Electronics Forum | Wed Dec 08 17:58:44 EST 1999 | Dave F
Dave: You should see a solder smudge on the gold plating where the ball was attached, if there is (was) solder reflow during either the (1) BGA fabrication, (2) your BGA attach, and / or (3) your BGA removal. You rework will not remove the solder
Electronics Forum | Fri Dec 03 18:17:12 EST 1999 | Dave F
Dave: There's lots of stuff on the web describing BGAs. Examples are: http://www.smtnet.com/bookstore/publications/0speckdo1/s1.html http://www.smtnet.com/bookstore/publications/0shutcco1/ch1p2.html http://www.citizen-america.com/OEM/bga/process
Electronics Forum | Wed Dec 08 10:10:41 EST 1999 | John Thorup
Hi Dave I think you just provided the key to understanding the problem. By your description you are talking about a CBGA (ceramic). These typically have balls composed of 10/90 Sn/Pb which melts at a higher temperature than the 62/36/2 Sn/Pb/Ag (or
Electronics Forum | Fri Jan 18 18:19:38 EST 2008 | arun2382
Is normal DI rinse cycle enough to wash away all residue after SMT assembly of high density substrate? This substrate would later be over molded to form MCM module package and I am seeing delamination in high density areas of the substrate at MSL3
Electronics Forum | Tue Feb 20 07:31:45 EST 2001 | Nick L
0.076 ~ 0.2 um(micron) but our substrate gold thickness is between 0.3~1.2um. Is there any related to the plating process of substrate! And how can they control this thickness?(May be I should ask substrate vendor their controlling limit). If this i
Electronics Forum | Thu Mar 08 15:21:43 EST 2007 | pima
To be honest this product its only a part of bigger PCB, so we have only substrate with 3 FETs on it so no other components at substrate occurs and all substrate are staying at metal fixture. WE have already window pan aperture. WE producing this pro
Electronics Forum | Wed Feb 24 16:15:50 EST 1999 | Justin Medernach
Fab Gurus, (Earl) What are the disadvantages of using paper phrenwhatsit as a substrate. I want to justify changing a substrate from paper to chem3 or FR4 and I need some info regarding long term failure issues, etc. Thanks, Justin
Electronics Forum | Thu Oct 22 06:49:21 EDT 1998 | Stan
I am looking at using a IMS substrate for a new product can any one tell me where I can get some good information on this product???
Electronics Forum | Thu Oct 22 08:05:48 EDT 1998 | Scott B
| I am looking at using a IMS substrate for a new product can any one tell me where I can get some good information on this product??? | Bergquist have helped us in the past with trials.
Electronics Forum | Thu Oct 22 08:07:55 EDT 1998 | Scott B
| | I am looking at using a IMS substrate for a new product can any one tell me where I can get some good information on this product??? | | | | Bergquist have helped us in the past with trials. | | Their web page is:- http://bergquistcompany.c
