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July 2000

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Subject:
From:
"McMonagle, Mike" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 11 Jul 2000 13:17:01 -0400
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Barry,
    You might want to also investigate the possibility of board warpage
during reflow, it doesn't take much to cause opens on large, fine pitch SMT
connectors.

Mike McMonagle
Senior SMT Engineer
Telxon Corporation
(713) 307-2443 Phone
(713) 307-2581 Fax
www.telxon.com

' Innovative Solutions for
Mobile Information and
Wireless Communications'



-----Original Message-----
From: Barry Gallegos [mailto:[log in to unmask]]
Sent: Tuesday, July 11, 2000 11:30 AM
To: [log in to unmask]
Subject: [TN] Smt Connector Defects



Hello TechNetters.



I am having SMT Connectors from Amp that are rising up in Reflow and causing
opens on the connector. The connector is a Con PRNC 64 pin SMT/1.0 FH Plug.

It is my belief that the guide pin to hole ratio is probably too tight; I
feel that the plastic guide pin on the bottom of the connector is expanding
in reflow thereby causing the connector to rise. If so I need some guidance
on how to correct for this. Do I ask my customer to redesign his board, or
is there a part issue to be addressed with the part vendor.



Any advice will be greatly appreciated.



Thank you in advance.



Barry Gallegos

Process Wana be.

208-377-1557 xt. 18

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