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 | Tue Feb 03 12:24:56 EST 2004 | swagner
Paul, do you have any kind of false failure data for the application you struggled with? Also what amount of manpower did you use to operate the system(s).
Electronics Forum | Thu Apr 27 10:26:41 EDT 2000 | Ron Costa
Hello all! I am looking for an xray machine that can show me an open BGA solder joint. Does anybody have any experience with different type machines? I have used Nicolet model NXR 1400i.It's good at showing shorts but it cannot show me an open. Any
Electronics Forum | Fri Oct 30 12:48:59 EDT 2009 | dannou
I've been the AOI programmer for around 5 years now. The equipment I use is the Orbotech VT-9300 & VT-9500 systems. The programming isn't too difficult, mostly Grey-scale shadow measurement through application algorithms. Three levels of lighting an
Electronics Forum | Fri Jul 26 12:41:25 EDT 2013 | gallionc
We've had similar "disputes" with our quality department. A technical engineer from Nordson told me that the flourescents in the coating can look faint depending on the angle in which you look at the surface as well as how solder joints reflect the
Electronics Forum | Thu Apr 27 15:26:02 EDT 2000 | D Scott
Ron, I too use a Nicolet NXR 1400i. By using the rotation fixture and offsetting the board, a good BGA solder joint will appear elongated. If you rotate the board away from you the wetted joint will appear to lighten and become flat (looking at the
Electronics Forum | Tue Feb 03 12:39:20 EST 2004 | paul_bmc
We had the data at the time and it was quite high. More false calls then anything. I do not have the data anymore it since has been archived. When the system was introduced we had 1 engineer and 2 operators trained for programming and running the
Electronics Forum | Thu Oct 29 21:16:15 EDT 2009 | mah115
Fellows, We are considering getting an AOI machine to inspect boards that our vendors are giving us (we outsource the assembly of PCBAs). We have low volumes of boards, but every time a defect does slip by our human inspectors, it causes a lot of
Electronics Forum | Sat Dec 03 16:26:40 EST 2005 | grantp
Hi, I have seen demos of these scopes, and don't think they really show you very much. If you profile your board right, and drill up to solder a thermocouple onto the inner balls of the device so you really know your getting a good profile, I don't
Electronics Forum | Tue Feb 03 06:52:45 EST 2004 | paul_bmc
About 2 years ago our company tried to go with a post reflow AOI inspection. This AOI was suppose to be able to inspect to a level class 3 product. **It is impossible** You cannot inspect for a heel fillet and inspecting for poor wetting is a very
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