Entries by wootc

Hand Tools, Equipment, and Fixtures

Only ESDP hand tools should be used in the EPA. Manufacturer recommendations for usage and cleaning shall be followed. Component holding trays, microscopes, and other devices or fixtures commonly found in an EPA shall be constructed of metal or permanent static dissipative plastic and shall be maintained at ground potential by placing them on a […]

Relative Humidity Control & Air Ionizers

Relative Humidity Control Humidity control is important for an effective ESD program for two primary reasons; At lower humidity levels (< 30% RH), the dissipation of commonly generated static charges does not take place, thus adding to the probability of ESD events. Materials (such as pink poly) rely on the moisture in the air to […]

Equipment and Facilities Grounding

All permanent and semi-permanent metallic structures and test equipment utilized during handling or manufacturing of ESDS components or hardware shall be grounded using a common point ground. A major goal of this document is to ensure that all conductive materials are tied together at the same potential. An equal potential workstation is the secret to […]

Personnel Grounding Devices

Personnel grounding devices are the primary means of ESD control. For static charges generated during ordinary body movements, personnel-grounding devices provide a permanent path to ground. Such devices may take various forms such as: Wrist Straps Leg Straps Heel Straps Conductive Shoes Wrist Straps Wrist straps are considered to be the first line of defense […]

ESD Protective Floor Mats and Conductive Floors

Conductive floors or grounded conductive floor mats are mandatory in any EPA where personnel handling ESDS items are not wearing wrist straps. Under these circumstances, personnel shall use leg straps, heel straps, or conductive shoes. ESDP flooring or floor mats shall be used in all Class 1 facilities. The proper cleaning and maintenance of a […]

ESD Protective Work Surfaces

The ESDP work surface (Reference ESD TR20.20-2008, section 5.3.1 – Work surfaces) will provide a safe path to ground for static charges within the operator’s general working area. Either the ESDP work surface may be fabricated as a part of the workbench or it may be a separate addon item. In either case, the ESDP […]

Three most commonly used antistatic methods for fabrics

 Dispersion Leakage Elimination Electrostatic Method For synthetic fiber fabrics, the conductivity of the fabrics can be increased by reducing the resistance. The main method of reducing resistance is to use surfactants to hydrophilicize the fibers or fabrics, so as to improve the hygroscopicity of the fibers, thereby reducing the resistance of textiles, speeding up the […]

Cleanroom Performance Testing and Reference to Relevant Certification Standard

Cleanroom testing is a very necessary process before the cleanroom is used by the owner after construction. Whether the cleanroom testing meets the standards will directly lead to whether the cleanroom meets the production requirements. According to the standard of IES-RP-CC006.2 cleanroom test, the working state of cleanroom may fall into three states: empty, static and […]

Footwear/Flooring System Walking Test Demonstration

1.This presentation addresses the walking test as described in ANSI/ESD STM 97.2. The use of this test method is required by any ESD control program claiming compliance to ANSI/ESD S20.20 when an ESD floor or ESD floor mat is used as primary ground for personnel. In these situations, the walking test must be performed during […]

ESD Fundamentals Part 6: ESD Standards

Download as a PDF » The electronics industry is continually shifting. Device density and technology is more complex. Electronics manufacturing is more heavily reliant on out-sourcing. The ESD industry seems to have jumped into this swirling eddy headfirst. ESD control programs have mushroomed. Black has been replaced by green, blue and gold. Shielding bags dominate […]