Electronics Forum | Thu Mar 07 15:38:34 EST 2002 | kg
I can point to at least one recent study with contrary evidence that 60% of SMT problems are printing problems. The study is published in the APEX 2002 conference proceedings, a joint effort between Aglient and Nokia entitled 'Paste Inspection Study
Electronics Forum | Mon Mar 04 17:52:59 EST 2002 | davef
Yes, providing the surface of the via is solderable. * If so, how much paste? => Vias come in various sizes. Boards vary in thickness. So, the amount of paste to fill a via varies. Roughly, you�ll need twice as much paste as the volume of the via
Electronics Forum | Wed Mar 27 19:26:53 EST 2002 | ianchan
After a whole night's self review, I think we can term the slant/tilt as "floating 0805, yet end-terminals have acceptable solder joint formation". the width portion of the 0805 RES/CAP is (floating)elevated from the PCB pad, yet both (width) termin
Electronics Forum | Tue Apr 16 13:59:33 EDT 2002 | paulausten
They work great as long as your conveyor speed > has been calibrated and checked on some type of > PM schedule. On some oven types these sensors can > warn you to possible problems with the conveyor > speed. Say the oven is calculating that the b
Electronics Forum | Tue May 14 21:07:03 EDT 2002 | ianchan
Hi mates, Yes, the lighter mass is a valid reasoning. in addition to the "lighter (mass) than thou" point of view, 1) the first reason for mounting active Parts (eg. IC, QFP, LGA...) is to minimize the temperature exposure of the Parts to a single
Electronics Forum | Wed Jun 05 13:21:11 EDT 2002 | Hussman69
That's OK, as long as you didn't say breading, I knew what you meant. Well, for a quick fix try placing Kapton tape over the gold. It's not a cure, but gets you product. Next try putting a couple of non-screen printed boards thru the oven and se
Electronics Forum | Sun Jul 14 00:54:49 EDT 2002 | caldon
There are jobs out there....you just need to know where and what. If you are looking at Original Equipment manufacturers (Fuji,Siemens,exc.....) or CM's good luck! 1) you must be able to travel a fair amount 2)you may need to relocate. With that sa
Electronics Forum | Fri Sep 06 13:35:13 EDT 2002 | genny
I'm not talking about buying components. I want to know how would you go about setting up an SMT line from scratch. Or, maybe more specifically, how do I convince management, with data to back up all my arguments, that this is not a good idea. That
Electronics Forum | Wed Sep 11 07:37:11 EDT 2002 | mk
Whoaaaa Genny, Its not that bad!!! The difficulty factor is in assembling your own boards is all releative to how many, and how difficult they are. Most studies show that the vast majority of defects in smd assembly are generated in the application
Electronics Forum | Fri Sep 13 09:16:36 EDT 2002 | bmulcahy
Hi dave, Only back in the forum today to see your query so here goes (1) VIA ,PTH holes -- we found that because the amount of gold being plated is generally less that the amount of HASL that holes can be physically wider. This then (pacticularly o
