Electronics Forum: bottom (Page 221 of 232)

Re: PCB panellisation

Electronics Forum | Wed Apr 08 00:49:37 EDT 1998 | Steve Gregory

Well...I think we just about beat this one to death, but I'll go ahead and add a couple more points to "pro-score" camp...WITH the caveat that it HAS to be done right! Yes, I will say that I've had to deal with the wrong spec'd or crappy scor

Re: Flux splattering during reflow

Electronics Forum | Mon Jan 19 20:01:11 EST 1998 | Steve Gregory

| We use no clean paste and sometimes experience | flux splattering which gives spot on gold fingers. | Need help in analize the cause. thx. Dominic, That is STILL a problem huh? It's a tough one to solve sometimes...especially when you have as

Placement Program Control

Electronics Forum | Fri Aug 17 14:28:27 EDT 2001 | Chuck N.

I like the idea that files are stored on a Lan system. Typically lans are backed up daily or weekly by the IT department. If not they should be backed up on tape or disk weekly, monthly, etc. depending on how often new programs are released. The m

Solder paste normalisation period

Electronics Forum | Fri Aug 17 06:40:27 EDT 2001 | nifhail

Thanx Dave/Hussman.. We normally store our solder paste in the refrigerator at 0-10 Deg C as per what the supplier recommanded. Our floor temperature is controlled at 22 +/- 5 Deg C and Humidity is at 55 +/- 5%. Recently we have customer asking fo

Any comments for Quality @ AQL=0.1, C=0 ???

Electronics Forum | Mon Mar 25 15:51:04 EST 2002 | davef

ASQC re-numbered the once free (taxpayer sponsored development) MIL-STD-105 as ASQ-Z1.4, slapped their own cover on it, and now charge $40 or $50 for the same document! The standards are identical, so see if you can get one of the old �MIL-STD's� and

adhesive on pads

Electronics Forum | Mon Apr 01 20:10:24 EST 2002 | davef

Oh. [Howabout if I smack you?] If ahma connectin� wif whut yer sayin�, you: * Don�t like the appearance of the glue slobberin� out from under the component even though there is no apparent glue on solderable surfaces. * Concerned about the hydrosco

IONIC CLEANLINESS SPEC FOR BARE PWBs

Electronics Forum | Sun May 09 16:25:00 EDT 2004 | gabriele

Military and most commercial standards requires > post-soldered boards to measure less than 10 > �g/in of NaCl (14 when using an Omegameter, 20 > on a Ionagraph, and 37 on a Zero-Ion). > > As Dave > stated, 6.5 �g/in of NaCl is called out in >

BGA Rework

Electronics Forum | Thu Apr 10 09:28:14 EDT 2003 | chrissieneale

Thanks for your replies guys, there's some good info there. Dave, answers to your questions: The stencil was initially a big problem as with the Egineering Model's (EM's) and Engineering Qualifing model (EQM's) we kept getting short circuits due to

NPI Qualification Checklist

Electronics Forum | Mon Apr 21 13:48:32 EDT 2003 | davef

ISO 9001-1994 and ISO 9001-2000 are significantly different regarding 'process'. In the 1994 version, processes were considered to be routine manufacturing processes [eg, drill a hole]. In the new ISO, a 'process' is more global and covers anything

SMT EQUIPMENT FOR LOW VOLUME HIGH MIX

Electronics Forum | Fri May 09 00:59:36 EDT 2003 | kenBliss

Hi HERMAN I did not see any financial opinions so I thought I would offer one. The goal of the company is to make money, how you achieve that has many variables. Buying new equipment when the existing will do the job costs big money, provided the


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