SANJAY,
     
     THERE ARE TWO JEDEC STANDARDS FOR QFP'S.
     
     MS-022; MQFP WITH BODY THICKNESSESS 2.0MM AND GREATER; COPLANARITY IS 
     0.1MM.
     
     MS-026; TQFP WITH 1.0 AND 1.4MM BODY THICKNESSES; COPLANARITY IS 0.1MM 
     FOR 0.65MM LEAD PICH AND >..  0.08MM FOR 0.5MM LEAD PITCH AND <..
     
     MAURY


______________________________ Reply Separator _________________________________
Subject: GEN: Lead Coplanarity Spec??
Author:  [log in to unmask] at smtp
Date:    1/22/97 10:53 AM


     
Technetters:
     
I have a couple of questions and would appreciate 
any input...
     
1. What is the JEDEC/IPC spec on lead coplanarity
    for QFP's?
     
2. Can anyone recommend any tinning houses that would
    tin surface mount packages for us?  I know one such place 
    is Corfin, are there any other popular ones?
     
     
Thank you
     
________________________________________________ 
Sanjay Rajan        RF Communications Division 
Harris Corporation  Product Design Engineering 
1680 University Avenue   Phone:    (716) 242-3923 
Rochester, NY 14610 Fax: (716) 242-3174 
________________________________________________
     
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