Electronics Forum | Sun Feb 15 18:07:18 EST 1998 | Scott McKee
| I am beginer in BGA assembly and am confused in selection of pick and place option. As per book on 'implementation of BGA Technology-by 1995 aeic inc. states that BGAs reflow is quite forgiving and you need only Mechanical centering of PBGAs. The I
Electronics Forum | Wed Dec 04 21:39:53 EST 2002 | davef
As you say, some BIG time force has pulled the metalization from the bottom of the component termination. From the pix it's hard to say whether it was caused by either: * Mechanical flexure of the board during an unusual heating or other processing
Electronics Forum | Sat Sep 25 08:59:59 EDT 2004 | davef
IPC-HDBK-830, Guidelines for Design, Selection and Application of Conformal Coatings says: A conformal coating may have several functions depending on the type of application. The most common are: * Inhibit current leakage and short circuit due to h
Electronics Forum | Wed Mar 30 16:46:03 EST 2005 | chunks
There is no spec because solder is designed to provide an electrical connection not a mechanical connection to hold the part on. If it where mechanical we�d be welding our parts on. Your pad width and length are derived from your component manufact
Electronics Forum | Tue Sep 12 01:54:57 EDT 2006 | AR
I assume that you are referring to the same kind of mechanical feeders (older type) that are used on the Philips (Assembl�on) Topaz as well. First make sure that the right gear pulley spring is set to its stiffest position (the loop at the end of the
Electronics Forum | Fri May 04 19:23:28 EDT 2007 | darby
System > Machine Config > Mechanical OP > Head 3 Spec = Vision. Data In > System > Machine Config > Mechanical OP > M Centering 1 = Yes If your Centering unit is a two stage unit then also set M Centering 2 = Yes You should then be able to roughly
Electronics Forum | Wed Nov 26 07:45:24 EST 2008 | davef
Investigation of Device Damage Due to Electrical Testing, R Croughwell & J McNeill, Worcester Polytechnic Institute Abstract: This paper examines the potential failure mechanisms that can damage modern low voltage CMOS devices and their relationship
Electronics Forum | Wed Jun 17 16:02:09 EDT 2009 | mhunter
Any thoughts on this will be appreciated, thanks in advance for reviewing. This assembly has been processed in our facility by going through a press operation (~ 1731 lbs), then into wave solder. Note the discoloration around the pemnut. The discol
Electronics Forum | Thu Sep 02 16:52:31 EDT 1999 | Earl Moon
| | | Has anyone done or seen any studies done documenting what may be the affect of hardware such as screws in the parimeter vicinity of BGAs on a circuit board? | | | | | | What I'm really after is anything describing how close a screw/washer/nut
Electronics Forum | Tue May 29 16:53:20 EDT 2001 | pcmarch
The most current Amistar models prior to Tenyru being sold were the 7100 series. This is very similar to the current I-Pulse equipment. Before that, there was the 5800 (4 heads all vision) 5720Z (3 mechanical heads, 1 vision to 20mil) and the 5630
