Electronics Forum: conveyor belt

Inner short

Electronics Forum | Wed Aug 29 05:30:30 EDT 2018 | teresat2

I guess these boards only used Fly test. Flying needle test is one of the methods to check the electrical function of PCB (short circuit test). The flight test machine is a system for testing PCB in a manufacturing environment. Instead of using the

Re: Profiling on populated or unpopulated board?

Electronics Forum | Fri Feb 19 12:39:53 EST 1999 | Brian Stumm

Joe, When developing profiles I recommend using a board that is populated the same way as the reflow will see in actual production, no more components, no less. My company manufactures ovens and part of our QC Procedure is to make sure the thermal

Re: PCB Material selection

Electronics Forum | Mon Jun 26 20:34:14 EDT 2000 | Dave F

Gary: Allow expand on this topic a bit. Back in the gray skied past when people wore calculators on their belts, rather than pagers n Palms, and didn�t drink California spill, they used HASS that you mentioned and HALT (Highly Accelerated Life Test

Re: BGA reflow profile

Electronics Forum | Tue Jul 28 17:23:58 EDT 1998 | Robert Steltman

We are about to run our first BGA devices and would appreciate some confirmation on a few points. First some details: PCB & Device: ============= 1) 16 layer (4 power, 4 gnd, 8 signal) 2) gold on nickel finish 3) ceramic

Re: BGA reflow profile

Electronics Forum | Tue Jul 28 02:22:59 EDT 1998 | Bob Willis

Here is what I would do faced with your problem. First I would profile a similar board or use an existing profile. From there I would place the dummy device on the surface of a sample board with a thin thermocouple soldered to the board surface under

Re: Wave Solder balls

Electronics Forum | Wed Nov 04 02:53:53 EST 1998 | Earl Moon

Micheal, What does your profile look like for the wave? What profile does your flux say you need? My guess is it is not your profile, our testing with solder balls found that the mask on the boards was the largest contributor to solder balls

Solder Spotting on Gold

Electronics Forum | Thu Aug 06 09:51:20 EDT 1998 | Bob Willis

This text may be of interest to any one with tin lead spots Guide to Solder Spots - A New Plague in Manufacture ? So what are solder spots ? They appear to be the next big problem in modern reflow assembly in fact in any process that involves solder


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