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Author Topic: [CLOSED] BOUNTY: BFL SC die size (20BTC) and process node (20BTC)  (Read 8298 times)
SgtSpike
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November 06, 2012, 09:32:29 PM
 #61

http://bitcoinmagazine.net/bfl-confirms-65nm-process-for-sc-lineup/
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November 07, 2012, 12:05:46 AM
 #62

The information is apparently in Bitcoin Magazine, and subscribers have reported getting the magazine already. A quick readthrough and post is worth 40BTC.

No, because the bounty clearly states (and has stated since the very first day it was posted) that it is null and void if BFL releases the figures.  BFL has released the process node, which is 65nm, so that bounty is no longer valid.

The die size bounty is still open.

The printing press heralded the end of the Dark Ages and made the Enlightenment possible, but it took another three centuries before any country managed to put freedom of the press beyond the reach of legislators.  So it may take a while before cryptocurrencies are free of the AML-NSA-KYC surveillance plague.
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November 07, 2012, 12:09:06 AM
 #63

The information is apparently in Bitcoin Magazine, and subscribers have reported getting the magazine already. A quick readthrough and post is worth 40BTC.

No, because the bounty clearly states (and has stated since the very first day it was posted) that it is null and void if BFL releases the figures.  BFL has released the process node, which is 65nm, so that bounty is no longer valid.

The die size bounty is still open.
Didn't Josh say 3cm x 3cm, or was that external chip size, not die size?
eldentyrell
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November 07, 2012, 12:10:45 AM
 #64

Didn't Josh say 3cm x 3cm, or was that external chip size, not die size?

Link?

The printing press heralded the end of the Dark Ages and made the Enlightenment possible, but it took another three centuries before any country managed to put freedom of the press beyond the reach of legislators.  So it may take a while before cryptocurrencies are free of the AML-NSA-KYC surveillance plague.
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November 07, 2012, 12:14:14 AM
 #65

Didn't Josh say 3cm x 3cm, or was that external chip size, not die size?

Link?

I thought the package size was 11mmx11mm.

30x30 is huge.
SgtSpike
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November 07, 2012, 12:21:43 AM
 #66

Yes, sorry, 11mm x 11mm.  My memory was thinking of something else.

https://bitcointalk.org/index.php?topic=119351.msg1311322#msg1311322
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November 07, 2012, 12:25:34 AM
 #67

The die size is 7.5mm^2
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November 07, 2012, 12:26:05 AM
 #68

The die size is 7.5mm^2
Where's the source for that then?
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November 07, 2012, 07:52:21 AM
 #69

Tell you guys what.  I can confirm process node and die size if I can get a chip.
I can get the die size with XRD and process node with cross section SEM.
Anything thing else?  # of Metals, bonding wire method, packaging durability,
well profile, die thickness
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November 07, 2012, 01:33:55 PM
 #70

The die size is 7.5mm^2
Where's the source for that then?

Check the comments section.  BFL_Josh clears up the die size question. 
https://forums.butterflylabs.com/content.php/125-BFL-ASIC-Update

The die size is 7.5mm^2
eldentyrell
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November 08, 2012, 02:17:36 AM
 #71

Check the comments section.  BFL_Josh clears up the die size question.  
https://forums.butterflylabs.com/content.php/125-BFL-ASIC-Update

The die size is 7.5mm^2

Hrm, that would be a square die less than 3mm on each side, which is pretty hard to wirebond and in a package that would be ridiculously oversized for it.  There are sometimes power and thermal reasons for using an absurdly large package, but putting a 7.5(mm^2) die in an 11mmx11mm package means you're going to have bonding wires on the order of 4mm long on all sides -- at that point you have some serious inductance in the bond wires.  Not saying it's impossible, but it certainly is unusual.  That's the very upper limit of what MOSIS allows.

Can we get BFL_Josh to confirm that he didn't mean (7.5mm)^2 aka 56.25(mm^2)?  He's transposed those two units before claiming the package was 11mm^2.

7.5(mm^2) isn't impossible, but 56.25(mm^2) is more plausible.

The printing press heralded the end of the Dark Ages and made the Enlightenment possible, but it took another three centuries before any country managed to put freedom of the press beyond the reach of legislators.  So it may take a while before cryptocurrencies are free of the AML-NSA-KYC surveillance plague.
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November 08, 2012, 02:21:02 AM
 #72

Check the comments section.  BFL_Josh clears up the die size question.  
https://forums.butterflylabs.com/content.php/125-BFL-ASIC-Update

The die size is 7.5mm^2

Hrm, that would be a square die less than 3mm on each side, which is pretty hard to wirebond and in a package that would be ridiculously oversized for it.  OTOH there are sometimes power and thermal reasons for using an absurdly large package.

Can we get BFL_Josh to confirm that he didn't mean (7.5mm)^2 aka 56.25(mm^2)?  He's transposed those two units before claiming the package was 11mm^2.

7.5(mm^2) isn't impossible, but 56.25(mm^2) is more plausible.

He confirmed it on the BFL thread referenced earlier. 56.25mm2. 7.5x7.5mm.

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eldentyrell
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November 08, 2012, 02:26:14 AM
 #73

He confirmed it on the BFL thread referenced earlier. 56.25mm2. 7.5x7.5mm.

Thank you, that makes way more sense.  Somebody please teach that man the difference between mm and mm2.

The printing press heralded the end of the Dark Ages and made the Enlightenment possible, but it took another three centuries before any country managed to put freedom of the press beyond the reach of legislators.  So it may take a while before cryptocurrencies are free of the AML-NSA-KYC surveillance plague.
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