Ulrich,

Try General Scanning Inc., View Engineering Division at 805-578-5000. 
They may not be able to meet your cost constraints, but the equipment
can do the job.

Phil Yates
********************************

Ulrich Korndoerfer wrote:
> 
> Dear TechNetters,
> 
> my company is building multi-chip-modules which have on each side pins
> for soldering the mcm onto a board. Pins are of the gullwing or j-lead
> type and have a pitch of 1.27 mm (1/20 of an inch). Pin counts per side
> range up to 25. Standoff is about 3 to 4 mm. Side lengthes of the mcms
> range up to 45 mm.
> 
> We are currently looking for measuring means or apparatus to determine
> the coplanarity of the pins (more exactly: coplanarity of the deepest
> points of the pins, which will rest on the board to solder to).
> 
> The goal is to detect every mcm with pins having deviation from ideal
> coplanarity of more than 0.2 mm. As a measuring result the difference
> between the lowest and highest pin will be sufficient. Apparatus thus
> must not be too sophisticated (and therefore not too expensive).
> Handling should be easy. Since several hundreds of mcms a day have to be
> measured (with increasing tendency) measuring time should be adequate.
> Also there is need to easily adopt to different types of mcms and
> pinnings.
> 
> Would you please advice.
> 
> Replies of manufacturers of such measuring devices are welcome, which
> please contact me directly (remember the ad/no ad debates at TechNet?).
> 
> Ulrich Korndörfer
> ALCATEL SEL AG
> Germany
> Phone 0049-911-4230536
> Fax 0049-911-4230723
> 
> Thanks in advance.
> 
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