Electronics Forum | Tue Sep 14 14:07:45 EDT 2010 | grahamcooper22
Hi Gani, HASL is normally very good for solderability providing there is a good consistent coating of HASL on the pcb pad. But it is not unusual to have a very thin coating of HASL on the pad and this is poor for solderability. You then have tin/copp
Electronics Forum | Fri Sep 17 03:13:00 EDT 2010 | grahamcooper22
In HASL pcb coating you need to fully coat the pads with solder and then blow off any excess solder to leave a nice coating on each pad. Generally pcb manufacturers try to give you a flat pcb pad to make your solder paste printing more consistent. To
Electronics Forum | Tue Sep 14 17:06:25 EDT 2010 | asksmt
Hi All, I have designed 4 Layer PCB with one 28 pin QFN PKG. I have got complaint from Production that the pads which connected to thermal pads (gnd) thru trace is bridging with solder and because of this bridge, pins are not getting soldered prope
Electronics Forum | Thu Sep 16 13:12:43 EDT 2010 | gregcr
Hi All, We have been running a Novastar spartan 8S wave solder machine for a number of years. We actually do very little wave soldering and this machine has served us well. I have always been of the opinion that with the small pot and simple fluxe
Electronics Forum | Wed Sep 22 15:33:54 EDT 2010 | davef
Comments are: * First, no one is looking at your posting. You need to post in the 'SMTnet Production Forum' [top of the page]. This 'SMTnet Site Support Forum' is for whiners that want to complain to Neil about problems in logging-in, font that's to
Electronics Forum | Mon Sep 20 18:27:13 EDT 2010 | ratsalad
dman, This happened to me once on a GSX, but the head was not all the way up. I ended up shutting the machine down, inserting a bypass key so it thought the head was lowered then turning it back on. Then I told it I wanted to raise the head, hit
Electronics Forum | Wed Sep 29 09:35:39 EDT 2010 | blnorman
Can any body help me that how can I check the > strength of the 0603 capacitor & how much it > should be? Is there any standard for the > soldering strength of the Diffrent SMT > packages. Manjeet singh I'm not aware of a standard that provides
Electronics Forum | Wed Sep 29 16:04:29 EDT 2010 | hegemon
In my experience, the best way to do a lifted lead inspection on a QFP is by laser height measurement. It is very difficult to consistently catch a lifted lead with only a top down camera. As you say, too many false calls, and still some escapes.
Electronics Forum | Thu Nov 04 19:55:49 EDT 2010 | eadthem
The best method i have for the few lifted/bent lead issues we have is i use a ic/bridge inspector with all its default options to check for bridges and solder at the tip. then i add a solder inspector but this time accrost all pins at the downslope o
Electronics Forum | Wed Sep 29 08:26:03 EDT 2010 | babe7362000
We are Currently running a Board and it seems that the SOT-223's on the bottom side have flux and water trapped under the part. Nothing has changed in our process and this is the only board that it is happening on. We are using Kester R562 water wa
