In my experience, including the "way back machine" Hot Bar soldering was never so hot and compelled me to spend more time in the bar...
With the risk of failure, reliability less than 100%, and potential scraping of full value modules I always went with a small/mini/nano connector solution. Although I do know there are folks out there successful in Hot Bar usage. ["way back" being from 1985-1990, when all kinds of things were going on in PCB land and CTE became a household name...]
Brad
----- Original Message -----
From: Tony Liu<mailto:[log in to unmask]>
To: [log in to unmask]<mailto:[log in to unmask]>
Sent: Thursday, July 08, 2010 10:49 AM
Subject: [TN] SFF-8087 PCB (Also call Min SAS)---Really need you help
Hi,
I need you help,appreciate you if you can give some useful suggestion
Now a product that called Mini SAS is making in my compay,it is a cable
assembly, consist by two PCB ,36 way wires,heat shrink
tubing,innermold,overmold,etc.The wire diagram is one to one,two ends are
36PIN PCB.
The PCB is 36 PIN(18PIN in each surface) and the pitch between each pad are
very small, PCB pad width is 0.6mm and the pitch is 0.8mm,the operator weld
the conduct of wires to PCB pad by HOT-BAR(auto welding maching),
the key problem is after welding and testing there have many badness goods
be made,like as short,open,insulation resistance is very small between each
pin(<1M Ohm),just low than 70% goods could be passed test.
Pls give your prefessional advice how to solve this problem,for instance
PCB designing improve?
Sn component imrpove?
Welding machine parameter?
http://www.google.com.hk/images?hl=zh-CN&q=MINI%20SAS%20PCB&um=1&ie=UTF-8&so<http://www.google.com.hk/images?hl=zh-CN&q=MINI%20SAS%20PCB&um=1&ie=UTF-8&so>
urce=og&sa=N&tab=wi
(This web link to MINI SAS 36PIN products,FYI)
Thank you!
Tony Liu
Sales Department
Mobile:13048936174
18926869763
Tel£º 0769-22810730
Fax£º0769-22810732
Email:[log in to unmask]
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