Electronics Forum | Fri Aug 10 04:19:05 EDT 2001 | wister
There are lots of voids at solder joint of chips,the thickness of multilayer pcb is 3.2mm,top side have lots of chip component and bottom side has several BGA and QFPs.For top side profile,the preheat time is about 100s,soak time is about 75s,time ov
Electronics Forum | Mon Oct 21 11:49:20 EDT 2002 | sueph
Mike, We are currently wave soldering several assemblies with with a lot of ground plane. The soldering handbook we have in house suggests a preheat temp for metal core multilayer boards of 230 to 270 degrees F' (110 to 130 C'). It was scary at fir
Electronics Forum | Fri Nov 22 12:34:14 EST 2002 | timreisenleiter
I am in the process of sourcing and ordering a BGA rework station. I only have exprerience with the OK-Industries (Now Metcal) BGA-3500 BGA rework system. Any experience/input on other comparable systems would be much appreciated (Pace TF3000, Air-
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 | Mon Apr 18 10:01:33 EDT 2005 | global
The CCA drawing actually does belong to our customer as it is a DOD contract. We were the last ones to ever build the cards but since so much time has passed since the last build all of our PWB vendors like us have probably purged their systems of al
Electronics Forum | Thu Jun 02 11:08:18 EDT 2005 | Interested in The repairable tool
If you have some tool which can be convenient for repairing component mounted with lead free process, please email to me, I am interested in them very much. In my opinion, to repair a SMD component is not difficult. The most important thing is how
Electronics Forum | Thu Sep 01 18:27:28 EDT 2005 | Board House
Hi I currently Manufacture product for Dataradio Inc. in Quebec. and would be interested in quoting your product. We are a Multi-layer facility in Minnesota, we currenty manufacture layer counts between 2 & 18 layers. Line widths and Spacing down t
Electronics Forum | Wed Nov 09 02:24:49 EST 2005 | laxman
Hi Dave, Normally in our country (India) during rainy season the temperature will be 25to 30 �C and RH of 50 to 60%. The reason behind this humidity issue is that recently we have moved to our new facility with centralised air conditioner with Chill
Electronics Forum | Fri Jan 20 09:17:59 EST 2006 | George
Hi "theSaint", We are using SN100C in our wave solder machine. As far as the solder itself, the wave process follows pretty much the same concept as leaded solder. You bring the assembly temp to 90 C or more before the actual wave. Sometimes for mul
Electronics Forum | Fri Nov 17 07:58:06 EST 2006 | markb
SWAG - I also forgot to mention a few things. Our delmaination was always between the large copper plane and the laminate. It is a multi-layered board, so even when the delamination appeared around components (through visual inspection), cross-sect
