Electronics Forum | Sat Mar 09 07:09:44 EST 2002 | davef
Interesting findings. I agree that probably no one does �100% volume measurement and subgrouped Xbar and S charts�. Who would want to spend the money? Isn�t the issue making things, rather than measuring things? The microscope is used to make m
Electronics Forum | Wed May 29 17:17:49 EDT 2002 | wilcoxito
As far as aperture dimensions go, I found a technical note written by Micron that recommends using "square apertures with sides equal in length to the diameter of the PCB pad. The corners of the square should also be slightly rounded, and the apertu
Electronics Forum | Wed Jun 12 06:19:13 EDT 2002 | seje
Hi Ian. I really didn't mean to under rate salesmans, just have some opinions from users too. I'll give my respect to the salesmans, but still I'd like to have some other hand data too, and most preferably from person who works with those mahcines (
Electronics Forum | Wed Jun 12 11:14:57 EDT 2002 | pjc
Sam, Like I said, AOI for pre-reflow inspections is the easiest to program and maintain. Each vendor of AOI has its pluses and minuses for programming and performance. Do a careful investigation of each vendor to learn about their machine performanc
Electronics Forum | Sat Jun 15 22:39:05 EDT 2002 | edahi
well we can't paste the flip chip on its substrate because we are using flux...because this bare die yet...and the surface of the die flipped might be contaminated...also after chip attach and reflow the die is to be underfilled and if the die is pas
Electronics Forum | Tue Jul 09 10:15:17 EDT 2002 | msjohnston
Cal, Our parent company is a FAB and they are about to release a new generation of parts. Usually the die is qualified in a simple TSOP form factor. This time the first product quals will take place in the BGA and CSP from factors rather than the t
Electronics Forum | Sun Feb 15 17:12:15 EST 2004 | brian bennett
as george says move beam back towards the centre of the machine make sure it is square although not neccesarily on the alignment arrows. make sure alignment laser is clean along with the recieving mirror on the head.also make sure the driver filters
Electronics Forum | Mon Dec 15 22:05:02 EST 2003 | Sam
hi Liang, We had the same problem like you before, it happened during starts up the machine (S13) and run the production for the first or second board. We also replaced the 2/2-way microvalve of placement circuit. The problem had solved at the begini
Electronics Forum | Mon Feb 02 14:30:32 EST 2004 | kauer
Could be an intermitant card, or encoder issue. Sounds like the machine is giving this error because it is loosing track of one of the axis and instead of trying to move something and possibly crash, it locks up in error mode. Could be something as s
Electronics Forum | Wed Apr 07 11:36:41 EDT 2004 | stefwitt
Your machine will have to have a reference position. From this reference position, you determine all other machine positions. If the camera is attached to the head, you could place a glass slug and measure camera-nozzle offset, by placing the slug w
