Electronics Forum | Wed Apr 16 01:40:17 EDT 2003 | praveen
Hi , We are using water wash solder paste to solder the SMT LED's manufactured by Chicago Miniature lamp (CMD93-21 & 22)and Kingbright. Achieving the solder fillet , wetting has no issue but we observe high fallout at the functional testing. If we do
Electronics Forum | Mon Apr 12 10:39:48 EDT 2004 | Ron Herbert
Correct preheating of the assembly is critical. Check with your flux manufacturer regarding the recommended topside pcb temperature as it enters the first wave. It is important that this temperature be achieved without burning the flux on the bottom
Electronics Forum | Tue Jul 22 09:05:14 EDT 2003 | davef
Any-Layer Interstitial [Inner] Via Hole (ALIVH). In printed circuit board fabrication, a registered mark of Matsushita Electric for a filled microvia structure in all layers for applications requiring small-size, lightweight build-up PWB to achieve
Electronics Forum | Mon Aug 25 00:31:53 EDT 2003 | Dennis O'Donnelll
It could be moisture in the BGA. You should always bake the BGA before installation of course. But most likely you are usingf too much heat or too fast of a ramp speed. Make sure your top heater temp is below 230C. Set top heater to 220C, then adj
Electronics Forum | Thu Feb 19 19:34:52 EST 2004 | Tom B.
Jim, There are 2 thoughts to this technology. SMDP (Soldermask Defined Pads) Can achieve more uniform opening of the land, yet as you know Regisration shift of mask can become a problem. Also there has been debate as to whther SMDP cause crack p
Electronics Forum | Thu Apr 08 23:08:56 EDT 2004 | Ken
Well, the precision glass is for upward looking camera's. It essentially is a "perfect part". Vapor deposition lithography on glass (for Cte stability)....basically the part pattern (or part fids) is compared to its target location (same pattern on
Electronics Forum | Mon Jun 14 21:02:50 EDT 2004 | hap
it is not practical to target an exactly 1 mil film thickness, the materials manufacturers do not give an exact solid content figure but only a target range. temperature and batch preparation also play a small role. You could probably target 1 mil p
Electronics Forum | Fri Jun 11 03:50:39 EDT 2004 | Scott B
We currently have an issue with via's in pads which we have been living with for some time. The problem has now escalated with the need to increase the via hole size to achieve PCB fabricators aspect ratio's. We are now not only experiencing solder d
Electronics Forum | Tue Jun 15 10:05:07 EDT 2004 | azdback
Thanks for your input Mark. I have looked at the features of this software and it would help us achieve our goal in the efficiency field by creating programs and getting them ready to the floor faster than the way we are currently doing it. The visua
Electronics Forum | Fri Jul 23 06:18:12 EDT 2004 | Chris L.
Good Morning Everyone, I have a question that probably doesnt have a definitive answer. I have been asked to try to establish a norm for RMA rates. My first thought is the goal is always 0% but knowing that that is not readily achievable, I am in se
