Full Site - : whit spots solder mask (Page 6 of 10)

Re: Residue/Measuring Flux

Electronics Forum | Wed May 27 15:09:30 EDT 1998 | Dave F

| | | | We recently made the switch to no-clean and the wurface mount is turning out beautifully. However, the wave solder process continues to put up a fight; we are getting a white residue on the surface of the PCB. The residue is not locali

Re: PASTE LEACHING

Electronics Forum | Sat May 06 08:46:46 EDT 2000 | Dave F

Sal: Now you�re talkin�, buddy!!! Darrell is correct. All things being equal, thermal relieved vias (and through holes) should be the hottest spot on the board at reflow temperatures. Vias are gonna take on solder like drippin�s take to biscuits.

Re: bare board problem

Electronics Forum | Fri Jun 18 11:37:10 EDT 1999 | Earl Moon

| | | | first of all what is the technical term for the small amount of solder on a plated pad. we are getting poor screen printing gasketing on a 20 mil qfp due to this solder not being even or too high in spots and not covering the length of the pa

Need Expert Support

Electronics Forum | Tue Mar 13 16:05:30 EST 2001 | rob_thomas

Hi, can you definitely attribute the 30%yield to poor bga soldering? What is your high flyer defect encountered on the failed boards.Is this ICT ,flying probe ,functional test yield? Can you determine a defect pattern? Did your subcontractor provided

Re: Residue/Measuring Flux

Electronics Forum | Wed May 27 15:54:09 EDT 1998 | Chrys

| | | | | We recently made the switch to no-clean and the wurface mount is turning out beautifully. However, the wave solder process continues to put up a fight; we are getting a white residue on the surface of the PCB. The residue is not loca

Re: Need help on DFM rules

Electronics Forum | Wed Jun 02 15:27:27 EDT 1999 | JohnW

| | Hi, | | | | To improve the Design For Manufacturing I am currently looking to write down some design rules that can (and should be) used by our engineering department. | | | | Can somebody help me get started or give some usefull tips on where

Foam fluxer maintenance, storage and cleaning

Electronics Forum | Mon Nov 09 09:44:22 EST 2015 | davef

Purpose. This describes setting-up a wave soldering system set-up for a new assembly design or checking a wave solder machine operation with a test board. Applicability. To be used for new design printed circuit assembles and during machine accept


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