Electronics Forum | Tue Apr 27 17:22:40 EDT 1999 | Dave F
| Board Experts | | I am fighting with a board house about a delamination problem.. First the facts | 1) 10 layer board .063 thick HASL Finish Aprox 16 in x 17 in. | 2) 150 Boards with this part number built with the same reflow oven settings (2
Electronics Forum | Mon Apr 26 14:04:59 EDT 1999 | Steve Gregory
Hi Murray! Justin pretty much summed things up...covered all the points. So I'm just gonna give you my preference of what I like other than HASL finish. Electroless Nickle/Immersion Gold...nice flat pads...hmmmmmmm, Steve likes flat pads. OSP's hav
Electronics Forum | Sun Apr 25 11:18:45 EDT 1999 | Earl Moon
| Hello all, | | Been doing some comparisons on joints made using the soldering iron versus reflowed solder paste (on a QFP package). The difference is quite significant: the joints made by the soldering iron are inconsistent and in many cases not
Electronics Forum | Fri Apr 23 14:14:49 EDT 1999 | Chrys Shea
| Hi everybody, | | I would like to bench mark the quality out of our wave soldering m/c as far as DPPM levels are concerned. Can somebody provide me with some figures at their site or anywhere else for the same. | | Thanks | Upinder | ====== | We
Electronics Forum | Wed Mar 17 19:00:14 EST 1999 | Earl Moon
| | | We are having a small number (~2%) of our boards pass our manufacturing diagnostics, fail once they reach the customer, fail when they get back to us and then start working again after handling them for a short time. We have eliminated a lot o
Electronics Forum | Fri Mar 12 11:59:50 EST 1999 | Ray Morford
AVX and a few other companies make these chip transient voltage suppressors (TVS) parts that are a real *PAIN* to use. According to AVX: "Due to the semiconducting nature of the doped Zinc Oxide (ZnO) ceramic material, SMT TransGuards are no
Electronics Forum | Thu Dec 03 13:39:52 EST 1998 | Russ M
| | | | I have some 1.25 mils Al wire bonding chip on board process. After epxoy-based encapsulation, I do some aging test. How can I "see" or prove that there is a "wire break" exist due to the tension of thermal cycling? How can I know the failure
Electronics Forum | Thu Apr 22 15:27:44 EDT 1999 | Hugh M
| | I keep hearing about polyimide stencils, but what are they like in terms of registration and aperture accuracy? | | | You are hearing about polyimide as in polyimide film as Kapton (TM Dupont). This material is the stuff of flex and rigid/flex c
Electronics Forum | Wed Oct 28 19:45:33 EST 1998 | Ron Gilman
I will try to answer some of your questions. My name is Ron Gilman and I am President of Chipscale Robotics here in Fremont California. We manufacture Die Pick & Place equipment and would be happy to send you brochures. Please email me with your a
Electronics Forum | Thu Oct 15 14:23:31 EDT 1998 | Earl Moon
| I have a problem with measling on our PCB's. We saw it on our FR4 PCB's at final assembly yesterday. Is this a defect from the board vendor or something we did in our assembly process when building the PCA's (thru hole). Could the wave solder ma