic on anything that gets very hot, that stuff gives off some nasty fumes... a little bit of smoke from it will feel like someone stuck a hot needle in your eye, and if it gets hot enough it can give off cyanide gas

jneutron · 12th February 2007, 09:58 PM

Tracon Bipax

ak_47_boy · 13th February 2007, 03:52 AM

Arctic Silver Thermal Adhesive. It has excellent thermal properties, its also like epoxy. This stuff is the best.

EdT · 13th February 2007, 05:18 PM

Make your own.

I use 5 minute epoxy mixed with 70% epoxy 30% zinc oxide or silver oxide CPU heatsink compound for faster cure times and a 60% epoxy 40% for better heat transfer, but slower cure time.

12th February 2007, 07:55 AM	#1
fmak diyAudio Member Join Date: May 2001 Location: London UK	Heat Sink Glue-Which? I need to reduce the tempaerature of a digital LSI chip which runs at 65 C. Which kind of glue is suitable for gluing a heat sink on. Adhesive pads seem to loose adhesion at 60C or so. Will cyanoacrylic glue do? The thing needs to be fail-safe.

12th February 2007, 11:06 AM	#3
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, adhesive pad is far too thick for good thermal transfer. even the glue on Sellotape is a bit on the thick side. Cyanoacrylate (instant glue) is very thin when the too surfaces are genuinely flat. The thermal resistance of a very thin glued joint should be acceptable. If the joint faces are not quite flat then sufficient glue to exclude the air will perform adequately well. But, squeeze the glue out with good finger pressure (watch static). __________________ regards Andrew T.

12th February 2007, 11:15 AM	#4
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	I successfully added some heatsinking to logic chips in a cheapo DVD player that were overheating using cyanoacrylate. I'm not sure I would trust it though for anything that was dumping a lot of power like CPUs or output devices. __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Heat sink and chokes FS	broadcast guy	Swap Meet	0	22nd November 2004 08:23 PM
Yet another heat sink problem	OliverD	Pass Labs	10	16th October 2003 06:29 AM
How much heat sink is necessary?	rosss	Pass Labs	11	23rd February 2003 06:23 AM


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

12th February 2007, 09:52 AM	#2
AuroraB diyAudio Member Join Date: May 2001 Location: Norway, -north of the moral circle..	You need a thermally conductive glue...... Look or search for Loctite "Output 384" ( that's the one I use, and the only one I know of right away.....) It's a 2 part epoxy like glue, the glue in a large tube and a liquid accelerator... just follow the instructions carefully! looks like the old white Araldite Rapide

12th February 2007, 03:17 PM	#5
sorenj07 diyAudio Member Join Date: May 2006	Arctic Silver Ceramique (adhesive)

12th February 2007, 09:50 PM	#7
radtech diyAudio Member Join Date: Dec 2006	I wouldn't use cyanoacrylic on anything that gets very hot, that stuff gives off some nasty fumes... a little bit of smoke from it will feel like someone stuck a hot needle in your eye, and if it gets hot enough it can give off cyanide gas

12th February 2007, 09:58 PM	#8
jneutron diyAudio Member Join Date: Jan 2004 Location: away	Tracon Bipax

13th February 2007, 03:52 AM	#9
ak_47_boy diyAudio Member Join Date: Sep 2006	Arctic Silver Thermal Adhesive. It has excellent thermal properties, its also like epoxy. This stuff is the best.

13th February 2007, 05:18 PM	#10
EdT diyAudio Member Join Date: Dec 2006	Make your own. I use 5 minute epoxy mixed with 70% epoxy 30% zinc oxide or silver oxide CPU heatsink compound for faster cure times and a 60% epoxy 40% for better heat transfer, but slower cure time.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read