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Old 24th July 2002, 10:49 AM   #1
Vivek is offline Vivek  India
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Default DIY ICs

Hi all,
How far do you guys think the day is when we DIYers will make our own ICs and possibly tweak ones that have already been made.

Vivek
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Old 24th July 2002, 01:02 PM   #2
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Not to sound too negative, but I am a firm believer in the principle that our (DIY) efforts are best applied to where they will have the most gain. Until we have table top silicon foundries, I do not see DIY integrated circuits being realistically feasible. Unless someone in the group who works for a fab can moonlight for us...

Pehaps we can try casting our own enclosures & heatsinks in the meantime!
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Old 24th July 2002, 04:01 PM   #3
Vivek is offline Vivek  India
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Right-O Gilid and thanks.

Vivek
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Old 24th July 2002, 04:44 PM   #4
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there were an entire series of articles on DIY op-amps in Audio Amateur. Not the kind you build with a 300mm wafer- the kind you build with your own discretes for better matching etc.
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Old 24th July 2002, 08:05 PM   #5
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You can make your own analog ICs. You go to any of the many semiconductor foundries and hand them $50k-500k for a mask set (depending on the process) and all the CAD files and they will run a wafer of your ICs through their fab. Of course, this may be contingent on how many such wafers you intend to run through their fab per month...

Then you go to a packaging house and hand them a pile of money and they'll saw the wafer and package the parts for you. Of course, this may be contingent on how many such wafers you intend to run through their factory per month...

The IC manufacturing process is so expensive that the only way it makes economic sense is to make a lots of ICs (hundreds of thousands to millions). The process is not flexible enough to allow easy/inexpensive modification.

I have recently seen ads for analog"gate array" type chips that are one time programmable (I think). Instead of logic gates, they have analog function blocks that can be connected together. That is probably as close as you'll ever get to DIY analog ICs, until someone comes up with a new process you can run via your ink-jet printer...

MR
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Old 25th July 2002, 06:03 AM   #6
Vivek is offline Vivek  India
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Hi MRehorst,
You are talking big $$$. Not worth the trouble at this time.

Vivek
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Old 25th July 2002, 06:20 AM   #7
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Quote:
Originally posted by Vivek
Hi
You are talking BIG. worth the trouble?.

Vivek
g
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Old 25th July 2002, 06:25 AM   #8
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Default Tweak IC - possible?

Building an Microphone Pickup
I tweaked an OP in middle segment
to get very low noise intake.
It was 8 pin DIL/DIP single device!

Nice THREAD.
"Keep it CLEAN"
cheers VIVEK

gro
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Old 25th July 2002, 07:27 AM   #9
Vivek is offline Vivek  India
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Keep your comments coming guys. I believe amateurs are a bright lot whose talents are never really recognised.

Vivek
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Old 25th July 2002, 08:01 AM   #10
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