Electronics Forum | Thu Feb 23 23:35:29 EST 2006 | KEN
The principle issue with concrete is the charge dissipation as a function of water content.
Electronics Forum | Wed Apr 27 15:14:12 EDT 2005 | andymackie
The viscosity decrease on warming is one of the main reasons, but you also don't want to get moisture condensing on the surface of the paste. Activators in the paste (that are used to eliminate solderballs and enhance solderability on reflow) become
Electronics Forum | Fri Feb 24 14:10:16 EST 2006 | rsmith@z-mar.com
My company is an ESD firm. I have tested many different floors and sell ESD flooring and other products. With that said, here are my thoughts. Unsealed concrete is porous and tests in the 10 6th-8th range here in the southeast where we have decent hu
Electronics Forum | Tue May 07 03:56:30 EDT 2013 | pavel_murtishev
Davef, Thank you. I wonder if you have ever faced with concrete layer thickness selection for SMT shops? All I have found refers to metal treatment shops (primarily milling & drilling). 6" concrete is thick enough for them to stabilize milling machi
Electronics Forum | Tue Nov 19 15:18:28 EST 2002 | gswable
does anyone have concrete data on the reliability of lead free components-SN/Bi used with tin lead paste thanks
Electronics Forum | Wed May 04 12:14:18 EDT 2005 | rlackey
Hi Hoss, I was speculating - there are others out there with more experience in this field than me, who may know the definitive on this. I've heard rumours on transformers but nothing concrete. But I was guessing that the transformer (as a whole)
Electronics Forum | Fri Sep 02 10:27:49 EDT 2005 | Rob
One of our customers picked up an assembly, dropped it on a concrete floor, then kicked it down the corridor. Broke his toe on the steel enclosure, & suffice to say never tried it again. Nothing like decent, documented & controlled scientific testi
Electronics Forum | Fri Feb 24 08:49:55 EST 2006 | BGS
We have concrete floors. We check 28 locations every 90 days with a surface resitivity meter (calabrated) and Ive never seen a reading other than 10 to the 9th
Electronics Forum | Fri Feb 24 09:18:12 EST 2006 | russ
We also use tiles for two reasons. 1 yes they look a lot better. 2. Customers don't buy into concrete floors as ESD safe.
Electronics Forum | Wed Sep 05 08:56:42 EDT 2007 | stepheniii
One of our customers does a drop test. They hold the final unit five feet above a concrete floor and drop it.
