Hello,
I am getting ready to qualify a new cleaning process using IPC B-36 test
coupons and I am looking for suitable components for the test. The board
was designed for the use of a 68 pin LCC or PLCC. The footprint is
about .800 mils inside pad to pad square. The pad length is apx .100 mils.
The problem with the components mentioned above are:
The PLCC from Practical Components has a standoff height of about .020 mils
and the LCC fits tight to the board with no stand off at all. If I use the
LCC I will likely fail the SIR testing because I don't think I can get
under it to clean completely. If I use the PLCC, I will clean it ok, but I
don't feel that it is a practical representation of what we see in
production. I would really like to find a QFP that would fit this footprint
and that I can form to a more realistic standoff height. Does anyone have
any suggestions?

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