Electronics Forum | Wed Sep 22 21:12:16 EDT 1999 | se
| | | | My stencil thickness is 6 mil and we got qfp's with fine pitch. | | | | how many percent should i reduce my stencil aperture using a 6 mil stencil for 0.5 mm pitch and 0.4 mm pitch ? | | | | | | | | thanks | | | | | | | We use 6 mil lasercu
Electronics Forum | Wed Sep 08 14:21:21 EDT 1999 | JohnW
| | | | Last Thursday I resigned from my position as manager of SMTnet. I want to personally thank all SMTnet viewers, editors, customers, colleagues, and others for your support to me in the creation and expansion of SMTnet over the last four years
Electronics Forum | Tue Aug 10 16:57:29 EDT 1999 | JohnW
| | Does anyone use reflow profilers? Are they a good investement or is trial and error sufficient? | | | | Does anyone have any suggestions on profiles to try? Thanks. | | | Danielm | I would hazard a guess that most if not all of us production f
Electronics Forum | Fri Jul 23 23:47:03 EDT 1999 | Scott McKee
| | | There is a practise within the industry of an Inspector inspecting a board, and that same Inspector performing touch-up. My opinion is that the Inspection and Touch-up operations should be separate functions whereby the Inspector is not perform
Electronics Forum | Mon May 24 13:33:46 EDT 1999 | Dave F
| We are running a number of boards with 8-10 25 mil PQFPs on board. Our process is mature with at least 3 years experiance and statistically few opens on the QFPs. Our beloved purchasing department has chased the almighty $ and changed FAB vendor
Electronics Forum | Thu Apr 22 08:43:25 EDT 1999 | Michael N.
| | I'm having problems with trying to get a good solder joint using a Ceramic PCB. We are using AMTECH hi-temp solder (ws-486 96.5/3.5ag). My profile looks great and I used the recommended profile from Amtech with a few adjustments. My max temp is a
Electronics Forum | Fri Jan 15 03:30:10 EST 1999 | Jeff Sanchez
| Hi all, | | I thought I'd use this forum to ask a couple general questions on fluxes for manual operations: | First - Is it OK to use a wave soldering type flux (specifically OA)? Thinking about activation temperatures and the ramp rate of the wav
Electronics Forum | Tue Nov 03 16:28:21 EST 1998 | Dave F
| Well my process is I'm running my belt speed at 3.50fpm and about 215 to 225 degrees top side. I got my main wave down to a little less than half the board thickness. I'm not using a hot air knife cause we thought it might create more of a problem
Electronics Forum | Mon Oct 19 12:03:09 EDT 1998 | Scott Cook
Out of interest, are you using an 84V? 84VZ? a 60V? 60VZ? With SBIP or the Yamaha vision system (VICS 1000)? Do you have the old tray sequencer? > WRONG!!!! Why do folks still live in this mindset? I'm not slamming you personally. But this is preva
Electronics Forum | Wed Oct 21 21:27:32 EDT 1998 | smd
| | WRONG!!!! | Why do folks still live in this mindset? I'm not slamming you personally. But this is prevalent in our industry. | More opinion: | Make REWORK a nasty, dirty word. Work for the ROOT cause of a process problem. DO NOT ACCEPT rework a
