I would like to get some information on expected yields for
non-soldered leads using 240 pin PQFPs.5mm pitch. Our
yield is 25% or more bad circuit cards on average. The lead
coplarity ranges from 0 to 3.5 mils with most falling in at 2.5
to 3.5 mils. Is this common or can process improvements
without equipment purchases help?. We have a FUJI GSP III
screen printer with rubber squeezes and are using 7 mil thick
laser cut stencils. I could use any help and expected yields
information. We are going to change to BGA sometime later
this year.

                                                        Thanks
Ron Mowbray
Menber of Technical Staff
Paradyne Corp.
Largo, Fl.
e-mail: [log in to unmask]

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