Electronics Forum | Mon Oct 12 08:07:45 EDT 1998 | Earl Moon
| I have datas to substain that a not wetting PCB ( the HAL oxided or not uniform in thickness )if soldered in reflow, it shows voids with X-Ray inspection.The voids are in side all the joints not only on the solder pads levell. | | Is there a techn
Electronics Forum | Thu Oct 08 22:20:44 EDT 1998 | Dave F
| | | I am trying to find out, what possibilities I have, to print solder paste on a board, when the task is to have 120 Microns thickness for the biggest part of the board (85% of the real estate), and then have 250 Microns of thickness on the rema
Electronics Forum | Fri Oct 09 04:08:45 EDT 1998 | Thomas Blesinger
| | | | I am trying to find out, what possibilities I have, to print solder paste on a board, when the task is to have 120 Microns thickness for the biggest part of the board (85% of the real estate), and then have 250 Microns of thickness on the re
Electronics Forum | Fri Oct 02 01:21:08 EDT 1998 | Mike Cox
Kyung Sam, | | Justin is correct, there is definately either a board design problem or the PCB maker issue. Obviously there are many mixed technology boards built in the world so I would lean towards a design issue as the root cause. Should you or
Electronics Forum | Wed Sep 30 18:43:46 EDT 1998 | Graham Naisbitt
Chrys, Please, refer firsatly to J-STD-001 Appendix D. Now, consider: SIR testing will help define the reliability of your finished assembly - it will not tell you how clean it is. Which do you or your customer prefer? Present SIR testing de
Electronics Forum | Tue Sep 22 12:25:31 EDT 1998 | Chrys
| | Hi Jacqueline! | | Do these joints that you're having problems with happen to be on fine pitch solder joints? Are the fillets staying attached to the foot and separating from the pads cleanly? | | If that is true, are there many vias concen
Electronics Forum | Mon Sep 14 14:02:45 EDT 1998 | Bill Schreiber
Dear Larry, I developed the ultrasonic cleaning process for Smart Sonic. It has developed into the most widely used stencil and misprinted PCB cleaning process worldwide. With that in mind, I offer some words of caution. "IT'S NOT THE ULTRASONICS!
Electronics Forum | Thu Sep 17 10:39:36 EDT 1998 | Jim Gustin
| We are a small contract assembly shop hand placing SMT. We recently received a large contract for SMD that will require placement rates of at least 6,000 CPH. I am looking at Fuji, Mydata, Quad, and Zevatech. I have little experience with automated
Electronics Forum | Mon Sep 14 17:39:37 EDT 1998 | Steve A
| I am running composite fixtures on my wave solder machine and after about 500 passes each (1 month)they are showing serious signs of wear in that the composite surface is bubbling up and glass fibers are also starting to show. | The problem here
Electronics Forum | Tue Sep 15 07:54:42 EDT 1998 | Rob Fischer
| | I am running composite fixtures on my wave solder machine and after about 500 passes each (1 month)they are showing serious signs of wear in that the composite surface is bubbling up and glass fibers are also starting to show. | | The problem h
