Electronics Forum | Fri Feb 25 05:42:17 EST 2000 | Istv�n Dominik
Hi, We should wavesolder a PLCC44 package. The PCB is under the design procedure now and we must specify the best parameters (the orientation (45 or 90 degrees) of the package on the PCB,the number, the positon and the size of the solder thief pads
Electronics Forum | Fri Feb 25 16:04:18 EST 2000 | Dave F
Sze-Pei: Are talking BGAs here? Flux type? Profile? Pad material? Aperture size? We won�t want to give people too many hints on what the problem is would we? BGA voiding is a function of materials, methods, environment, and human factors. Con
Electronics Forum | Thu Feb 24 21:47:22 EST 2000 | Dave F
Interesting, Gary. Try this: 1 Assess candidate solders by reviewing J-STD-006 (http://canfieldmetals.com/j-std006.htm) to determine solder formulations that have liquidous temperatures in the desired range. 2 Request recommended profiles from supp
Electronics Forum | Thu Feb 24 14:58:11 EST 2000 | Greg denham
Does anyone have any information on baking boards to remove moisture before reflowing and waving assemblies? I've been told that we should do this to stop such problems as delamination of boards, blow holes, solder balls, etc. I don't know have any e
Electronics Forum | Thu Feb 24 18:08:42 EST 2000 | Travis Slaughter
Baking boards, especially multi layer, will help with blowholes and delimitation, but not with solder balls. Normally about 120c for 1 hour or so is sufficient. I usually will not go to this trouble unless a board has proven to be a problem or if th
Electronics Forum | Fri Feb 25 10:23:46 EST 2000 | K3 Equipment
Greg, If you are having a problem, i would first check board manufacturers process. Also are they shipping boards to you in seal packages (a must if you are in a humid part of the country.) Most of the time with a few simple process controls moistur
Electronics Forum | Mon Feb 28 17:16:38 EST 2000 | Stu Leech
We just got a lesson on the effectiveness of heat sealed metalized vapor barrier bags. A customer sent us two bags of 100% saturated PBG components by air freight. This was for a demoisturizing test. When we found the devices 80% dry when they arrive
Electronics Forum | Thu Feb 24 14:42:56 EST 2000 | Ashok Dhawan
We are looking for a source which can accept our packing material ( PVC tubings, Chip Trays, reels and spools , PCB waste rails from depanalization). Anybody, who is currently using a recycling manufacturer for these packing wastes. Our intent is:
Electronics Forum | Thu Feb 24 16:35:02 EST 2000 | D Scott
Larry, I have seen this problem on our IP-3 also. You can recover from this without powering down by going into the I/O page and turning off that particular function. The machine should be fine once you exit out of the I/O page. It almost acts like
Electronics Forum | Thu Feb 24 08:51:23 EST 2000 | Brandy Ford
SMTnet is here for our users. One of our goals is to make SMTnet as user friendly as possible. We are in the process of building an effective Career Center to better serve you, but are looking for your feedback as to what YOU believe would improve
