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December 2005

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Subject:
From:
"Blomberg, Rainer (FL51)" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Blomberg, Rainer (FL51)
Date:
Mon, 5 Dec 2005 11:30:18 -0700
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text/plain (87 lines)
Based on some of the other responses, I would volunteer that in our
production, about 20 joints per 1000 need reflow, but not from dewetting.
Most of the need to reflow comes from insufficient solder (heel fillets) due
to all leads not being in full contact with the pad (coplanarity issues). On
rare occasion there may be 1 lead in 50 thru-hole parts that has
questionable solder due to dewetting.  We see fewer and fewer thru-hole
parts and most of them (like heavy inductors) are hand-soldered.

Hope this helps,

Rainer G. Blomberg 
Staff Production Engineer 
Space Systems - Clearwater 
Honeywell International, Inc. 


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Baski Devre
Sent: Monday, December 05, 2005 11:42 AM
To: [log in to unmask]
Subject: [TN] [Fwd: Nonwetting Pad numbers]

Dear Technetters

I look ovefr the IPC A-610 but I can not face with the quantity of
nonwetting pads after assembly of the PCB.   
What are the acceptibility criteria of nonwetting PCB  for  a PCB which has
about thousand pads both smd pads and through hole pads. Or, is there any
standard which can state that after assembly how many  pads are tolerant to
not being soldered per 1,000 pads.

Best Regards

--
Yusuf GÖMEÇ
Product Quality Engineer

BASKI DEVRE SAN ve TIC LTD STI
Ceyhan Sk. No:10 34896 Pendik-Istanbul-Turkey

Tel: 00 90 216 3901036 (4 Hat/Line)-173(Extention)
    00 90 216 4836560 (4 Hat/Line)-173(Extention)
Fax: 00 90 216 3544941
    00 90 216 4913269
Gsm: 00 90 533 6579897
    00 90 533 7480014 




--
Yusuf GÖMEÇ
Product Quality Engineer

BASKI DEVRE SAN ve TIC LTD STI
Ceyhan Sk. No:10 34896 Pendik-Istanbul-Turkey

Tel: 00 90 216 3901036 (4 Hat/Line)-173(Extention)
     00 90 216 4836560 (4 Hat/Line)-173(Extention)
Fax: 00 90 216 3544941
     00 90 216 4913269
Gsm: 00 90 533 6579897
     00 90 533 7480014 

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