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johnorun
Joined: 04 Apr 2008
Posts: 3364
Location: Chicago, IL- US
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 Posted: Thu Jul 24, 2014 10:13 pm Post subject: Help to remove MCM heatsink |
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How do you remove these brittle metal heatsink sections from the dies underneath on this MCM chip? Moderate prying with a screwdriver doesn't budge anything.
I don't want to damage the dies, but these heatsinks are flush with the dies.
epoxy? superglue?
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CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
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johnorun
Joined: 04 Apr 2008
Posts: 3364
Location: Chicago, IL- US
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| Posted: Thu Jul 24, 2014 10:23 pm Post subject: |
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| CPUShack wrote: | | small propane torch and heat the heatspreaders evenly, then you can pry them off with a padded screwdriver |
Thanks John.
I've removed every type of heatsink except this type. Do you know what the bonding agent is made of? Does the heat loosen the dies at all?
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CPUShack
Joined: 16 Jun 2003
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Location: State of Jefferson, USA
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johnorun
Joined: 04 Apr 2008
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Location: Chicago, IL- US
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mavroxur
Joined: 06 Jul 2005
Posts: 1192
Location: Wichita Falls, TX
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| Posted: Fri Jul 25, 2014 4:44 pm Post subject: |
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| Would a heatgun not be safer? |
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Glory_Cloud
Joined: 24 Jul 2010
Posts: 2942
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| Posted: Fri Jul 25, 2014 5:07 pm Post subject: |
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You might need an industrial strength heat gun and not a simple
hair dryer I would imagine. |
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CPUShack
Joined: 16 Jun 2003
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johnorun
Joined: 04 Apr 2008
Posts: 3364
Location: Chicago, IL- US
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| Posted: Sat Jul 26, 2014 1:17 am Post subject: |
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| CPUShack wrote: | | yah its gotta be hot, I havent had a prob with propane |
I heated up the heatsinks with a propane torch and twisted with a screwdriver blade to pop them off, one by one. Next I scraped the hard film off of the silicon chip surfaces with a box cutter blade while the chip was still hot.
I don't think any heat-gun would have worked on these MCMs since the mass of the ceramic package absorbed so much heat.
Next I cleaned off the grey putty-like thermal paste from the entire ceramic surface with mineral spirits and an old toothbrush and rag. Finally, I cleaned the remaining tough film off the silicon with some fine steel wool. The super hard thermal compound surrounding each chip die seems impossible to remove without damaging the silicon.
It was hard work, but the result is the clean exposed chips below...
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CPUShack
Joined: 16 Jun 2003
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aberco
Joined: 05 Sep 2013
Posts: 2655
Location: Paris France
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| Posted: Sat Jul 26, 2014 1:40 am Post subject: |
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Nice Power4 MCMs!
| Quote: | | Next I scraped the hard film off of the silicon chip surfaces with a box cutter blade while the chip was still hot. |
I had to do that while hot as well on my Power4 and Power4+ single chip CPUs, otherwise that white stuff is really hard. |
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Vegeta
Joined: 13 Apr 2013
Posts: 7049
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| Posted: Sat Jul 26, 2014 2:00 am Post subject: |
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Good job! Nice MCMs! I'm afraid my MCM heat  You have spare?
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johnorun
Joined: 04 Apr 2008
Posts: 3364
Location: Chicago, IL- US
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| Posted: Sat Jul 26, 2014 2:31 am Post subject: |
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| Vegeta wrote: | | Good job! Nice MCMs! I'm afraid my MCM heat You have spare? |
I will sell the two spares in the top row. Some chips on edges or corners, but the dies are in perfect condition. PM if interested.
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Glory_Cloud
Joined: 24 Jul 2010
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| Posted: Sat Jul 26, 2014 10:42 am Post subject: |
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| Great job! They look awesome! |
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Vlasta
Joined: 15 May 2012
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