Electronics Forum | Wed Mar 27 19:26:53 EST 2002 | ianchan
After a whole night's self review, I think we can term the slant/tilt as "floating 0805, yet end-terminals have acceptable solder joint formation". the width portion of the 0805 RES/CAP is (floating)elevated from the PCB pad, yet both (width) termin
Electronics Forum | Wed Jun 26 00:49:52 EDT 2002 | ianchan
Steve, I'd second Daan's opinion. BGA profile we use gets a peak of 210deg-C to 223deg-C (but that's using our WS paste unique characteristics) with reflow zone holding time of 45-60sec. We had 6 PBGA and 2 ceramic BGA on a 6 layer PCB. typical p
Electronics Forum | Thu Aug 22 22:09:05 EDT 2002 | davef
Determine the number points (parts) on a pc board to be measured/connected in temperature profile according to the purpose of the profile. For instance: * A thread here on SMTnet recently discussed �copper plate� profiling. It is used primarily for
Electronics Forum | Mon Feb 10 09:49:32 EST 2003 | pjc
For manual X-ray systems: Kv power to start off with. Depending on what type of components you have to X-ray, you may be ok w/ just a 90Kv system, for example. Its not all about Kv though. With most systems you can adjust to quantity of X-rays you ar
Electronics Forum | Wed May 07 09:31:28 EDT 2003 | davef
We use uV Dymax glue for thermocouple attach sometimes, but don't like the remainder [anal] and loosing attach, sometimes. Roger Saunders, President Saunders Technology, Inc; said: PRO: � These products are easier to use than high temperature solde
Electronics Forum | Tue Jun 17 01:27:25 EDT 2003 | Dreamsniper
Hi Guys, I need your opinion here. Has anyone tried doing this Process: Bottomside Process first which means gluing the chip components then reflowing the Glue instead of Curing them, then Topside process which is solder paste printing then compone
Electronics Forum | Fri Jul 11 10:00:05 EDT 2003 | davef
Component manufacturers recommend limits on the power and period of ultrasonic cleaning. Examples are: * PRECAUTIONS AND GUIDELINES MULTILAYER CERAMIC CAPACITORS: (9) Ultrasonic cleaning time shall be ten minutes maximum. When the power of ultrasoni
Electronics Forum | Tue Apr 13 22:48:11 EDT 2004 | Ken
I assumed the balls were tin/silver 221C or tin/silver/copper 218C liquiduous....but, this is obviously not the case. It looks like you balls are almost pure tin (mp=238C) You are correct. This is exactly the same as using 10/90 high temp balls o
Electronics Forum | Tue Aug 24 23:04:14 EDT 2004 | pdeuel
If this code is on a ceramic cap then it is a 0.1uf cap. We have a conversion charts that list most all codes. Useing the last 2 digets only determine the value. The capatol letters A thru Z are given specfic numerical value. Example A0 is 1.0pf, A1
Electronics Forum | Thu Jan 27 15:13:26 EST 2005 | jbrower
Hi Tom, Thanks for the compliment. I've been researching and planning for the time that my company would go lead free since late in 1999. I hear you there, how do we know that the component is lead free. Baring a leap of faith with your vendors, I
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