Hi Brad, A really useful working 'hot bar' was developed at Bell Labs, was successfully used internally, but never was commercialized. Here are the references, Engelmaier, W.,“Transverse Joulean Heated Soldering Tool for Mass Terminations,” Proc.NEPCON/West, Anaheim, CA, February 1979, pp. 228-235. Engelmaier, W.,“Transverse Joulean Heated Double-Sided Reflow Soldering Machine for MassTerminations,” Proc. NEPCON/West, Anaheim, CA, February 1981, pp. 333-339. Engelmaier, W., andHans H. Ammann “Laminated Electric Heat Generating Member for Reflow SolderingDevices,” U.S. Patent 4,412,123, October 25, 1983.. Werner -----Original Message----- From: Brad Saunders <[log in to unmask]> To: [log in to unmask] Sent: Tue, Jul 13, 2010 3:43 pm Subject: Re: [TN] SFF-8087 PCB (Also call Min SAS)---Really need you help 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: 0769-22810730 Fax:0769-22810732 Email:[log in to unmask] ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask]<mailto:[log in to unmask]> ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask]<mailto:[log in to unmask]> with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]<mailto:[log in to unmask]>: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]<mailto:[log in to unmask]>: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives<http://listserv.ipc.org/archives> Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16<http://www.ipc.org/contentpage.asp?Pageid=4.3.16> for additional information, or contact Keach Sasamori at [log in to unmask]<mailto:[log in to unmask]> or 847-615-7100 ext.2815 ----------------------------------------------------- ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------