Electronics Forum | Thu Jun 14 23:21:30 EDT 2001 | oem boy
I am working on 0201 development for my company in the UK, and I am planning a rather extensive DOE for my reflow oven profile. I am planning on studying various ramp rates, soak times, times above liquidus, peak temps, etc... My biggest concern
Electronics Forum | Tue Jul 17 15:13:53 EDT 2001 | mparker
Dave - I agree that the U shape for QFP's sounds a bit whacked, for the reasons you state. It may work OK for larger pitchs but then again there are a myriad of fixes that work before resorting to U shapes. With the U shape removing paste from under
Electronics Forum | Mon Dec 13 05:43:27 EST 1999 | Wolfgang Busko
Hi Steve, 20 mil pitch shouldn�t be that problem nowadays. In your case bridging and poor wetting seem to go hand in hand. For the poor wetting try to eliminate it by using different paste (higher activated) and work on your profile. Coplanarity also
Electronics Forum | Wed Nov 10 06:32:20 EST 1999 | Lee Radney
We lost the video on a touchscreen monitor that goes in in our HSP 4791 machine. The touchscreen still works but the monitor portion is dead. The monitor is a Mitsubishi Model number XC-1498C II... The Microtouch numbers are as follows....Model #
Electronics Forum | Fri Oct 29 12:18:45 EDT 1999 | stefano bolleri
We have also placed BGAs with IP-2, with no problems. Ours were 50 mil pitch PBGAs, and as Doug says the perimeter is more than enough to place the part. We have only placed from matrix tray so far. The ONLY problem is the center array, for parts tha
Electronics Forum | Wed Dec 01 01:15:44 EST 1999 | Jeff Skeith
dave, you are right on. a blow torch isn't needed to light a fire. a small coplanar aluminum block works extremely well. my dept fixes thousands of fine pitch parts to to less than 4 mils from low lead to high lead every month. all we use is a sm
Electronics Forum | Wed Sep 29 15:30:43 EDT 1999 | Scott Cook
| Guys thanks so much for your help I did'nt realize | how much feedback I was going to get. I am going to | take your advice and do a little more equipment | research and try and find the best offer I can get | without sacrificing equipment needs.A
Electronics Forum | Wed Sep 29 15:45:05 EDT 1999 | Earl Moon
| | Guys thanks so much for your help I did'nt realize | | how much feedback I was going to get. I am going to | | take your advice and do a little more equipment | | research and try and find the best offer I can get | | without sacrificing equipme
Electronics Forum | Tue Aug 31 13:24:07 EDT 1999 | Clifford Peaslee
Interesting... We will experiment with it, and see if it can be made to work as an active desktop item. I'll inform you of any new developments in that area. We have also been doing research into Microsoft's "channel" subscription technology. Thank
Electronics Forum | Thu Aug 26 11:01:47 EDT 1999 | Wolfgang Busko
| For space contracts we have to mount chip capacitors/ resistors etc 0.1 to 0.4 mm from the pad height. | | This is to compenstae for the CTE differential in the substrate/component and also to ensure cleanliness. | | Does anyone have any new idea
