Electronics Forum | Thu Feb 10 04:07:29 EST 2000 | Wolfgang Busko
Jeff: We had a similar problem a couple of years ago with boards from one specific subcon. At first sight the joints looked well formed sometimes with a little bit more sometimes with a little bit less solder but still in limits not to be worried abo
Electronics Forum | Wed Dec 13 11:11:20 EST 2000 | CAL
CONFUSED???? The the "BIG-chip-in-the-middle" on my image is IC732. IC304 is the 52pin QFP to the right of the "BIG-chip-in-the-middle".If it worked when the "Thingy" was there and does not work when the "thingy" is not there good indications are you
Electronics Forum | Fri Dec 08 19:08:52 EST 2000 | Mike Konrad
I do not know which specific flux you are using, but here are some general guidelines. If your wave soldering machine uses a foam fluxer, then there are foaming agents in the flux. Under �normal� conditions, the volatiles (including the foaming age
Electronics Forum | Thu Aug 31 18:59:55 EDT 2000 | Brian W.
Our customers use OSP, HASL, immersion tin and immersion gold as board finishes. If I recommend a finish to the customer, it is one of the immersion finishes or OSP. Those finishes have the advantage of a flat surface to deposit paste. HASL has va
Electronics Forum | Thu Aug 10 12:14:12 EDT 2000 | Charles
It looks like a giant dpak device but with 5 leads. The problem is that on approx 3% of our boards one more pins are open circuit. It appears that the pins are not in contact with the pads. Board is HASL finish IR oven Paste Koki 953i. If you have a
Electronics Forum | Thu Jul 06 20:46:17 EDT 2000 | Dave F
Mark: An area of increasing interest to all of us. From the SMTnet "Terms & Definitions" (or whatever they call it) Globtop. Encapsulant. Encapsulating. Encapsulation. Potting. Enclosing an article in an envelope of adhesive or encapsulating co
Electronics Forum | Tue Jun 13 21:57:01 EDT 2000 | Dave F
Todd: You say: "... solder masking between the lands of fine pitch components can cause stenciling problems and or manufacturing problems." I say: Fine pitch components without solder masking between the lands can cause stenciling problems and o
Electronics Forum | Mon Jun 12 22:02:48 EDT 2000 | Dave F
Jason: Wave soldering is the coolest thing!!!! First, so, what�s the chemical analysis of this white res? Can you point us to either tin, rosin, or something else? Second, how do you know that you are making these white residues? Could your boar
Electronics Forum | Tue May 30 11:51:43 EDT 2000 | JAX
Sal, I have seen this problem placing SMT connectors which exceed 60mm in length. Although I did not use siemens equipment at the time I am not sure if they will place enought force to seat the entire connector flush to the board. They have a maximun
Electronics Forum | Thu Mar 16 14:04:14 EST 2000 | Cartman
Greetings. My company has a VOC-Free no-clean wave solder flux with 4% solids. I have a number of questions as they relate to our ICT Fixtures. Currently, we're encountering the following issues: 1.) PM on probes....What is the recommended PM p