Electronics Forum | Thu May 06 11:37:48 EDT 2010 | davef
There is no specification. Shear tests are very material / operator dependent. BALL SHEAR TESTING OF RAW BGA DEVICES: A total of 3 devices were subjected to ball shear testing. Results of the testing indicated shear values in the range of 0.7-1.25
Electronics Forum | Mon May 10 11:24:33 EDT 2004 | Charly
Encounter solder ball crack after reflow, found the solder ball is out of shape after reflow, cross section view found that the solder mask opening is not good ( when we do comparason with diff. supplier substrate.) Does the solder mask shape will af
Electronics Forum | Fri Jun 17 23:31:12 EDT 2005 | kenscj
Hi all, currently, we are seeing BGA problem like solder ball misalign, void, solder short (all under BGA, tested with 5DX), after reflow. We examine the solder ball (raw material of BGA), and see that the ball surface is not smooth, will that affe
Electronics Forum | Fri Jul 14 14:46:59 EDT 2006 | Gman
Hello Folks, Has anyone come across this fascinating but undesirable surface appearance of BGA balls. I am not sure what it is called but I came across the term Black Island. To me it looks more like a disco ball. Lets just say the solder ball looks
Electronics Forum | Thu Sep 04 03:27:52 EDT 2008 | akareti
All, Does anyone have experience with underfill 300balls BGA connector? We have a component with 300balls BGA connector that connectorize with Flex. Customer wants to have an underfill Questions - Possibility for underfill 300balls BGA connector -
Electronics Forum | Mon Sep 08 02:39:37 EDT 2008 | akareti
By connector, you mean socket? Connector use for board to board connection from FCI, MFG P/N: 84500-202 What is the material of the connector(socket)? Is it very frigale? Housing: liquid crystal polymer Solder ball: SnPb 63/37 how big are the bal
Electronics Forum | Fri May 07 16:28:07 EDT 1999 | Andrew Wulff
On 1.27mm (0.050 inches) Standard Ball Grid Array's. The ball size diameter starts at approximately 0.025 inches. If the ball size decreases to 0.012 inches (due to the solder flowing down a via) is the solder connection reliable? This is a known L
Electronics Forum | Tue Aug 01 12:16:10 EDT 2006 | Vernon
Had a similar problem on a high speed drilling machine. It took 1 month before I found it. In the leadscrew ball nut, there was a guide tube which the balls circulate through. at the end of the tube is a shaped lip. This lip was damaged and the balls
Electronics Forum | Fri Sep 05 12:15:34 EDT 2008 | evtimov
All, Does anyone have experience with underfill > 300balls BGA connector? We have a component with > 300balls BGA connector that connectorize with > Flex. Customer wants to have an > underfill > > Questions - Possibility for > underfill 300ba
Electronics Forum | Fri Apr 29 14:00:40 EDT 2011 | ppcbs
Our company is finishing up a design prototype for an easy to use re-balling fixture. 100% ball attach, and you can re-ball more than one BGA at a time. Initial investment will be in fixture cost, but you will be able to re-ball several chips in ar
