Electronics Forum | Mon May 10 16:51:32 EDT 1999 | Ruby Zheng
| Can anyone tell me what the recommended material for molding with thermal expension coeffecient around 20ppm and transparent for lightwave 850nm. Thanks |
Electronics Forum | Fri Aug 08 13:21:14 EDT 2008 | RobP
With AOI it really depends on what you are testing. Not only what criteria, but what different types of components. We run a high volume low mix application for automotive checking for presense, positional accuracy, and all solder joints. We curre
Electronics Forum | Thu Mar 04 16:40:06 EST 1999 | Dave F
| Hi, | | For hand placement you should see about 150-200 ppm of errors (solder, placement, values etc) on a board populated of types such as 1206, 0805, SOT, Tantalum etc. . As for solely wrong components (component at wrong location) you can usual
Electronics Forum | Thu Mar 04 17:32:23 EST 1999 | SMTASSY
| Mario: Interesting analysis. What does "Hand placement versus wrong component should only ave. 20-30 ppm." mean? Is that a subset of errors? Thanks. Dave F | What I mean Dave is that if you have a good (well actualy a great set-up) with all t
Electronics Forum | Wed May 19 14:12:53 EDT 1999 | Glenn Robertson
| Folks, | I am interested in knowing what level of Nitrogen purity you are running in your reflow ovens for standard SMT assembly? | It seems over the last several years people are increasing the Oxygen level in thier reflow oven atmosphere. | What
Electronics Forum | Thu Mar 04 12:44:01 EST 1999 | SMTASSY
Hi, For hand placement you should see about 150-200 ppm of errors (solder, placement, values etc) on a board populated of types such as 1206, 0805, SOT, Tantalum etc. . As for solely wrong components (component at wrong location) you can usualy redu
Electronics Forum | Sun Aug 14 22:58:17 EDT 2005 | crishan
Hi All, I would like help in establishing what is a feasible PPM reject rate from a typical SMD line. As a reference an SMD line consists of, solder paste printer, chip component placement, pick and place IC components and reflow. What is a bench
Electronics Forum | Thu Apr 19 16:54:32 EDT 2007 | flipit
I don't suggest using Pd/Ag or Ag/Pd terminated components unless you are forced to use them. You often see a line of demarcation that suggests a poorly wetted solder joint. I have had bad experiences with Pd/Ag terminated capacitors. Even when so
Electronics Forum | Wed Jan 25 13:04:47 EST 2023 | proceng1
We have only had our Juki about 6 months, but it seems to be a great machine so far. For nitrogen, we have a couple generators. Minimum purity is Tin/Lead = 99.99% RoHS = 99.995% Of course five-9s is better. I do notice a difference in the LEAD F
Electronics Forum | Wed Jul 28 07:59:50 EDT 2004 | cyber_wolf
Ken, With all due respect: Surface mount is surface mount. Whether you are placing 0201's, or PLCC84's the basic concept is the same. So I would surely hope that for the most part my process is transferable. I guess I was too broad when I said "we n
