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    ESD技术

    Anti-static industry standard

    1 General specification for anti-static raised floor SJ/T 10796-2001

    2 General specification for anti-static veneer SJ/T 11236-2001

    3 Test methods for electrostatic properties of floor coverings and assembled floors SJ/T 11159-98

    4 Test methods for antistatic systems for electronic products manufacturing SJ/T 10694-96

    5 General rules for electrostatic protection of communication equipment YD/T 754-1995

    6 Communication room static protection general YD/T 754-95

    7 Anti-static technical requirements for the manufacture of electronic components SJ/T 10630-95

    8 Safety standard for fireproof performance of wooden raised floor DB 31/153-94

    9 Anti-static technical requirements for electronic equipment manufacturing SJ/T 10533-94

    10 Electronic computer room construction and acceptance specifications SJ/T 30003-93

    11 General Specifications for Anti-Static Operating Systems QJ 2846-96

    12 Information Technology Equipment Electrostatic Discharge Sensitivity Test SJ 20154-92

    13 Roof rubber waterproof material - EPDM sheet HG 2402-92

    14 Rules for the use of static sensitive devices Q/W 293-92

    15 Electrostatic requirements for electronic equipment and equipment QJ 2245-92

    16 Semiconductor device usage rules QJ 2225-92

    17 integrated circuit anti-static packaging tube SJ/T 10147-91

    18 Technical requirements for anti-static safety workbench QJ 2177-91

    19 Anti-static safety regulations for ammunition charging assembly production WJ 1913-90

    20 Anti-static safety regulations for the production of electric fire products WJ 1912-90

    21 Anti-static operating system technical requirements QJ 1950-90

    22 Electrostatic test method QJ 1875-90

    23 Anti-static requirements for electronic components QJ 1693-89

    24 Aerospace system grounding equipment grounding requirements QJ 1211-87

    25 Anti-static safety regulations for black powder production WJ 1695-87

    26 "Regulations on the Use of Electrostatic Sensitive Devices" material Q/W 293-92-2

    27 General specification for anti-static turnover containers SJ/T11277-2002

    Certification standards:

    1 International Standard IEC61340-5-1:2007

    2 US military standard ANSI/ESD S20.20-200


    ESD Three Models

    1. The human body type means that the friction between the body and the clothes generates a triboelectric charge when the human body moves. When people hold ESD-sensitive devices without first placing charge on the ground, the triboelectric charge will move to the ESD-sensitive device and cause damage.

    2. The charged type of microelectronics refers to both ESD-sensitive devices, especially for plastic parts. When automated production, triboelectric charges are generated, and these triboelectric charges are quickly discharged through a low-resistance line to a highly conductive, solid ground. The surface, thus causing damage; or causing damage to the metal portion of the ESD-sensitive device by induction.

    3. The field type is surrounded by a strong electric field, which may come from plastic materials or human clothes, where electron conversion occurs across the oxide layer. If the potential difference exceeds the dielectric constant of the oxide layer, an arc is generated on the side to destroy the oxide layer, and as a result, it is short-circuited.


    General technical requirements for ESD


    A, anti-static routine process requirements:

    1. The operator must wear a wired anti-static wrist;

    2. The table top involved in the operation of electrostatic sensitive devices shall be equipped with an anti-static mat;

    3. ESD sensitive devices must be transported by electrostatic shielding and anti-static devices;

    4. When preparing to open the seal and test the static sensitive device, it must be carried out on the anti-static workbench. Conditional ion air generator can be used to remove the charge in the air;

    5. The welding equipment and forming tooling equipment used for assembly must be grounded. The welding tool uses an internal heat soldering iron, the grounding should be good, and the grounding resistance should be small;

    6, the power supply system should be modified with a transformer for isolation, the ground wire should be reliable, to prevent floating ground wire, the grounding resistance is less than 10 ohms;

    7. When testing the product, the device cannot be plugged or unplugged when the power is turned on. It must be plugged and unplugged when the power is turned off. 8. ESD sensitive devices should not be taken out of the original package prematurely. According to the operation, try not to touch the legs of ESD sensitive devices;

    9. When soldering with wave solder, the solder and transfer system must be grounded;

    B. In the case of strict anti-static requirements, the following anti-static process requirements are also often required;

    1. When the ESD-sensitive whole machine is subjected to high and low temperature test or aging test, the electrostatic field test of the work site and the high and low temperature box must be carried out first, and the potential cannot exceed the safe value. Otherwise, the static elimination process should be performed.

    2. Anti-static measures should also be taken when the welded printed circuit board is to be treated as three. Do not use general brushing, ultrasonic cleaning or spray cleaning.

    3. Low-impedance instruments and equipment (such as signals, bridges, etc.) used during commissioning, measurement, and inspection should be connected to the input of the ESD-sensitive device after the ESD-sensitive device is connected to the power supply.

    4. In the production line of ESD sensitive test equipment, the electrostatic potential test should be strictly used to monitor the change of electrostatic potential, so as to take static elimination measures in time.


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