Weak current College】 【electronic equipment manufacturing anti-static technical requirements】.

<br> <br> 1 topic content and scope of application of this standard provides small electronic devices to develop and produce the whole process of electrostatic discharge damage protection technology requirements; procurement of electrostatic sensitive devices, testing, storage, transport, Assembly process, .anti-static action requirements, anti-static work of the management and staff education and training, etc. <br> This standard applies to electronic equipment development, production, maintenance and procurement of electronic components, storage, detection of static electricity protection. 2 .reference standards <br> <br> GB2887 <br> GB4385 <br> GB12014 <br> GBJ79 <br> GJB1649 computing station site technical requirements <br> Anti-static rubber-soled shoes, conductive rubber soled shoes safety requirements <br> .Anti-static overalls <br> Industrial enterprise communications grounding design specifications <br> Electronic products anti-static discharge control outline <br> 3 the term 3.1 electrostatic electrostatics <br> Surface excess or shortage of static charge. <br> 3.2 electrostaticdischarge electrostatic .discharge (ESD) <br> Static electric field of energy up to a certain extent, the breakdown of their introduction and the discharge of mass phenomenon <br> 3.3 electrostaticsusceptivity electrostatic sensitivity <br> Components can withstand electrostatic discharge voltage values. <br> .3.4 electrostatic sensor staticsensitivitydevice (SSD) <br> Against electrostatic discharge-sensitive carcinomas of the device. <br> Note I electrostatic sensitive devices sensitivity rating reference GJBl649 Appendix A. <br> 3.5 relief leakage <br> The electrostatic safety to the ground .. <br> 3.6 and neutralization <br> Use import of static charge to disappear. <br> 3.7 electrostaticconductor electrostatic conductor <br> People's Republic of China electronic industry 1994-08-08 approved 1994-12-01 implementation <br> SJ ./ T10533 - 94 <br> Surface resistance value at 105 ~ 10sfl range objects. <br> 3.8 g grounding ground Jiang <br> Electrical connections to be able to provide or receive a large number of charge objects (such as ground, ship .or vehicle metal shell, etc.). <br> 3.9 anti-static work area staticsafearea <br> By various anti-static facilities, devices and clear regional boundaries formed by the workplaces. <br> 4 basic requirements <br> 4.1. .basic principles of static electricity protection <br> A £ ® inhibits the accumulation of static charge; <br> B £ ® rapid, safe and effective in eliminating electrostatic charge has been generated. <br> 4, 2 anti-static work area venues .<br> 4.2.1 ground material <br> 4.2.1.1 prohibition of direct use of the wooden floor or laying of wool, hemp, chemical fiber rug and ordinary floor. <br> 4.2.1.2 should choose from electrostatic conductor material composition of .the ground, such as anti-static floor or in the General ground covered fortification electrostatic mats and effective grounding. <br> 4.2, 1.3 allowed by special processed terrazzo floor, such as the laying of the ground wire advance network, carburizing or in ground .spraying anti-static agent, etc. <br> 4.2.2 grounding <br> 4.2.2.1 anti-static system must have an independent and reliable grounding device, grounding resistance should normally be less than 10, laying and testing methods should be consistent .with the requirements of GBJ79. <br> 4.2.2.2 antistatic ground shall be connected to the power line zero shall be share with lightning ground wire. <br> 4.2. 2.3 uses three-phase power supply, 5-wire, its Earth line .can be used as anti-static grounding wire (but zero line, the ground shall not be mixed received). <br> 4.2.2.4 trunk sectional area received the landlord should be not less than 100mmz, branch of trunk sectional area should be not .less than 6mm2 equipment and bench grounded should adopt the cross-sectional area of not MMZ more unit packing plastic wire, grounding line color to yellow-green line suitable. <br> 4.2.2.5 connection method should be used for brazing. <br> .4.2.2.6 anti-static equipment connection terminals should ensure access reliable, easy Assembly and disassembly, allows the use of aluminum in various clamping connections, such as e-fish, plugs, etc. <br> 4.2.3 ceiling materials <br> .Ceiling materials should use anti-static material products, under normal circumstances to allow the use of gypsum board products, the prohibition of the use of ordinary plastic products. <br> 4.2.4 fabric walls <br> Fabric walls should use anti-static .wallpaper, under normal circumstances to allow the use of Lime plaster paint or paint the walls, the prohibition of the use <br> Ordinary wallpaper and plastic wallpaper. <br> 4.2.5 humidity control <br> 4.2.5.1 anti-static work .of the relative humidity below 50% suitable. <br> 4.2.5.2 in wrong product harmful effects, allows the use of humidification devices spray agents or water in order to increase the humidity. <br> 4.2.5.3 computer room humidity should be consistent .with the relevant provisions in GB2887, similar room should also comply with this requirement. <br> 4.2.6 regional boundaries <br> Anti-static work area should be marked regional boundaries, and hang the obvious warning signs, warning signs should be consistent .with the provisions of that workspace GJB1649 entrances should configure ionization air bath equipment. <br> 4.2.7 charge source <br> In anti-static work area, the prohibition of the use and contact easy to produce electrostatic charge source <br> 4.3 .anti-static facilities <br> 4.3.1 static security working table <br> 4.3.1.1 static security working table is anti-static work of the basic components, it consists of tables, anti-static mat, wrist strap connector and geodetic line ., etc. <br> 4.3.1.2 anti-static mat should be not less than two wristband connectors, one for the operator use, anotherFor technicians, inspectors or other officials. <br> 4.3.1.3 when necessary, static security table should be .equipped with ion wind-static elimination. <br> 4.3.1.4 electrostatic safety table does not allow stacking of plastic box (film), rubber, cardboard, glass, and so easy to produce static information of debris, drawings, etc. should be .antistatic satchel. <br> 4.3.2 anti-static wrist strap <br> Direct contact with the staff of electrostatic sensitive devices should wear anti-static wrist strap, wrist strap should have good contact with human skin, wrist strap must be on the .human body no stimulation, no allergic effects, wristband system-to-ground resistance value should be in the range of 106-108. inside? <br> 4.3.3 anti-static capacitor <br> In the development of electronic equipment, the .production process, all storage, container turnover SSD (components, transfer boxes, PCB racks, storage boxes, and other components) should have static electricity protection performance. does not allow the use of metal and plastic containers, if necessary, parts of turnover box .should be ground. <br> 4.3.4 wind-static elimination <br> Elimination of insulation material surface electrostatic charge should use ion wind-static elimination. <br> 4.3.5 anti-static overalls <br> 4.3.5.1 into anti .-static work area or contact with SSD. Personnel should wear anti-static overalls, anti-static overalls fabrics should be consistent with GBl2014 provisions. <br> 4.3.5.2 in relative humidity greater than 50%, anti-static overalls allow selection of .cotton products. <br> 4.3.6 anti-static work shoes <br> Enter the anti-static work area or contact with SSD personnel should wear anti-static work shoes, anti-static work shoes shall conform to GB: 4385 <br .> The relevant provisions of the PCT in general allow wear ordinary shoes, but you should also use conductive shoes beam or heel belt. <br> 4.3.7 anti-static transporter <br> Transshipment of SSD or SSD, components should be used with .anti-static properties of truck! <br>.