Electronics Forum | Tue May 26 14:39:40 EDT 2009 | boloxis
QFN or MLFs are mainstream now, QFNs already evloved to much more complex versions now like matrix pins, stacked dice and flipchip versions. IPC 610D already includes them, just make sure the pins have solder plating, the PWB pads have soldermask in
Electronics Forum | Wed Mar 20 07:57:30 EST 2002 | davef
Purchase: 7095 - Design and Assembly Process Implementation for BGA's Make every effort to distribute the test pads, because if you keep them massed at the ball, it would be a bijundo kick in the BGA rear section, when all of those pins released.
Electronics Forum | Tue Mar 30 10:43:21 EST 2004 | Robert
I could use some help too. I have a bunch of SMD 4 Pads Inductors from Central Technologies. The dimensions of the part is 11.30x13.9x6.9 . I've called four companies already and none were able to find a carrier for this part. These parts are on plas
Electronics Forum | Thu Sep 07 03:57:39 EDT 2000 | Steven Cheung
Does anyone know of a freely-available document which discusses the main considerations of BGA assembly and inspection (x-ray?). l need to know about pad sizes and inspection standards and when to underfill and when not to etc.. l am looking at ass
Electronics Forum | Sat Jun 25 15:20:03 EDT 2016 | skipper6567
I have a mini/micro transformer that is mounted on a pcb inside my lowrance gps/plotter. I have removed it from the pcb. It has 5 through hole pins, 3 pins out bottom one side and 2 pins out bottom on opposite side. The transformer has yellow tape ar
Electronics Forum | Wed Apr 07 11:21:26 EDT 2004 | stefwitt
Hi Dilbert, it is a step up transformer from 3 phase 208 to 3 phase 380. Each machine does not draw more than 3 Amps per phase. However, circuit breakers are rated at 15 Amps. The transformer has three power outlets, each one has a Perilex (European)
Electronics Forum | Tue Apr 11 10:30:46 EDT 2000 | Jeremy Smith
I am having a problem with some joints on a 100 pin pqfp and few different soics on one particular board. When viewed a 8x with a "Mantis" inspection scope the joints look as though they wetted to the ic leg but when probed the leg will pop loose.
Electronics Forum | Fri Nov 18 12:35:15 EST 2011 | rway
As the article eludes to, you still need probe access to measure the pins with TestJet. One thing I wanted to add was the use of JTAG for use with Boundary Scan. Certain devices have JTAG capability, but not all JTAG devices are Boundary Scan compa
Electronics Forum | Sat Feb 17 14:21:54 EST 2007 | Muhammad Haris
Hi All, I am using YV100Xg YAMAHA Pick and Place Mounter Machine and I am facing a tilting problem of PLCC 84 and QFP 240 pins ICs. I deeply checked about their vision files and place them on the double sided tape and found them ACCURATE on their pad
Electronics Forum | Wed Jul 14 16:59:52 EDT 2010 | swag
Solder paste on the pads will keep part aligned. If you do not use paste, you will need to apply tacky flux. You should not run without one or the other.