Electronics Forum | Mon Dec 17 15:11:35 EST 2007 | chef
Blew chunks - thanx for thinking outside the box. Of course there's two sides to every story. Just last week I had a new operator "splash" a couple of boards. Top solder was great, it was all one big solder bridge. Come to find out, the operator forg
Electronics Forum | Thu Jul 20 13:00:15 EDT 2000 | Bob Willis
By resistor packs do you mean SOIC resistor networks ?
Electronics Forum | Sun Oct 03 18:26:17 EDT 1999 | park
What are pro's and con's of reflowing top side first and curing bottom side chip components, and then wave soldering bottom side? How about curing bottom side first and reflowing top side later? What percentage of companies run reflow/cure/wave for
Electronics Forum | Thu Aug 29 20:04:13 EDT 2002 | davef
Steve: I agree. Let�s break it down. * I�d rather print paste than glue any day of the week * But I know yera �Dispenser Boy�. In that case, I�d rather dispense glue than paste. * PTH / primary and SMT / secondary is a tough process either way you
Electronics Forum | Thu Jul 20 14:44:26 EDT 2000 | Bob Willis
If you are getting skips on these parts the most common reason for skips is gassing and wave too low. I would agree that wave soldering these parts is not ideal. If the shorts are always in the same location on one or two pins a glue dot done during
Electronics Forum | Thu Jul 20 13:57:04 EDT 2000 | Boca
I am not answering for Techguy2000, but I am chiming in here, I have the same problem. Our resistor packs are ceramic body with no leads, they have a metalized area reminicent of the old castelation leads of year gone by. The lead pitch is 50 mil
Electronics Forum | Thu Jul 20 15:37:53 EDT 2000 | Tekguy2000
These parts are flat chip resistor arrays that have 4 end terminations on each side. It looks liek an IC but is typically in an 0805 and 1206 package type with convex terminations. .031" pitch from termination to termination and .011" spacing between
Electronics Forum | Thu Jul 20 15:47:13 EDT 2000 | Bob Willis
Based on what you have said so far it would be worth trying extra pads and as you may know the drainage pads should be a minimum of three times the length of the pads before them to be effective. Also take some parts stick them to a glass plate and r
Electronics Forum | Thu Aug 29 20:00:32 EDT 2002 | iceman
Steve, I agree, you should expect to have better results from double sided reflow. It is more difficult to dial in a wave solder process for SMT components than a reflow oven. Besides that - adhesive is just no fun to work with.
Electronics Forum | Wed Nov 01 08:55:05 EST 2006 | russ
See if the solder is leaving the pad(s) and is wicking up the component. This is long shot but I have seen something similar to this possibly in a wave process. We had a very thin board and a very large QFP on top. During wave operation the solder
