Electronics Forum | Fri May 07 08:06:03 EDT 1999 | Hon Choi
| | Hi all, | | | | We're starting up tests for pin-to-paste and, well, things could be better. We're testing different pastes and we're testing different apertures rules and, well, we're still testing. It's coming close and we're getting pretty
Electronics Forum | Tue Mar 27 09:21:45 EDT 2007 | realchunks
Hi Donovan, I guess it really depends on the product, how it's built and how you'd stress test it. Many arguments can be made about how far to test, then when one fails in the field was it due to manufacturing or test? But the bottom line is most
Electronics Forum | Sun Sep 18 18:57:50 EDT 2011 | darby
Thanks ISD, I had a look at those papers from Freescale regarding the LGA "optimal zero-g offset after PCB mounting". Had me going for a while until I realised it was in relation to the finished product. Hmmmmm. LGA/QFN type. They can be a little t
Electronics Forum | Fri Apr 18 08:24:49 EDT 2003 | tsongshe
Hello,all.these days I met many skewed transistors after reflow soldering.we 've tried many ways attemting solving it thoroughly...changing the aperture pattern,solder volume and even changing the size of pcb pad,but the results are not very good.eve
Electronics Forum | Sat Aug 07 11:10:03 EDT 1999 | JohnW
| Could someone give recommendation on the stencil opening for printing epoxy on HAL FR4 PCB for 0805 and 0603 size chips capacitors and resisitors. | My regular stencil manufacturer recommend the following: | Thickness: 8 mils | 0805 opening: Oblong
Electronics Forum | Wed Jun 17 14:34:22 EDT 2015 | rgduval
Thanks for the shot at it :) So, I discovered the "feeder teach" feature that UIC has in the software. It's fantastic...except it doesn't give the option to have the PTF deliver a part to the belt. That was mildly disappointing. In the help files
Electronics Forum | Tue May 26 14:50:07 EDT 1998 | Dave F
| | I'm reviewing my board fab spec. It calls for a minimum SnPb thickness of 50 microinches on HASL PWB's. I've looked at other specs that call out anything from 30 to 80 microinches, and others that just say the copper pad must be covered and sol
Electronics Forum | Fri Jan 15 09:11:28 EST 1999 | Steve Gregory
| Due to an foul up on my part, a circuit board ECO snuck up on me and I have a solder paste stencil that doesn't quite match the board. Two pads are off by about half a pad each. | | Can the solder paste stencil be modified? If so, what is the tec
Electronics Forum | Fri Dec 01 12:02:15 EST 2000 | blnorman
I have over 10 years experience in aerospace materials, part of which was involved with vacuum casting inert propellant formulations. These propellants are in the range of 80 - 90% solids loaded with viscosities of 15 kP. I'm not sure where I could
Electronics Forum | Thu Apr 27 21:00:32 EDT 2000 | Dave F
Scott: I�m not familiar with some of the things you�re talking about, but let me: * Agree with Russ & Peter regarding immersion silver. * Give some snips of information on the substrate side of things that might help you to tie this together. � FR-1
