Electronics Forum | Fri May 08 15:12:23 EDT 1998 | Ryan Jennens
I am running boards with gold fingers on a pallet for masking purposes. The pallets worked fine for a while but know the gold fingers are getting solder on them. We have tried everythin: new pallets, cleaning the pallet and board to be sure there
Electronics Forum | Mon Nov 24 11:19:21 EST 2008 | sjones
I am having problems soldering a Rohs compliant BGA ATMEL AT91RM9200(rohs compliant board) This device recommends a soldering profile from J-STD-20 and a minimum peak package temperature of 250 centigrade,peak 260. However a lot of the other componen
Electronics Forum | Thu Nov 27 10:55:51 EST 2008 | muarty
Hi Steve, Are you actually profiling the BGA itself? By that I mean have you, for example, drilled through the underside of the pcb into the balls of the BGA and attached a probe there? You may find that even although the topside components have a p
Electronics Forum | Fri Jul 13 10:57:04 EDT 2007 | dboudreau
Dear all, we are using the lead-free SN100C solder alloy for wave soldering. We are experiencing wetting problems each time we have to solder a thick board or a board with a large ground plane.I think that maybe we are not using the right flux. I w
Electronics Forum | Tue Apr 27 17:37:30 EDT 2004 | Ren�
We have switched over form Indium's nc-smq92 to > nc-smq92j and are experiencing a ton of solder > balls. Even if the print is dead on we still seem > to be getting them. We never seemed to have this > problem with old paste unless the print was
Electronics Forum | Thu Nov 30 15:18:54 EST 2000 | Rich Z
All, I have a reoccurring issue with the Alpha-Metals WS601, water-soluble paste in that the size 20 nozzle of the auger-type dispenser on my Camalot Gemini II clogs up rather frequently. Every few hours we are having to go in and clear out the nozz
Electronics Forum | Fri Jul 13 12:27:30 EDT 2007 | jseagle
As in more dwell? We see the same problem with through holes connected to power or ground planes. The solder reaches the plane and stops. We are having our boards re-designed to increase the thermal relief and expand the hole size. We are also tr
Electronics Forum | Tue Sep 21 10:53:53 EDT 2004 | davef
We know nothing about Envivar UV 1244 and you weren't real clear about the details of the problem or the materials [eg, ws flux, solder mask, etc], but we'd speculate your adhesion problem goes back to the cleanliness of your board. First by 'alcoho
Electronics Forum | Thu May 24 08:55:25 EDT 2007 | ck_the_flip
Here's some quick things to look for: 1. Does your solder paste feel like concrete, does it roll-up into your squeegee blades, and stick to your stencil? If so, your problem is the solder paste. The mixture of powder and flux, or metal load is ou
Electronics Forum | Thu Apr 15 16:07:37 EDT 2004 | barry
Hi there all, we are having problems with 2 qfp devices. grainy poorly reflowed solder joints. One 100 pin .5mm pitch, and one 64 pin .5 mm pitch . Both of these devices have a thermo pad on the back of them (pad area soldered to back of device)which
