Electronics Forum | Mon Sep 13 07:14:34 EDT 2010 | mun4o
Hi all, we have two smd line, with 2 topaz X each.Software for optimizing is PPS v.8.0.The problem is that when PPS optimazing the programme, IC, diodes and other polarity components are with wrong orientation.But, I see the orientation onli when str
Electronics Forum | Tue Sep 14 00:35:47 EDT 2010 | sachu_70
The PPS helps to prepare a program off-line without affecting on-line production. However, there are certain efforts that we must consider, such as identifying the part orientation on feeder vis-a-vis its placement orienation on PCB, and confirming s
Electronics Forum | Thu Sep 16 09:29:21 EDT 2010 | san_1023
Weller and Hakko have some good soldering > stations, hot air SMD rework system and BGA > rework systems: _a class=roll > href="http://www.wellersoldering.blogspot.com/" > target="_blank"_http://www.wellersoldering.blogspo > t.com/ _/a_ I am t
Electronics Forum | Mon Sep 13 22:32:41 EDT 2010 | genesan
Hi all good morning and need advice from expertise here. One of my customer complain that they have constantly issues with one of their product and ask us to do cross section.The report show there was “no wetting to the PCB copper pad” and cause the
Electronics Forum | Mon Sep 13 22:58:49 EDT 2010 | genesan
Hi all good morning and need advice from expertise here. One of my customer complain that they have constantly issues with one of their product and ask us to do cross section.The report show there was “no wetting to the PCB copper pad” and cause the
Electronics Forum | Tue Sep 14 02:46:17 EDT 2010 | grahamcooper22
Hi Gani, Looking at the pictures in the report it looks as if there is a thin coating of solder on the pcb pad....but it looks like the BGA sphere was barely in contact with the pad. This could be caused by insufficient solder paste on this pad...may
Electronics Forum | Tue Sep 14 14:22:11 EDT 2010 | grahamcooper22
If the HASL was poor quality and very thin you would find this defect....but you would expect to see it on more pads also. Also, you'd expect to see your solder from your solder paste either dewetted on the pad or reflowed onto the BGA sphere making
Electronics Forum | Thu Sep 16 01:54:46 EDT 2010 | sachu_70
Hi Gani, Immersion Ag finish has lesser shelf life as it can get more easily oxidized on exposure. However, I see concern in your Reflow profile. A few questions: Have you compared your reflow profile to the solder paste manufacturer's recommended pr
Electronics Forum | Fri Sep 17 03:03:29 EDT 2010 | grahamcooper22
Hi Gani, looking at the HASL icture and the poor wetting of the solder over the pads I would imagine that the HASL coating is very thin on the pads and in actual fact isn't 'solder' but is tin /copper intemetallic and this has poor solderability. It
Electronics Forum | Tue Sep 14 10:10:39 EDT 2010 | teamcanada
We are having an issue with a PCB supplier. Their Tin HASL layer seems to be the problem. We have triedworking with them to correct their process. What seems to have helped is lowering their temperature of the Tin dip from 540 F to 510 F.We still ha