You and your organization are not the only ones being driven crazy by this these specifications. Current J-Std-001 leads you to believe all must be coated.  The A610 seems to  make better use of the  acronym AABUS (as agreed between user and supplier).   In my experience, you can sometimes explain and convince  the customer that there is little value in coating the side of  molded components. Only try electrical conductors. 

More often than not, this is easier  done at the start of a program  rather than after the fact. 

Rich Kraszewski
PLEXUS
(920)969-6075


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Çetin Yegin
Sent: Friday, March 14, 2014 3:02 AM
To: [log in to unmask]
Subject: [TN] Confusion about conformal coating area

Dear All,

We have a confusion about conformal coating area. Our quality department rejects some boards because edges of some high components were not coated. These edges are non-conductive and I think there is no need to coat non-conductive areas. IPC-A-610 10.5.2 says that "Conformal coatings should be transparent, uniform in color and consistency and uniform cover the board and components".

1.       Does it mean we have to coat all areas unless specified in design document?

2.       Is there any requirement to coat non-conductive areas?

3.       Do we have to coat non-conductive areas of components?


Thanks.

Best Regards

Çetin YEĞİN
Senior Engineer

ASELSAN A.S. \ ASELSAN INC.
Microelectronics, Guidance and Electro-Optics Division (MGEO) Çankırı Yolu, 7. km, 06750 AKYURT, ANKARA, TURKEY
Phone: +90 (312) 847 53 00 Ext:4071
Fax: +90 (312) 847 53 20


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