Electronics Forum | Wed Mar 14 17:11:57 EST 2001 | davef
First, x-ray inspection machines have a wide range of capilities. Resolution is a key measure of a machine's ability to "distinguish" features. People say that some x-ray inspection machines have the ability to position the board being inspected at
Electronics Forum | Mon Jun 18 11:06:31 EDT 2001 | Gil Zweig
In-line systems are effective in detecting the obvious defects such as solder bridges, missing balls and excessive solder voids. They may not be as effective in detecting the subtle changes in solder bond shapes (signatures) indicating loss or chang
Electronics Forum | Wed Aug 07 17:25:16 EDT 2002 | gzweig
Glenbrook Technologies has a publication in pdf format that addresses just those issues. You can get one, at no cost, by e-mailing gzweig@glenbrooktech.com and request "BGA Signature" publication.
Electronics Forum | Wed Aug 04 09:49:58 EDT 2004 | davef
We know of no such service provider in Malaysia. Consider contacting major xray equipment suppliers [eg, Glenbrook. V.J. ElectroniX, Agilent, Teradyne, etc] to determine: * Service suppliers in your region. * Terms that they offer in providing xray
Electronics Forum | Wed Aug 04 12:02:05 EDT 2004 | FSilva
Try reaching the following company in your region: Uniwes Technology (S) Pte Ltd 102E Pasir Panjang Road #03-01/02 Citilink Warehouse Complex. Singapore 118529. Tel: (65) 6275 8183 Fax: (65) 6275 8182
Electronics Forum | Mon Apr 05 17:47:21 EDT 2010 | boardhouse
Hi Deni, X-ray will not be able to see through Power and Grn planes. Your only way to find out is: 1) ask your board supplier to supply stack up used. 2) surface grind layer by layer to validate if it is correct stack up. What is making you think
Electronics Forum | Thu Apr 15 10:44:28 EDT 2010 | dwonch
Dumb question maybe but does the board have a layer count window? Usually each layer has it's number visible in copper somewhere on the board and the shop will leave the solder mask clear of this window. If the layers were stacked incorrectly it woul
Electronics Forum | Thu Apr 08 02:04:53 EDT 2010 | dilogic
Having no real experience with x-ray inspection, this answer helped a lot. What I actually want is to check top 3 layers and it should be pretty straightforward, as the second layer from the top should be almost empty and the third one should be a gr
Electronics Forum | Wed Mar 14 14:03:19 EST 2001 | mzaboogie
Hello, I have been told to look for open BGA connections, the open ball would appear larger than the others due to the fact that it has not columnized. I have also been told that it will look smaller due to the fact that it has not collapsed. Could
Electronics Forum | Wed Mar 14 16:30:02 EST 2001 | CAL
Reading x-rays is an art. All balls should be symmetrical in size and shape. Please provide more information on your question. Why just opens? If the Balls are not consistently the same in size or shape there is a problem. Larger balls could be from
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