Electronics Forum | Mon Feb 04 20:27:25 EST 2002 | davef
1,000 G ohm ||100 M ohm Dielectric Constant ||9.5 ||4.9 Loss Factor ||5 - 20 ||200 * E indicates exponent Continuing: * Spacing between same plane traces effect the electical parameters between the traces. * Dielectric materials used between diff
Electronics Forum | Fri Oct 08 10:08:48 EDT 1999 | Glenn Robertson
| | | | I have a board, 4 spacers needed to be soldered on the board | | | | first with the normal 62Sn37Pb alloy. Then, capacitors are manually soldered on the boards. The density of the board is quite high. If we wave soldered capacitors first,
Electronics Forum | Wed Nov 09 17:50:42 EST 2022 | cyber_wolf
Take all of the nozzles out that are being used to place these parts and look at them under a microscope closely for blockages or dings in the surface that contacts the component. Check that the nozzle travel moves up and down smoothly and freely wi
Electronics Forum | Thu Nov 30 19:55:30 EST 2006 | greg york
This may be worth checking out are you sure it is flux residue and not undercured plasicizers coming from solder resists due to the higher Lead Free temperatures killing the undercured resist, this causes many no faults found and bridging, solderball
Electronics Forum | Mon Dec 18 04:03:30 EST 2006 | greg york
Good solvent wipe will normally show some discoloration of the same colour as resist, but not scientific enough as you cant gauge the amount coming off, ideally none. But is an indicator of the issue. I have been meaning to do a swab with an indicato
Electronics Forum | Wed May 31 05:32:14 EDT 2000 | F.Frimpong
Hi All, I am looking to design some test structures on GaAs and High resistivity silicon for the high frequency characterization of interconect materials. (Organic substrate, vrs LTCC, Flipchip bump configuration: (metallurgy, shape height etc) conta
Electronics Forum | Sat May 01 07:18:38 EDT 2004 | davef
You bet the cracks will give you high contact resistance.
Electronics Forum | Fri Apr 25 08:09:13 EDT 2003 | razor
Thanks for response. I do wish to qualify that I got the alleged role of Nickel use for corrosion resistance from an article authored by Jason Gjesvold, IS IT REALLY BLACK PAD?, "Phosphorus rich Ni alloys are often used for corrosion resistance duri
Electronics Forum | Fri Apr 30 07:45:15 EDT 2004 | Frederic
Hi all What adhesive you recommend to catch thermocouple to the board? (resistant to high temp and easy remove from PCB) Thank Frederic
Electronics Forum | Fri Oct 01 09:25:50 EDT 1999 | Gian.D
Can someone suggest what material I have to use to protect components by electrical discharge on ptfe based boards? It should have high resistivity, thermal stability (-40 +70 'C),perfect adherence on ptfe... Many tahnks
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