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- Newsgroups: comp.arch
- Path: sparky!uunet!gumby!destroyer!news.iastate.edu!help.cc.iastate.edu!willmore
- From: willmore@iastate.edu (David Willmore)
- Subject: Re: Die aspect ratio.
- Message-ID: <willmore.713828515@help.cc.iastate.edu>
- Sender: news@news.iastate.edu (USENET News System)
- Organization: Iowa State University, Ames IA
- References: <16edveINN7or@agate.berkeley.edu> <1992Aug14.162235.22906@micor.ocunix.on.ca>
- Date: Fri, 14 Aug 1992 21:41:55 GMT
- Lines: 21
-
- panter@micor.ocunix.on.ca (Bill Panter) writes:
- >krste@ICSI.Berkeley.EDU (Krste Asanovic) writes:
- >>
- >>I've a few questions for the VLSI hackers out in industry.
- >>
- >>Rectangular die give more perimeter per unit area if a design is pad
- >>limited. What's the largest sensible/known aspect ratio? (We've done
- >>one processor die with an aspect ratio of 2.3:1).
- >>
- >For that matter, a triangle (say a bisected square) can give a better
- >perimeter than that. The bisected square gives a perimeter/area ratio
- >of 6.88/sq, while the 2.3:1 rectangle gives only 2.87/sq. Can the
- >fab people out there tell us if its practical to cut a square die corner
- >to corner?
-
- Not claiming to be a fab person (yet), but I would think that the triangular
- QPFP, PGA and PLCC carriers would be awfully hard to design with. :)
-
- --David Willmore
- willmore@iastate.edu
-
-