Q: May I know the standard test procedures and parameters (ie: surface resistivity/surface to or person to ground resistance, decay time or any other parameter if applicable) and recommended values for confirming the worthiness of the following ESD items?
- ALL ESD PACKAGING ITEM
- ESD FLOOR AND WORK SURFACES
- ESD CLOTHINGS
- ESD FOOT WEARS
- ESD HANDLING ITEM viz., BRUSHES / BINS / PCB RACKS
A: Please consult your copy of ANSI/ESD S20.20-1999 from the ESDA at http://www.esda.org/. It has specific documents for different technical elements. For example, S1.1 for wrist straps, 2.1 for garments, 3.2 for ionization, 4.1 for worksurfaces-resistive characterization, 4.2 for worksurfaces- charge dissipation, 5.1 for Human Body Model, 5.2 for Machine Model, 5.3 for Charged Device Model, 6.1 for grounding, 7.1 for resistive characterization of materials-flooring materials, 8.1 for symbols-ESD awareness, 9.1 for footwear-resistive characterization, 10.1 automated handling, s11.11 surface resistance of static dissipative planar materials, 11.12 for EDS items-volume resistance of…, 11.2 for Triboelectric charge accumulation testing, 11.31 for bags, 12.1 for seating, 13.1 for electrical potential from soldering/desoldering hand tools, STM 97.1 for floor materials and footwear-resistance measurement in combination with a person, and STM 97.2 for floor materials and footwear-voltage measurement on a person just to name a few.
I could spend a lot of time digging up actual values for these specific items that we provide, but I haven’t put anything like that together all in one place. I will work on that and perhaps we can post that info all in one place. But keep in mind. We do not determine the parameters, we merely work to comply with them.