Electronics Forum | Thu Aug 05 18:21:16 EDT 2004 | davef
Well, it could be the beautiful Jill Masterson, as Goldfinger's trusted card advisor Shirley Eaton, who gave new meaning to the phrase "golden girl." Or more mundanely, gold thickness usually ends-up: * Gold fingers (10 to 100 micro-inches) * Selec
Electronics Forum | Mon Nov 20 19:49:03 EST 2006 | davef
Sorry for stating this incorrectly. It should been: Bow & twist for bare boards and panels: IPC-A-610 Acceptability of Electronic Assemblies, 10.6: 1.5% for PTH only and 0.75% for SMT, acording to test method TM-650, method 2.4.22 IPC-6012, par. 3.
Electronics Forum | Wed Mar 28 11:29:49 EST 2001 | gcs
I've used below: WEIGTH OF COMPONENT IN GRAMS ---------------------------- TOTAL PAD MATING AREA IN SQUARE INCHES GRAMS PER SQUARE INCH MUST BE EQUAL/GREATER THAN 30 FOR SECONDARY MOUNTING.
Electronics Forum | Thu Sep 16 16:16:47 EDT 1999 | Earl Moon
| I am not familiar with the "mil" metric. How many inches is in 1 mil? | | ...or 10 mil? | | each mil = .001" Earl Moon
Electronics Forum | Fri Sep 17 15:51:07 EDT 1999 | JohnW
| | | I am not familiar with the "mil" metric. How many inches is in 1 mil? | | | | | | ...or 10 mil? | | | | | | | | 1 mil= .001 inches | | 10 mil= .010 inches | | Also, it has nothing to do with metric. | | | I was also confused with this sta
Electronics Forum | Wed Dec 19 07:45:01 EST 2001 | nicholt
We are using a age old warpage spec of .010 inch per inch max warpage spec. Is there a recommended warpage spec for surface mount boards?
Electronics Forum | Mon May 05 09:53:13 EDT 2003 | k_h
Stencil thickness = 175 microns? If my math is correct, 175u=0.175mil, and if that is english units then it is inches. I'm not understanding this correctly, please clarify for my sake please, are you saying the stencil thickness is 0.000175 inches th
Electronics Forum | Tue May 25 17:24:00 EDT 2004 | davef
We get confused when using the term "mil". Is this "mil" ment to be: * One thousandth of an inch? * A millimeter? If it's to be "one thousandth of an inch", we prefer the decidely UK notation "thou".
Electronics Forum | Mon Jan 31 08:30:41 EST 2005 | davef
Yes, probing via is perfectly acceptable. Via: * Pad diameter is 0.028 inch * Via pitch minimum is 0.50 inch ... all of which is fairly common, even when probing test pads. [Your English is fine, at least as good a half the English speakers here.]
Electronics Forum | Fri Apr 08 04:48:34 EDT 2005 | vinitverma
7mils/inch is 0.7% and the IPC-A-610 calls for 0.75% (for SMT), so both are approx. the same. So there are no two methods in what you described. The 7mil/inch is also a percentage. Regards Vinit
