Electronics Forum | Tue Oct 22 10:23:38 EDT 2002 | davef
ubga and stencil
Electronics Forum | Wed Feb 24 11:00:12 EST 1999 | Steve Schrader
Are the terms "uBGA" and "Fine Pitch BGA" synonomous, different all-together, or is Fine Pitch BGA a subset of uBGA? Thanks. Steve
Electronics Forum | Fri Oct 16 09:46:32 EDT 1998 | Bob barr
I need the following information on uBGA's - body size, ball pitch and ball diameter. Are they a plastic package (with the resulting moisture sensitivity of a PBGA)? Also, does the uBGA put any special requirements on pick and place equipment? Tha
Electronics Forum | Mon Sep 24 20:38:27 EDT 2001 | davef
Mike's comments are well taken. Your technique works fine with BGA, but uBGA are less forgiving. Again, let's take about: * Specifics of the problem. * Amount and method of applying flux. * What's holding the uBGA in-place before the solder ball an
Electronics Forum | Thu Apr 20 13:02:44 EDT 2000 | Robert Patrick
Hi.... I read your message and can empathize. I just joined PDR Infrared Systems. PDR offers an Infrared System for CSP/UBGA with X-Ray or Optical Inspection Packages. You may want to consider IR technology for UBGA before taking the plunge. Hop
Electronics Forum | Wed Nov 21 10:41:03 EST 2001 | arzu
Hello, Sometimes you have no choice other than putting uvias in ubga's-pads. I know examples of high-end mass production of products with ubgas having voids. (no problems, but always voids visable in x-ray) I also performed a DOE a while ago to avoid
Electronics Forum | Mon Jul 12 13:27:35 EDT 1999 | Upinder Singh
Hi all , We are trying to implement the micro-BGA technology at our plant. I need the clarification to the following points: 1. Is underfill required for micro-BGAs? 2. What type of stencil apertures are the industry standards for uBGAs and of wha
Electronics Forum | Wed Feb 22 08:02:56 EST 2006 | dj44
I was looking for an stencil design for a 0.5mm pitch uBGA. Pad size is 0.38mm in diameter. We have been using 5mil stencil with type 3 no clean paste. What size aperture should we be using? Any suggestions?
Electronics Forum | Wed Jun 05 17:13:58 EDT 2002 | Yannick
Hello! I have a strage problem, we made some production with uBGA, BGA, 0201, 0805, and other type of component. We didn't put the uBGA and 0201 and BGA on the board at the end of the line we look a our solder joint and surprise the solder made a
Electronics Forum | Wed Feb 24 12:53:55 EST 1999 | Dave F
| Are the terms "uBGA" and "Fine Pitch BGA" synonomous, different all-together, or is Fine Pitch BGA a subset of uBGA? Thanks. | | Steve | Steve: �BGA�: Micro BGA�. A brand name for a fine pitch BGA from Tessera. Fine Pitch (1) In SMD: Surfa
