Electronics Forum | Fri Feb 01 10:19:22 EST 2002 | cyber_wolf
Whoa! I beg to differ my friend. The cure profile is VERY critical in Adhesive curing, especially if your are screen printing. When you screen print adhesive you are leaving it exposed to the atmosphere for a period of time. SMT adhesive by nature i
Electronics Forum | Wed Apr 24 21:35:34 EDT 2002 | davef
Ooooo, much better. Tough to say, because of all the variables [ie, different materials, moisture level, temperature, etc]. Plastic encapsulated devices, especially IC, absorb water from the air, which is violently released during soldering. Typica
Electronics Forum | Tue Feb 19 11:08:22 EST 2002 | Chris Anglin
Guideline for Tenting Interstitial BGA Vias It is difficult to give a complete recommendation on via tenting without an idea what process conditions are required (ex: wave pass, double reflow, rework etc.). Via Pads (as Test Points) - On Bottom
Electronics Forum | Tue Feb 19 08:21:56 EST 2002 | jax
Armin, The obvious disadvantages for an in-line printer is initial cost and flexibility for smaller shops that depnd on high mix, low volume batch builds from their printer to support multiple projects at the same time. The advantage is quality a
Electronics Forum | Tue Feb 19 01:36:58 EST 2002 | djarvis
My Jimbos' (Drummoyne Dirty Reds Rugby Union Licensed Club)has, sob, just closed. How do I select a new one? Do I, for instance, start a spreadsheet and visit some new venues. What criteria do I use. Price of beer? Quality of beer? Access to bar to d
Electronics Forum | Tue Feb 19 19:33:44 EST 2002 | davef
Since yer talkin� $$$$, non-quantitative measure do not apply. I understand someone told you to do payback. But, we don�t use payback for multiyear projects. Regardless, the analysis is similar. For each machine, set-up a multiyear spreadsheet li
Electronics Forum | Tue Feb 19 14:00:55 EST 2002 | global
We have had some discussions about what causes parts to lift out of the holes when going over the wave on our flow solder machine. The machine being used is a Treiber (700 series). There are two bottom pre-heaters and one top pre-heater. We try to pr
Electronics Forum | Thu Feb 28 05:21:31 EST 2002 | Andrew H Otwell
Hi, I'm helping to design a website and database of product information for the packaging and SM industry. We're at an early stage, and I'm interesting in learning as much as possible about how people like you (Design/Dev. Engineers, Researchers, or
Electronics Forum | Thu Mar 07 15:42:34 EST 2002 | bdoyle
Sorry about creating a new thread, but I wanted to make sure that this didn't get buried. I was sent the files and have posted them to the library. http://www.smtnet.com/library/index.cfm?fuseaction=view_article&article_id=1077 There are three fil
Electronics Forum | Thu Apr 04 16:38:51 EST 2002 | davef
Equipment companies like to talk about �accuracy� and �repeatability�. These measures provide limited information. Flaws of the measure aside, some printer companies have begun to report Cp. * DEK ELA: Cp = 1.33 @ �0.025mm * DEK 265: Cp = 1.6 @ �0.0
