Electronics Forum | Tue Mar 28 08:29:04 EST 2006 | davef
Pad design - Standard IPC 20 pitch QFP Thermal pad design - Layout the thermal pad 0mm to 0.15mm larger per side (0mm to 0.30mm larger overall) than the exposed die pad on the package. �Larger than�, as opposed to the same size, is preferred. Obvio
Electronics Forum | Thu Mar 30 07:44:06 EST 2006 | samir
Is your customer hands-off when it comes to what type of process materials you use on their assemblies?? In the world of Contract Manufacturing Hell, you'll have a mixed bag of customers...some, who don't care what materials you use - after all, YOU
Electronics Forum | Tue Apr 11 12:40:47 EDT 2006 | Chunks
Depending on model and/or series, each one has it's own specific manufacturing guidelines you must meet in order to get a successful solder joint. Then you must couple that to what your soldering process is. Assuming you are talking all thru-hole,
Electronics Forum | Tue May 02 16:21:05 EDT 2006 | patrickbruneel
Grant, I personally disagree that lead-free can't be reversed. The reason it went that far is because lead has a bad reputation (lead in gas and in paint)and was probably assumed by the European green politicians as equally bad in solders. When they
Electronics Forum | Tue May 30 13:50:40 EDT 2006 | Dragan
Hi, I ran into a problem and need a solution. It is a 3cm*4cm*1mm 2 layer PCB (6x6 panel) with a LQFP128 package Microcontroller, a resonator and 2 capacitors. What happens is: When i recieve the assembled pcbs from the assembly plant they wor
Electronics Forum | Tue May 30 17:17:08 EDT 2006 | Dragan
Hi, I ran into a problem and need a solution. It is a 3cm*4cm*1mm 2 layer PCB (6x6 panel) with a LQFP128 package Microcontroller, a resonator and 2 capacitors. What happens is: When i recieve the assembled pcbs from the assembly plant they wor
Electronics Forum | Fri Jun 09 12:13:11 EDT 2006 | Chunks
Rob and Pete are both right. "We" had the same problem, with just one manufacturer of the same style QFP (don't want to name names here). We had the same style of QFP from a different manufacture right next to the problematic one on about 3 product
Electronics Forum | Sun Aug 13 00:28:39 EDT 2006 | Ola
Hi, This is very interesting!!!! I work for a company that have recently (2 years back) been extremely difficult to just order such ridiculous thing as o-rings or screws or lubricants, from local vendors that are not within our companys "approved li
Electronics Forum | Wed Sep 13 13:35:06 EDT 2006 | Mitch Crumbstein
It took me awhile to "warm up" to KIC 2000 as well, as I, too, am an old lead-head from way back who used to profile with an old MOLE that used DOS-based software. I've also used the old SlimKIC II and Datapaq as well. I guess what he meant by "old
Electronics Forum | Thu Sep 28 07:57:58 EDT 2006 | cpm
Hi, Expert, Currently, I'm facing a very critical problem on my HAL leadfree finishing PCBs at my customer end. We run the HAL leadfree (Tin, cu and ni) board by using HAL leadfree machine (temperature about 270 deg.C) and go for normal water post c