Electronics Forum: viewing (Page 4406 of 7929)

Full IR Reflow versus conventional convection ?

Electronics Forum | Sat Mar 25 16:28:23 EST 2006 | gipos

Chris, Thank you very much for your help.People from ETS were very kind to give us the access code. We have already exhaust control on the oven but seems like need to increase the outer fan capacity. I will let you know. Promissed to send you a nice

Solderability test method (LF) for bare PCB brd

Electronics Forum | Mon Jan 23 03:12:13 EST 2006 | adeline_ko

The FA department is using IPC or J-STD-003 to do the solderability test for the leaded PCB FA qualification. Class A. However, there is no mention of Lead free testing for the PCB bare brd. Can anyone advise whether IPC has release a solderability

Conformal Coat (Urethane) & bubbles

Electronics Forum | Tue Jan 24 10:24:18 EST 2006 | kmorris

We've got a problem here, where we're hand spraying a urethane conformal coat on over a rectangular inductor. The inductor body is a plastic tube, with potting to fill. The top is not always flat (sometimes concave). The problem is that bubbles appea

Conformal Coat (Urethane) & bubbles

Electronics Forum | Tue Jan 24 21:07:17 EST 2006 | davef

We all genuflect to Graham Naisbitt, a generous contributor to SMTnet. Moisture-curing urethanes may form minute bubbles if the coating is too thick or the coating environment is too humid. So, tell us more about your urethane and the method you u

feeder maintenance

Electronics Forum | Thu Feb 02 21:14:16 EST 2006 | ____

Fuji America has feeder maintenance manuals for all of the machines. Some of them are on CD-ROM with a step by step procedure. For parts however, you need to be registered (Fuji Japan) so that you can enter the serial number and find the exact part n

Best contrast for Fiducials

Electronics Forum | Tue Jan 24 10:48:52 EST 2006 | geb

Hi, We are starting to have supplied to us by customers different colour PCBs, which affects the ability of our MPM AP-27 stencil printer to see the fiducials. Has anyone tried and found out what the best and worst colours/ materials are for the fid

Best contrast for Fiducials

Electronics Forum | Tue Jan 24 11:26:09 EST 2006 | russ

We utilize a "keepout zone" around the fiducial that is free of resist, silkscreen, vias, and any other feature. e.g. fiducial diameter of 1mm- we use a 3mm diameter keepout zone. This works very well for us. If the surface finish changes the li

BGA reballing kit

Electronics Forum | Tue Jan 24 15:21:48 EST 2006 | billyd

Hi all. I'm about to invest in a BGA reballing kit, and was wondering if I could get some endorsments or at least some product reviews from any of you who may be now, or have in the past, used any of the kits out there. I'm looking to combine ease of

BGA reballing kit

Electronics Forum | Wed Jan 25 13:38:58 EST 2006 | mrduckmann2000

I have used Winslow preforms several times.....sometimes with great results and others with not so good. It just depends on the BGA. I have a custom ASIC that will not re-ball, Winslow has even had trouble re-balling them. I would suggest using an

BGA reballing kit

Electronics Forum | Wed Jan 25 17:12:41 EST 2006 | adrian_nishimoto

Billy, I think the most versatile kit out there is the RB-2000 system from Mini Micro Stencil. We have not run into a part yet that we could not reball, even ones with a raised encapsulated center. They even make custom screens that match the compo


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