Electronics Forum: pass (Page 66 of 142)

LGA36 6.5 x 3.5 mm

Electronics Forum | Sun Apr 15 19:55:52 EDT 2007 | darby

Mika, I think you will find all board houses "clean up" their customer's files to suit their shop. Depending on the severity of the change; I think they take the attitude that they will not inform you to avoid an argument going backwards and forwards

What to use SAC305 or SAC405??

Electronics Forum | Tue Apr 17 01:45:16 EDT 2007 | Jane

There are several alloys had been using in the industry. For SMT: most people use SAC305 For Wave: most of them use SAC305,SC100C,SCS7,and SACX0307. Of course, different alloy composition have its own recommended profile. There is no such rule tellin

solder paste alloy effect on high frequency board

Electronics Forum | Wed Oct 10 02:04:10 EDT 2007 | omidjuve

hi we use a no clean solder paste with the sn63pb37 alloy and our high frquency board doesn`t have any problem in test but after this product is finished now we use 2 different solder pastes 1. sn62 pb36 Ag.4 RA tape 2. NC type lead free with Ag i

Solder Paste Inspection Systems

Electronics Forum | Fri Dec 28 08:21:12 EST 2007 | clampron

Good Morning All, I am looking into solder paste inspection systems. I have used a solder paste height inspection system in the past. We have derived less than usefull information from this system as it will only measure the pad that was taught. I h

Tape & Reel machine

Electronics Forum | Wed Feb 06 11:33:18 EST 2008 | Frank

I once worked at a small CM that did this. On the floor we would save the spent tape to be re-used, so the only recurring costs would be the cover tape. Unless it was otherwise damaged the carrier tape was good for a few passes at least. It just h

Inspection Marking after Conformal Coating????

Electronics Forum | Tue Mar 04 10:42:45 EST 2008 | operator

We have a product that requires labeling and serial numbers that obviousely should be put on prior to conformal coating. 1.What kind of labels/ink/sharpe can be used under conformal coating without disolving etc...? We will be using Techspray 2103-1

Prototype SMT & Ltd Prod Line Choices & Advice

Electronics Forum | Mon Mar 17 15:45:59 EDT 2008 | slthomas

Something to consider is the ability to pick from 2mm tape if you're going be placing 0402s. Quads can't really do it (at least they couldn't do it about 6 months ago when we inquired), but you can program two feeder locations for the same feeder and

What caused this reflow issue?

Electronics Forum | Thu Apr 17 07:54:02 EDT 2008 | davef

Our quality types wouldn't allow: Q16 on "1up good board2.jpg", Q17 on "1up good board.jpg", or Q15 on "1up good board3.jpg". They'd probably pass Q13 on "Q13 next to Q14 no-reflow.jpg", if it wasn't part of a bigger issue. Again, you appear to have

What is the rootcause for BGA Lifted PAD after reflow

Electronics Forum | Wed May 21 04:50:51 EDT 2008 | aj

Hi all, We had similar problems a while back. Boards would fail at test but if you applied pressure to the BGA they would pass. Turned out that during the PTH assembly process the Operators were flexing the cards during the insertion of an Oupin C

problem in solderability

Electronics Forum | Wed Sep 10 14:19:51 EDT 2008 | stepheniii

Root cause analysis is simply looking for what caused a problem, then looking for what caused that, and so on, until you reach someone you don't like, or can pass the buck onto. I don't see why Vlad's method is better than tweaking your knobs until y

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