Where does one get a copy of PRF 31032 and who's spec is it?
                                        Jim Spendow
                                        Fax 616-241-8686
                                        Ph 616-241-8413


______________________________ Reply Separator _________________________________
Subject: Re: FAB-etchback
Author:  [log in to unmask] at SMTPpost1
Date:    4/16/96 9:50 AM


PRF 31032, which is the spec intended to replace MIL P 55110 has the same 
requirements in it for etchback, which are .0002 - .003" when specified by the 
master drawing.  If no etchback is specified, than a negative etchback of 
.0005 is allowable.
     
-------------------------------------- 
Date: 4/15/96 10:23 AM
To: LISA GREENLEAF
From: Lyle Andersen
Can anyone inform me of the current status of the military requirement re: 
etchback?  A potential customer's blueprint references 55110D and 
specifically calls out for etchback on type 3 boards (multilayer). However, 
the board will have a commercial application and,  as is common with 
blueprint notes, this may be of the "boilerplate" variety.  They may be 
satisfied with desmear with a little education and persuasion.  Thanks to 
any who respond.
     
Lyle Anderson
Electrostar-Utah Division (formerly Lundahl Astro Circuits 
Phone 801-753-4700 ext. 3040