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qubitz
Joined: 13 Oct 2009
Posts: 53
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 Posted: Sun Dec 20, 2009 6:23 pm Post subject: Cleaning Chips |
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I've got an old chip that was taped into a socket. I've taken it out of the socket, and now I'm trying to figure out how to clean the tape off of the chip.
Any suggestions? |
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Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
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| Posted: Sun Dec 20, 2009 6:44 pm Post subject: |
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very nice MOS MCS 6502 you have there 
Quite a late date (Week 02 1977) for a white ceramic from memory 
best way i found to remove tape like that is to soak the whole chip in a container of Denatured alcohol (called Methylated Spirits here)
this might help to show what i mean http://en.wikipedia.org/wiki/Denatured_alcohol
This liquid has no oil in it.. so doesnt stain the chips. Also it does not affect the print on gold or silver finishes.
Just soak in a shallow container with a lid (so the liquid doesnt evavorate) till the tape starts lifting off.
Only thing is be careful not to rub the print to hard once the tape comes off.
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those who understand binary and those who don't. ~Author Unknown
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qubitz
Joined: 13 Oct 2009
Posts: 53
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| Posted: Sun Dec 20, 2009 11:01 pm Post subject: |
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| Thanks for the tip. I assume this will not hurt the chip, and it will still work after soaking? |
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Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
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| Posted: Sun Dec 20, 2009 11:14 pm Post subject: |
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| qubitz wrote: | | Thanks for the tip. I assume this will not hurt the chip, and it will still work after soaking? |
no it wont hurt it, even if there is bad seal on the die cap, this liquid evaporates off leaving no residue
it is very similar to acetone, but wont touch the print like acetone could.
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There are 10 types of people in this world:
those who understand binary and those who don't. ~Author Unknown
http://www.x86-guide.net/Neon-WA/en/collection.html |
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qubitz
Joined: 13 Oct 2009
Posts: 53
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| Posted: Sun Dec 20, 2009 11:15 pm Post subject: |
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| Awesome...I'll give it a shot tomorrow and let you know how it works. |
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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: Mon Dec 21, 2009 3:32 am Post subject: Re: Cleaning Chips |
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| qubitz wrote: | I've got an old chip that was taped into a socket. I've taken it out of the socket, and now I'm trying to figure out how to clean the tape off of the chip.
Any suggestions? |
Just be careful that the print doesn't pull off with the tape.  
No print = greatly reduced value of a Nice chip.
Congrats!
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My collection list (growing) http://johnorun.x86-guide.com/en/collection.html |
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donutty
Joined: 16 Feb 2008
Posts: 1122
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| Posted: Mon Dec 21, 2009 4:31 am Post subject: |
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Nice chip...but what nutter put tape on it?!
Good luck with getting it off ! |
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qubitz
Joined: 13 Oct 2009
Posts: 53
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| Posted: Tue Dec 22, 2009 8:43 am Post subject: |
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| I tried out the denatured alcohol and it worked great. |
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Windmiller
Joined: 24 Jun 2005
Posts: 1716
Location: Chapel Hill, NC
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| Posted: Tue Dec 22, 2009 8:45 am Post subject: |
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| Beautiful chip, good job! |
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Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
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| Posted: Tue Dec 22, 2009 9:03 am Post subject: |
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great job mate
you have a very nice looking chip there now
when your up to it.. i can tell you how to remove the slight rust stains on the legs
_________________
There are 10 types of people in this world:
those who understand binary and those who don't. ~Author Unknown
http://www.x86-guide.net/Neon-WA/en/collection.html |
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qubitz
Joined: 13 Oct 2009
Posts: 53
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| Posted: Tue Dec 22, 2009 9:27 am Post subject: |
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| I'm definitely up for getting that rust stain off. How do I do it? |
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hugo929
Joined: 27 Oct 2006
Posts: 6163
Location: China
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Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
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| Posted: Tue Dec 22, 2009 9:56 am Post subject: |
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| qubitz wrote: | | I'm definitely up for getting that rust stain off. How do I do it? |
i use a cotton bud (Q-tip i think they call them in the US) soaked in CLR. Gently wiping the gold surfaces and letting it sit for a few minutes. Then wash the CLR off with water.
If the stain still present, i will repeat the process.
Note.. keep CLR away from any solder, as it can take the shine off it & turn it a dull grey.
Also dont use it on any plated surfaces that have bubbled from corrosion under the plating.
I havent tried it on silver plating.. so i would keep it away from the die cap unless you have something else to try it on first
link to CLR product so you know what stuff i use http://housewares.hardwarestore.com/35-176-rust-removers/clr-calcium-lime-and-rust-remover-225227.aspx
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There are 10 types of people in this world:
those who understand binary and those who don't. ~Author Unknown
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wepwawet
Joined: 18 Mar 2004
Posts: 3019
Location: Seligenstadt - Germany
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| Posted: Tue Dec 22, 2009 11:26 am Post subject: |
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haha, two nice white 6502's you show here.
When can we ecpect the third?
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