Electronics Forum | Mon Jan 31 21:11:09 EST 2000 | Dave F
Dave: Find: "Comprehensive Surface Mount Reliability Model Covering Several Generations of Packaging and Assembly Technology", by J. Clech et.al. IEEE Trans on Comp. Hyb. and Manuf. Tech. Vol. 16, No. 8 Dec. 1993, p.949. It listed cycle to failure
Electronics Forum | Thu Dec 09 23:57:41 EST 1999 | Jeff Sanchez
Mike, A drag solder system is not so bad. If it's not discoloring the silk screen , damaging your parts or blistering your boards than it looks like a safe bet. I am not sure what other components you have on the boards besides the LED's? But the
Electronics Forum | Wed May 27 13:42:08 EDT 1998 | Chrys
| R&D is currently designing a board with smt components on both sides of the board. They are adding a 16 pin IC Gull wing. on the bottom side of the board. I have asked for only caps and resistors to be placed on the bottom side. Is there a recommen
Electronics Forum | Wed May 27 14:35:52 EDT 1998 | Justin Medernach
| | R&D is currently designing a board with smt components on both sides of the board. They are adding a 16 pin IC Gull wing. on the bottom side of the board. I have asked for only caps and resistors to be placed on the bottom side. Is there a recomm
Electronics Forum | Tue Sep 25 14:08:59 EDT 2001 | davef
Oooo, the solder on the pad and PGA ball is flowing during reflow down the via to the secondary side? Why didn�t you say so?? ;-) Why would you expect that gravity and capillary action wouldn�t force solder to flow down the solder plated via to the
Electronics Forum | Tue Jun 30 18:37:19 EDT 1998 | Earl Moon
| Hi all . | Thanks to Ryan, Brian , Justin and Dave for the timely help earlier. | I would appreciate if somebody could help me in the stated issue: | I am trying to to place one thru hole 20 pin connector along with the SMT components by paste pri
Electronics Forum | Mon Jul 06 13:17:50 EDT 1998 | Upinder Singh
| | Hi all . | | Thanks to Ryan, Brian , Justin and Dave for the timely help earlier. | | I would appreciate if somebody could help me in the stated issue: | | I am trying to to place one thru hole 20 pin connector along with the SMT components by p
Electronics Forum | Wed Feb 01 08:12:04 EST 2006 | Chunks
OK, this is easy. You say HIGH fall out, so I can assume 25 or 50%? If so, run 10 without the heat gun and 10 with. This should show you if the heat gun process is the cause or not. If the relay is a surface mount, hand solder them on. If it's a
Electronics Forum | Tue Sep 10 08:42:26 EDT 2013 | rway
Most of our product are mixed technology. I don't consider thru-hole components as "pesky." Perhaps from a manufacturing point of view they are due to the extra handling and machine requirements. But from a reliability stand-point, thru-hole is mu
Electronics Forum | Mon Jun 28 11:47:54 EDT 1999 | Christopher Cross
| | | hello, | | | | | | has anyone tried dispensing solder paste in thru holes instead of waving or hand soldering. if so how did it work out for you. | | | thanks for the input | | | | | | wayne | | | | | | | | | | | We have tried this mainly
