Electronics Forum | Thu Feb 10 10:49:26 EST 2000 | Sal
The connectors are well within thier specification,and are also checked for misaligned and damaged pins , as regards the cross-section results, all holes are correctly aligned and are well spaced within their tolerance of +/-0.005 (a couple of isolat
Electronics Forum | Tue Oct 24 19:40:40 EDT 2000 | Dave F
From the SMTnet Library Terms & Definitions [er whatever they call it] � Emulsion. A material that suppliers build-up on a printing screen to block portions of the screen. The un-blocked (open) portion of the screen define the pattern for depositi
Electronics Forum | Tue May 16 16:32:38 EDT 2000 | Ashok Dhawan
1) I had downloaded ANSI/ESD-S20.20-1999 from www.eosesd.org web site. I am not clear whether section 6.2.3.2 is correct. It states that " All process essential insulators that have electrostatic fields that exceed 2000 volts should be kept at a mi
Electronics Forum | Mon Mar 13 14:41:22 EST 2000 | Boca
By Hot Air Knife I assume (leave it alone Dave F.) that you mean a debridging knife located at the exit end of a wave solder machine. Russ is right, they are not a good substitute for a good process, but once the process (w/o HAK) is developed, it
Electronics Forum | Mon Mar 13 14:45:01 EST 2000 | Boca
By Hot Air Knife I assume (leave it alone Dave F.) that you mean a debridging knife located at the exit end of a wave solder machine. Russ is right, they are not a good substitute for a good process, but once the process (w/o HAK) is developed, it
Electronics Forum | Tue Feb 20 14:00:50 EST 2001 | billschreiber
Hi Dave, It sounds like you haven�t been shopping for stencil cleaners in awhile. Ultrasonic stencil cleaners start at $12,900, evaporators start at $6,800 and 440-R SMT Detergent is $19.00 per gallon. For $19,719.00 you get everything you need to
Electronics Forum | Tue Feb 27 07:51:59 EST 2001 | jackofalltrades
We use Selective Wave Pallets for the vast majority of our boards with great success. Many of our boards have BGA's and connectors on both sides, which for the most part then require the Selective Wave Pallet. We successfully use pallets up to 10mm t
Electronics Forum | Sun Mar 18 20:48:23 EST 2001 | Doug Leaser
I�m doing some research in the field of routing, or cutting, PCB�s using a non-conventional method as compared to conventional routing machines. I need some accurate feedrates for routing certain PCB materials, as listed below, to compare data. Unf
Electronics Forum | Mon Jun 18 21:20:17 EDT 2001 | davef
It�s sometimes tough to put enough paste on the board before reflow to obtain half-way adequate hole fill with components on a 0.062 inch thick board. So, a 0.093 incher, um. Yano, a lot is determined by board lay-out and how you jigger your profil
Electronics Forum | Fri Jun 29 23:10:02 EDT 2001 | Danial
Thanx for the reply guys!! The problem happened on only one PBGA, the balls are eutectic and the paste volume height is at 5.96 mil min. The stencil opening has been increased to 30 mil which initially was 20 mil. You guys are right!! One probable
