Electronics Forum | Thu May 18 10:20:55 EDT 2006 | slthomas
Russ asks good questions and I think Chunks pretty much nailed it. Aspect ratio (aperture width/stencil thickness) s/b 1.2 minimum (I like 1.5 if I can get it). If your aperture width = lead width (.008"), yours is 1. Tough to get consistent paste r
Electronics Forum | Sat May 20 09:38:55 EDT 2006 | slthomas
"witty and provocative" And that is pretty much the perspective I see all of this guy's posts from. I don't take it seriously for a second. How can you take that author name seriously? And quoting himself is perfect if he's using new usernames for t
Electronics Forum | Tue May 23 09:53:05 EDT 2006 | stepheniii
Make sure your reflow profiles are the best you can make them. You will probably want to, at the very least, get some sample BGA's and boards to sacrifice to profiling. Drill a small hole through the board into a middle ball of the BGA. Also put a t
Electronics Forum | Fri May 26 14:15:16 EDT 2006 | patrickbruneel
Its it possible to post a picture from right after reflow? To see what we start with and compare the difference after 5 years. The grainy structure is not as much a concern as the growth-like appearance on the boundary of the solder. What paste al
Electronics Forum | Sun May 28 10:35:08 EDT 2006 | mika
Mr/Mrs/Ms SMT Guru Consultant Expert "Bahodium (TM) Solder: The new alloy that WCS has successfully mined. 100% RoHS compliant and the strongest, most reliable interconnect in the industry." Say what???!! I don't understand this att all! Haha, may
Electronics Forum | Thu Jun 01 04:51:21 EDT 2006 | EC
Hi TS, Most of the machines will face this problem after been using few years.....I handling SMT equipments ( Fuji machine ) and process.....sorry if I have offened you...... Hi Jack, Firstly, you must able to tell which component having a high thr
Electronics Forum | Mon Jun 05 14:28:45 EDT 2006 | marc
A few years ago with the 1st and 2nd generations of lead free material N2 was highly recommened. Now most of the materials suppliers have good formulations that are just fine in air reflow. I would still run a DOE though... just to be sure. Als
Electronics Forum | Tue Jun 06 12:19:06 EDT 2006 | Rob
Hi John, They may still read the correct value initially, but they are not going to age well if the electrodes start oxidising. Also the high voltage surge performance & the impedance are likely to be effected, however these may be unimportant to y
Electronics Forum | Thu Jun 08 08:50:49 EDT 2006 | rlackey
also... 4 people to try and sell you their light bulbs, then get in a fight about who has the brightest/whitest/longest lasting bulb, dusted with a few choice insults. 1 random Chinese supplier offering low cost PCB's 2 Scientific experts declairi
Electronics Forum | Thu Jun 08 19:51:22 EDT 2006 | grantp
Hi, That's good news, and we did outs with SN100C as well on Wed, however we are still working hard on getting a good profile. We have some large BNC connectors, and they are hard to profile. We also have wave palettes, and these might be too thick
