Heatsink glue

[yanz]

What do you use to glue the heatsink?

I always wonder what you use to attach the heatsink to the mosfet or chips. I was thinking it would be arctic silver adhesive or something but such those thing are not exist in my area.

When I went to electronic shop they said you need silicone grease but it is not adhesive, the heatsink always be screwed to the mosfet. "Heatsink" is not ordinary term there, it called "cooler".

So it just like I gave up for years. I relay on better airflow and direct fan to the hot area in the case to cool them.

Now, -- actually last week, I found this:








-> Shin Etsu Silicone Grease


And so, the over crazy heatsink maniac in me started... look what I've done, even I glued a huge duron heatsink to the cheapo geforce 2mx graphic card... I won't need those extra low noise fans anymore... (Inhause and exhaust case fans still needed).








Now I have a new habit: touching those heatsink with my bare fingers to feel if they hot or just warm. They are actually just warm, never geet too hot like before. The chip on hdd used to burn my finger after 10 seconds, now they won't. So if I find another hot spot, I'll kill it with my heatsink + shin etsu. Watch out, heat!










I try it with old hdd:

[willawake]

Re: Heatsink glue

thats the real stuff . they oem for cooler master, akasa etc.

[Spacedye69]

Re: Heatsink glue

On other forums, they recomend 2 part epoxy and arctic silver mix. Has anyone tried this?

[tiresias]

Re: Heatsink glue

thats the real stuff . they oem for cooler master, akasa etc.

Yes indeed, a matter of pride too it seems - I have a tube here of "Cooler Master Premium Thermal Compound" that has "Shin Etsu" written all over it.

I've found it to be quite effective, albeit with two major drawbacks when compared to the "classic" Arctic Silver 5, namely that it's considerably more expensive (gramwise), and that the paste is so absurdly viscous that spreading it thinly is a real chore!

PS. Some serious heatsinking on that hard disk, Yanz . Planning to overclock its logic chips, are you?

[Topcat]

Re: Heatsink glue

JB Weld works wonders for attaching heatsinks to FET's. See my Iwill DVD266u-RN thread in custom mods and revisions...

[MD Willington]

Re: Heatsink glue

I have Thermattach engineering samples, works ok...

[Galvanized]

Re: Heatsink glue

TY yanz, product noted and will be bought when located here in The States. If it works better than thermal tape and permits removal/clean up for RMA or resale it will be a must have.

@willawake/tiresias, G-749 is quite viscous and has been replaced by G-751-1 in the Shin-Etsu product line-up. The CM PTK-001 and maybe Akasa TIM is a blend of G-749 and thinning agents. Here's Shin-Etsu's faq on silicone thinning http://www.silicone.jp/e/products/oil/faq/faq002.html
The newer instruction from Artic Silver is to place a rice sized dot in the center of the CPU, then install the HS. It's stated that this will keep air bubbles/pockets from being trapped between the two. I have a P4 2.8 that's concave by 0.002" and takes a bit more TIM than a dead flat chip. My trick is to warm the HS with a hair dryer/heat gun to about 70C, then install it with a lightly gloved hand. This heats the TIM, permitting it to squish with greater speed. It might open the pores of the sink but that's putting too fine a point on it.

The must use for Shin-Etsu freaks is X23-7783D. Don't let Google put a space between the X and 23 as HSs will come up.

@Topcat, Did read your thread covering the use of JB Weld. If you say it's VG at heat transfer and has no capacitance, I will believe it for sure. Old mechanics take a dim view of JB because of it's use for Mickey Mouse ?repairs?. (Devcon is US Navy certed for repair work )

@Spacedye69. Yes, I tried a blend of AS Silver Epoxy 70% & AS-5 TIM 30%. After letting the FET sinks set over night, a light tug would pull them off. If I had stessed the board to warm them up, it might have been OK. All was cleaned and AS Alumina Epoxy was used for mounting.
Next time I just might go with the product yanz posted.

[yanz]

Re: Heatsink glue

PS. Some serious heatsinking on that hard disk, Yanz . Planning to overclock its logic chips, are you?

if only that is possible but that would be overspin, i guess?

On other forums, they recomend 2 part epoxy and arctic silver mix. Has anyone tried this?

i mixed them with aerocool silver grease (25% silver).

If it works better than thermal tape and permits removal/clean up for RMA or resale it will be a must have.

Well i'm not sure if it's better than termal tape, but i guess it is. Removal is not difficult once you re-heat the chip/mosfet. Pull the heatsink to some force level, and it will be pulled out. The glue when cold turn out into something like rubber, it's easily to remove even with your fingernail, but of course try alcohol or something else that more proper to clean it up.

Now my next problem is to search some small enough heatsinks.. That's difficult, or else i have to cut it from the bigger ones..

[triplelatte]

Re: Heatsink glue

Did you try BGA heatsinks, They work real good for me on my mosfets. I have been using artic silver 2 part thermal epoxey for 3 or 4 years now and never had a HS fall off ( one is a VIA mini ITX EPIA in my car for Navigation, DVD's and light computer work i.e. mobile internet borrowing )

[WeStSiDePLaYa]

Re: Heatsink glue

hey dude,

sorry to burst your bubble.

but that stuff is NOT very thermal conductive, in fact, its made to be an INSULATOR. just because something is shin etsu does NOT mean it has good thermal conductivity.

if you read up on that product you will see that is one of the last things you want to use as a TIM.

i think you might have just f*cked some of your stuff dude, because that will be a b*tch to scrap off.



if you want something easy, put TIM on middle of component, and very small dabs of superglue in corners.




http://www.silicone.jp/e/products/index.html

[larrymoencurly]

Re: Heatsink glue

Silicone rubber sealer is fine for smaller heatsinks and sticks better and resists heat flow less. One advantage of it over epoxy is that it's soft and can be cut off with a razor.

[yanz]

Re: Heatsink glue

@WeStSiDePLaYa, yea you're right. this is what i get from the site: http://www.silicone.jp/e/products/index.html

KE45
Uses: Adhesion, seal, and coating use, Electric insulated seal use

but that stuff is NOT very thermal conductive,

i find that it's not bad at all, while yes it's not very conductive, it does it jobs "perfectly". The PCB (back) is cool/only warm, very very much different from before i put the heatsink and that KE45 Shin Etsu. that's true for either vga card or motherboard.

you may read my post again that said i mixed it with silvery grease (25% silver, aerocool product) of 50% : 50%.

if you want something easy, put TIM on middle of component, and very small dabs of superglue in corners.

i've done something like that, and wont reapeat that again, why? because that makes the heatsinks hard to remove, unless i remove them with brutal forces. my shinetsu is better, but thanks for your warning.

i think you might have just f*cked some of your stuff dude, because that will be a b*tch to scrap off.

it's very easy to clean, somehow it's just like snake skin if you pull it. it's not powdery like artic silver. my final opinion, i wont reccomend this product as West found that its purpose is not for heat transfer, but for coating, seal, and electric insulation. my bad and mistake that i didn't research about the product first. for that, i thank you, West

however, i found it better than just a glue (or superglue). after all it made from silicone, it suppose to be better. i concur in what larrymoencurly said:

Silicone rubber sealer is fine for smaller heatsinks and sticks better and resists heat flow less. One advantage of it over epoxy is that it's soft and can be cut off with a razor.