Electronics Forum | Tue Jul 07 03:34:06 EDT 1998 | Martin Kelly
Hi just to let you know, in case you don't, but an x-ray machine is needed too check the solder balls, once they've been placed. See you later, | | I am very interesting of getting information about the criteria inspection of BGA. Example, what are
Electronics Forum | Sat Aug 29 09:12:39 EDT 1998 | Dave F
| Hi folks, | Lately I am also having problem with BGA ball problem. | We are finding more and more on X-ray analysis and is very expensive to replace. I know for sure that we could | rework on CCGA but there is no certified process in industry as w
Electronics Forum | Thu Aug 27 20:06:25 EDT 1998 | Kallol Chakraborty
Hi folks, Lately I am also having problem with BGA ball problem. We are finding more and more on X-ray analysis and is very expensive to replace. I know for sure that we could rework on CCGA but there is no certified process in industry as we speak
Electronics Forum | Thu Apr 27 21:20:38 EDT 2000 | Dean
Here are some pointers to use during your X-ray inspection. Microcracking is virtually impossible to determine with X-ray. However, I suspect you are looking for "hard" opens. Those are much easier to find visually. If using a paste-and-place pro
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 | 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
Electronics Forum | Fri Dec 02 02:35:51 EST 2005 | grantp
Hi, I have always wondered about these scopes and are they any good? They seem expensive when you consider you really only see the outside balls, and with small lead-less parts becoming more common, would the money be better spent on a good X-Ray?
Electronics Forum | Tue Dec 06 15:27:36 EST 2005 | Mike
Steve, You are correct in that X-Ray image of a BGA will not show flux residue. So what? If you are using no clean flux then I would think it doesn't matter if there is some flux residue. Sure if you are reworking a BGA and the operator dumps t
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 | Thu Sep 07 03:57:39 EDT 2000 | Steven Cheung
Does anyone know of a freely-available document which discusses the main considerations of BGA assembly and inspection (x-ray?). l need to know about pad sizes and inspection standards and when to underfill and when not to etc.. l am looking at ass
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