Electronics Forum | Wed Mar 30 15:15:03 EST 2005 | chunks
This is a pet peeve of mine. The paste height requirement is generally asked because the customer has no clue about screen printing, but knows to ask this question. If he did know even a little about printing, he�d ask you to assure the �volume� of
Electronics Forum | Thu Jul 12 17:43:50 EDT 2001 | Steve
In order to understand your printing process, you cannot rely soley on 2D inspection. By implementing 3D-true volumetric measurement, a more comprehensive approach to correcting the process variation can be established. True volumetric / 3D inspect
Electronics Forum | Mon Nov 12 09:22:41 EST 2007 | devajj
BTW, The surrounded QFN fine pitch terminals > should have the normal aperture reduction of 7 % > in case of RoHS Senju solder paste. This works > for our Telecom customer. > > The vias in the > ground pad will be somewhat filled with solder >
Electronics Forum | Fri Dec 28 15:37:06 EST 2007 | realchunks
OUCH! The ol' boss went to a seminar clich� eh? That�s a killer. Especially if it�s salesperson driven (which most are). Almost as bad as when they pick up Circuits Assembly or Assembly Magazine. OK so you�re stuck doing this process. I would
Electronics Forum | Fri Apr 20 08:41:56 EDT 2001 | jimlew
For those of you out there, like myself who are still using 2-d to measure paste ht, I have 2 questions. 1. Typically, what tolerance are you applying to your ht? +- 1 mil, or what? 2. Are you using metal squeegees, and if so, have you found that squ
Electronics Forum | Mon Apr 16 10:55:01 EDT 2001 | genny
Happened at my company lots on our older designs. We touched up those pads in house by hand, because the solder joint was very poor. We also did it on SOT 86 pkgs on the gnd pins. When they were touched up, we would get an extra 1/2dB of gain out
Electronics Forum | Mon Apr 12 22:49:09 EDT 2004 | Ken
I will assume the balls of the device are tin-silver or tin-silver-copper??? There is no reason why you can not run 63-37 solder paste on this device. You will form an intermetallic at the interface structure, however, you will NOT form the 2/3 col
Electronics Forum | Fri Dec 28 14:31:42 EST 2007 | clampron
RC, I agree. I have tried to educate management as to the real benifits of height measurement. Our President attended a CEO meeting of some sort and was told that solder paste height measurement will solve all of the worlds problems. She then inquir
Electronics Forum | Tue Jul 09 15:20:19 EDT 2002 | pjc
When you look at the capabilities of Combo machines they tend to sacrifice performance when compared to separate X-ray and AOI machines, meaning they don't do either the X-ray or AOI operations as well as a machine that was designed to do only one. A
Electronics Forum | Thu Oct 18 08:27:46 EDT 2018 | spoiltforchoice
They visited our factory once bringing the desktop variant with them quite a while ago (~8 years perhaps when they were still called something else). At the time it was an FAI machine first and foremost with some "AOI like" features that perhaps o
