Static Protection

by:Sure     2021-08-16
1. Grounding is to directly discharge static electricity through a wire connection to the ground. This is the most direct and effective anti-static measure. For conductors, grounding methods are usually used, such as artificial anti-static wrist straps and work surface grounding. Wait. Grounding is implemented by the following methods: a. The human body is grounded through a wrist strap. b. The human body is grounded through anti-static shoes (or shoelaces) and anti-static floor 1. Grounding is to directly discharge static electricity through a line of connection to the ground. This is the most direct and effective anti-static measure. It is usually for conductors. Use grounding methods, such as artificially wearing an anti-static wrist strap and grounding the work surface. The grounding is implemented by the following methods: a. The human body is grounded through the wrist strap. b. The human body is grounded through anti-static shoes (or shoe laces) and anti-static floor. c. The work surface is grounded. d. The test instrument, tool holder, and soldering iron are grounded. e. Anti-static floor, grounding mat. f. Anti-static transfer vehicles, boxes and racks should be grounded as much as possible. g. The anti-static chair is grounded. 2. Electrostatic shielding Electrostatic sensitive components will be exposed to static electricity during storage or transportation. The method of electrostatic shielding can weaken the influence of external static electricity on electronic components. The most common method is to use electrostatic shielding bags and anti-static turnover. Box as protection. In addition, the anti-static clothing has a certain shielding effect on the clothes of the human body. 3. Ion neutralization insulators are often prone to static electricity. To eliminate static electricity in insulators, grounding is ineffective. The usual method is ion neutralization (partially shielded), that is, ion fans are used in the working environment. An equipotential working area. Therefore, in anti-static materials and anti-static facilities, products derived from these three methods can be divided into anti-static meters, grounding system anti-static products, shielding anti-static packaging, transportation and storage of anti-static materials, Neutralizing static elimination equipment, and other anti-static supplies. A. Anti-static instrument 1. Wrist strap/foot strap/anti-static shoe comprehensive detector-purpose: used to detect whether the wrist strap, foot strap, and anti-static shoes meet the requirements. 2. When testing foot straps and anti-static shoes, a metal plate and a wire connected to the meter should be added. 3. In addition to static ion fan detector-purpose: regularly check and verify the balance and decay time of the ion fan to ensure that the ion fan is working in a safe range of indicators. 4. Electrostatic field detector-purpose: measure the electrostatic field to reflect the existence of static electricity, and read in the form of voltage to test the electrostatic strength of the environment. Generally affected by the environment and the transient characteristics of static electricity, it is difficult to truly reflect the actual situation. 5. Electrostatic shielding bag tester-purpose: used to test the shielding effect of electrostatic shielding bag. 6. Surface resistance measuring instrument-purpose: used to measure the surface resistance and volume resistance of materials. B. Grounding anti-static products 1. Anti-static wrist strap: It is widely used in various operating positions. There are many types of wrist straps. It is recommended to generally use a wrist strap with a resistance of 1 megaohm, and there should be a certain amount of wire length. 2. Anti-static watch: It needs other anti-static measures to remedy (such as adding an ion fan, wearing an anti-static heel strap, etc.) in order to achieve better anti-static effects. It is recommended not to use anti-static watches in large numbers. 3. Anti-static foot strap/anti-static shoes: After using the anti-static floor in the workshop, you should wear anti-static shoelaces or anti-static shoes. It is recommended that the workshop should wear anti-static shoes as the main, which can reduce the introduction of dust. Operators and employees will be better equipped with anti-static wrist straps. 4. Anti-static table mat: It is used for laying on the surface of each worktable, and each table is connected with an anti-static ground after a 1 MΩ resistor is connected in series. 5. Anti-static floor: Anti-static floor is divided into: PVC floor, polyurethane floor, raised floor. Anti-static wax and anti-static paint: Anti-static wax can be used on various floor surfaces to increase anti-static function and make the floor brighter and cleaner. Anti-static paint can be used on various floor surfaces, and can also be applied to various shelves, turnover boxes and other containers . C. Shielding anti-static packaging, transportation and storage materials 1. Anti-static turnover box, anti-static component box: used for the turnover, transportation and storage of veneers and parts in the workshop. 2. Anti-static shielding bag: used for packaging, transportation and storage of veneers and components, with a certain degree of moisture-proof effect. 3. Anti-static tape: used for various packaging boxes, etc. 4. Anti-static IC strips and IC trays: used for storage and handling of IC components in the production workshop. It is forbidden to store IC in the open before use; or unpack and transport. 5. Anti-static racks, trolleys and workbenches: Anti-static racks and trolleys are widely used in the turnover and handling of veneers and components in electronic assembly workshops. Anti-static racks and workbenches should be connected in an anti-static manner, and the anti-static mat on the trolley should have a metal chain in contact with anti-static ground. 6. Anti-static work clothes and work shoes: processing with static sensitive components and certain cleanliness requirements In workshops, employees should generally be strictly required to wear anti-static work clothes and shoes. 7. Anti-static finger cots: If the operating station employees often need to hold workpieces or static-sensitive components in their hands, it is necessary to wear anti-static finger cots. D. Neutralization equipment ion fan, air gun
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