Electronics Forum: planes (Page 39 of 42)

Re: Qualifying new PWB Vendors

Electronics Forum | Fri Jan 15 15:06:30 EST 1999 | Earl Moon

| Hello, | | We are qualifying new sources of PWB vendors. We've got the first lot of "produciton" boards in and we want to put them through the paces before turing the vendors on. | | So far, the tests I can think of performing, and that we have

Re: Qualifying new PWB Vendors

Electronics Forum | Fri Jan 15 15:17:21 EST 1999 | Earl Moon

| | Hello, | | | | We are qualifying new sources of PWB vendors. We've got the first lot of "produciton" boards in and we want to put them through the paces before turing the vendors on. | | | | So far, the tests I can think of performing, and tha

Re: Nepcon 2000???

Electronics Forum | Thu Jan 14 06:59:13 EST 1999 | Bob Willis

| | | What's going on with Nepcon next year??? | | | I have heard rumors allot of the big guys are moving to IPC/SMEMA show on a long beach somewhere in Calif.. | | | | | | Any info on who is planning to attend Nepcon 2k would be nice | | | Fuji?

Re: I got dem ol' backplane blues...(harmonica wailing in the background)

Electronics Forum | Sat Sep 26 17:58:33 EDT 1998 | Phillip Hunter

| O-H-H-H-H-H-H-H Lawdy, lawdy... | My babuh done left me... | my dawg pee'd on my leg... | my cornflakes are all poopy... | don't make me hafta beg... | I got's dem backplane blues, o-h-h-h-h-h lawdy..." | OH! | | Hi there! Scared me fer a secon

Re: Wavesoldering Organic Copper Coated Vias

Electronics Forum | Thu Jun 25 14:45:55 EDT 1998 | Chrys

| I have a single-sided board with test vias that pass through the board. The test vias are pasted and reflowed with the SMT components on the top side. When the boards are wavesoldered, the solder coverage on the vias is spotty. Some will sold

Re: Providing Thermal Relief On Vias

Electronics Forum | Wed Jun 03 21:25:33 EDT 1998 | John Allan

| Hello: | BACKGROUD: SMT components soldered on the top-side of boards that also require wave soldering have the potential to reflow during wave soldering. Reflowing these components during wave soldering is not good. It can cause cold joints, op

Re: Minimizing Board Warpage During Reflow

Electronics Forum | Wed Jun 03 11:17:17 EDT 1998 | Brian Stumm

If your board is single sided you should convey it on a mesh belt conveyor. Unfortunately most assemblies these days are double sided which makes it difficult to convey on the mesh belt. Plus with the increasing population on SM boards the weight is

Thanks for the info!

Electronics Forum | Wed Jun 03 14:37:53 EDT 1998 | Anthony

I really appreciate everybody taking the time to help me out with this problem. I'm going to run your input by the design engineer, after that I may be taking you up on that offer to contact you Earl. Again; thank you! Anthony | If your board is si

Non-wetting on QFP lead

Electronics Forum | Wed Nov 21 19:45:36 EST 2001 | Yngwie

Hi Guys, I need help. I�ve a trouble with non-wetting problem on the lead of 208 pin, 20 mils pitch QFP. We are on intrusive reflow. I never faced this problem before on this product after running them for about 2 years now. This occurred on one pa

Soldering

Electronics Forum | Wed Dec 05 17:30:02 EST 2001 | davef

How do you know that "approx 450�C" is "too high"? As a side, the temperature on the temperature sensor is: * Inaccurate. * Not the temperature at the solder. Listen, operators are smart people. They have figured-out that they can solder faster wi


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