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Article #230

Question regarding probe pads

#230
From: Tapas Banerjee
Date: Fri, 04 Sep 1992 02:20
19 lines
1385 bytes
  Some points about landing probe pads inside a design chip seems to be unclear to me.
Hope some kind soul would be able to help me out.

  Say I want to probe a point in the circuit, which is a point inside a standard cell.
Since standard cells are designed very compact - I have the following question. Is the
standard practice is of landing probe pads inside standard cell, or that of taking a
metal(?) wire out from the point and placing the probe point at a convenient point
outside standard cells. 

  The reason I have this question is - that if you want to put a probe pad inside a
 cell, I believe it is going to be small enough to satisfy various design rules. And
 my personal experience says that for a novice prober, anything less than 50 micron
 square is dangerous. Since a bit of vibration may land you into a serious trouble.

   Any help will be appreciated.

   Thanks in advance.

   -  TAPAS
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Path: arc1-ca.pugleaf.net!sparky!uunet!cs.utexas.edu!torn!csd.unb.ca!morgan.ucs.mun.ca!pooh.engr.mun.ca!tapas

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Newsgroups: comp.lsi
Path: arc1-ca.pugleaf.net!sparky!uunet!cs.utexas.edu!torn!csd.unb.ca!morgan.ucs.mun.ca!pooh.engr.mun.ca!tapas
From: tapas@pooh.engr.mun.ca (Tapas Banerjee)
Subject: Question regarding probe pads
Message-ID: <tapas.715573218@femto.engr.mun.ca>
Summary: Same as heading
Keywords: probe pads
Sender: usenet@morgan.ucs.mun.ca (NNTP server account)
Organization: Memorial University of Newfoundland
Date: Fri, 4 Sep 1992 02:20:18 GMT
Lines: 19