Electronics Forum | Wed Jul 09 11:58:03 EDT 2003 | sam
When we try another test by using less solder paste, we found under the microscope that the solder was actually stick on the LED gold surface, but not having good wetting. By this finding, we can basically conclude that it was poor solderability caus
Electronics Forum | Wed Jul 09 13:48:03 EDT 2003 | russ
Sam, You may want to be careful with your analisys, reducing paste volume also reduces flux volume. Flux is there to promote and aid in wetting. by reducing flux you may have initiated the poor wetting yourself with the experiment. Just anothe
Electronics Forum | Fri Jul 04 19:39:08 EDT 2003 | AlCapone
i'm newbie to this forum, I have a question about Cp and Cpk, nowaday, what number of ppm your company targets. Also as a SMT engineering you guys operate the whole smt line from SPM to ICT, has your company let you calculate the Cp and Cpk or there
Electronics Forum | Fri Jul 25 13:12:22 EDT 2003 | Bill
Brad, If you are considering ERSA equipment, we have a 2001 ERSA Versaflow High Speed Selective Solder Machine for sale. Please contact me at b-morgan@carolina.rr.com or call me at 704-795-6610 Ext 13 if you would like details. Also, please visit ou
Electronics Forum | Wed Jul 09 15:54:51 EDT 2003 | Louis
I need advice from someone who has already soldered this part or similar fine-pitch BGA with metal heatsink on top Should I solder it in the oven or it's better with a rework station (IR 550A Ersascope) Thanks All
Electronics Forum | Thu Jul 10 15:05:30 EDT 2003 | stepheno
Don't forget about moisture sensitive devices already on the board if you are reflowing the entire board again. No doubt the other BGA's have been absorbing moisture since the boards were first reflowed. You may have to bake the boards before reflo
Electronics Forum | Fri Jul 11 03:35:44 EDT 2003 | emeto
Hi there is one thing. I had the same problem before and after examine it I found the problem is in the pads. The pads on the board were bigger then usual and the distance between them also was a little bit longer.Theese two are the best precondition
Electronics Forum | Sat Jul 12 18:05:06 EDT 2003 | ronald mupfeki
Our company wants to establish a department that deals only in rework and repair of populated through hole & smt pcbs from outside companies .However given the wide variety of suppliers & with all equipment looking like it has been branded can anyone
Electronics Forum | Wed Jul 16 10:55:08 EDT 2003 | stepheno
You might want to check your input power. It is never "clean" but you might have too many spikes and transients. I've seen line monitors used and it was an eye opener how much noise there was on the input power. If you had a CPU go, you might want
Electronics Forum | Mon Jul 14 18:35:14 EDT 2003 | Dave
But I think that these free products are basically viewers- I want an application that outputs a file of positions and rotations, to make a placement file. I think GC PowerPlace does it, but that looks expensive! Am I just misunderstanding what thes