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标题: ???·°?????????????°?×°????ESD?è?????ò[×???] [打印本页]

作者: wards    时间: 2004-2-9 11:15     标题: ???·°?????????????°?×°????ESD?è?????ò[×???]

   ???·°?????????????°?×°????ESD?è?????ò[×???]

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????????×??ú?·?è????±???×???????????·????è?????ò??±????é????????·?(ESD)?ú?ú?????í?????°?ú??????±????????????????è???????à?è?????ò???ü?????ú???¤·?????????????·??ú?ú???????????????ú??×??è±??è???¤???????????????§?°??

?????í?à?ú?·?è???¤?????¨?????ú?·???????ú?ú?·???±??×???????????????·?(ESD)??????????????×??è±??????¨??????????·??????????????á??°à???????°???????????è????????·?°?????????×?????·?°??¨??????????°??ó?????÷?????????????ì?????????????¤×°?????????è???????è?????ò?????ú?·????????±??????°?ì??

?????????????é·á?????¤???????è???¤?????????????????????è????????????·?????????ESD???ó?à????×??è±????ú?ü????99%???±???????????????úESD???·????????ESD??????×??????????????????è±?×??í????????×??è±??ê??????ESD????±?????????????ESD???????????????ü?á?????è±????????????????????§?????????????á????????????????????????????×??è±????????????????ó???????????±???????????????ù??±??°?ì???§????×??è±??°?????ì??????????

????ESD?ú?ú???ú?í

??????·???ESD???×??±???????ESD?????????°ESD??????×??è±??????????????????????????ü?í?????????±??????????·??úESD???×?????????????????á?¨???????????????????ú?ú?????????????÷???????????????????????????ü?????????????????é?????÷???????±?????á?ú?ú????????0.7ns??10ns???±?????????????÷?á????????°??à?????±?????á????100°??à???????????±?????±?????????????????·?ò?????÷??????????????????????

????ESD???ú?ú????????????????????????×è???????????ú??????

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????ESD?????¨????????????????????×??è±???

??????????????????????±í???????ó????????????????ESD????100mm???ú?ú????4000V/m????????

????×?????????/???÷?????ú?ú??????????????????
a. ???????÷??????±???????????????MOSFET??CMOS???÷?????¤??(????)??
b. CMOS?÷????????·??÷????(????)??
c. ???··?????PN?á(????)??
d. ???·???ò??????PN?á(????)??
e. ?????????÷???????????????ò????(????)??


???????÷?á???????????ú?ú????????(V=L??dI/dt)?????????????????????????ò?????????????????????????????????????à?????????????÷??(????)??

?????????á?ú?ú????????·??§??1MHz??500MHz?????????????????????????ü?????????????·?·??????ESD????100mm??????·??ú?ú????15A/m?????÷??

????????·????????????á???????¤???????????????????????????????ì????×÷??(????)?? ESD?á?¨???÷???÷?ù???????????????è±???±???????ESD????·??§?í???????????????????????????ü???????????????????·????????·???ESD????????????±????????????·???ò???????è±?????ESD??????±í1?è????????????????ESD??·?·????????°·???×÷??????????

????·?????????

?????????ú??????????????????????????±????ò??×??è±???ESD?????????????à??±??¤???????????¨???????÷????????20kV????ESD?·????

????A1. ?·±???×??è±????????÷?????????·???¤??????20mm??

????°ü?¨??·ì???¨·?????°?×°?×???????????§?????????????????????????¨???é???????????¨???é????±í??±??¨?????????????ü????

???????????§??????????????????????????????????????????×??????????÷??
????A2. ????×??è±?×°???ú??°????ò??????????????·ì?????·???¤????

????A3.???ú??????????±??¤??????????·ì???°°?×°?×?????ù???ì????·ì/???×??±????????????·???¤????

????A4.???????±?ò????±?????·???????×????????ò?????????????????÷??

????A5.???????????á??????????×??????ò????????±ú/?××?·??????????????·???¤????±????????????????¨????????±ú??

????A6.??LED?????ü?????÷×°???è±????×??????????×??ò????×????ü?????????????????ì?×??±????ò?????????????????·???¤????

????A7.???ì±??¤?ü??±?????????????????12mm???ò?????????ó?????????·???¤????

????A8. ???????÷???ü?ú????·ì???¨·????ò??°?×°?×??????????????±?????????×?????????×???

????A9. ?????ú?????????ü??×??è±??ò???????????????????????????????ú??????

????A10. ?????ú?·?????¨??×???/?????ò??????????????????ESD??????????°?×°???????§????????????×????ò??????

????A11.???????????ü???????·±????????????????ì?????????????·???¤????

????A12.??±??¤?ü?????·?????§???????????ò??·?????

??A13.???ú???????????????????????????è?÷???ò????????????±???·?ESD??·?????·?????

?ú??????±?

?????????????ú??????±???????×è??ESD???????°?à????????????????±??¤?è±?????????ESD???°?ì??????????????ESD×è?????ú????????????????????????×??è±??????????????ú??????????????20kV???÷??????(???òA1??A9)???????????ú??????×??è±?????????±?1,500V?÷????????·????????????????????ó?·???¤???ó??????2.2mm??

????????????????ESD????±??ü???§??

????B1. ?????è???????è??????????±????????????ú????


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????????????????????×?(·?±à??)?ò??????(±à??)??
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????B2. ????????????????????(????×è????)??????????±í2??

????B3. ??????±????????????????????????????????????????á??????????±í2??1. ?à????????????±?????????????(EMF)????????0.75V?????????????????±???·??????????±?????????????±???????0.25V??2. ????(????)???????????????ó??????(????)??????

????B4. ??·ì???í??5±?????????±?????????????·ì????

????B5. ????±?????????????????20mm(0.8????)???à???¨????????????????·???????????????

????B6. ??????????·ì????????????????????????·ì???????á???????¨?·??

????B7. ?????±??????·ì????±???±????é????

????B8. ±?????±????????????±???????°???ó????????

????B9. ?·±??×??????????20mm???°?????¤??????????20mm???à???????????????????????×±???????

????B10. ???????ó?ó?????????°???????÷????????????×??????????÷?????è??????????±???

????B11. ?????????????????????????????ú???????ó????????

????B12. ???????????????????????????à?????ó??

????B13. ???????è±??????????÷????????·?????±??????ú????????????????

????B14. ????????(????????)?è±???????±??????????????ü?????·????????????????

????B15. ?????ü??×??è±???????·??????????????ò??????±?(?????ò????/????±??¤·???)?????????ú??????????±??????????????????????????ú?????ò?????·??????????

????B16. ???????????????????ü??°????????????????ü±????ò??????????????

????B17. ????±?×°???????????÷??????????ESD???÷?÷????·??ò??????

????B18. ?±????????ESD?????±?????????????????·°???±?°?????°?×°????????????±?×°????

???????????????÷???????÷???ò????????·????????????ú?????ò?????·??????????

??????°?×°?×?????????????????§???????????????±???????????????ò?????????§????????????????????

???????·°?/±?°?????????·???????±??¤/???ò??????±??¤/????°????????ú?????????÷??????????°?·?????????±???????±????????×??????

???????×?????????????????????ò??????????????(??B1)??
????B19. ???????ú????????????°????ü????????°?×°??????±?×°????×è??ESD??

?????????????÷?????ò???????????÷?????????????????ú?????ò?????·????????

????????????????±?????????????????????????±?×°????????/??×???/?????÷??????????????

????????????????????±??¤/???ò??????±??¤/????°????ò???????????????ò????????????
????B20. ????°???????±????????????????ò?????á????????????????????????????

????B21. ???????ó??20??40dB????±??§????

????B22. ???????????????°??·ì???????????????÷??????????

????B23. ??????????????????????????????????????????

????B24. ??????????????????????????????????????????±í???¨???????÷???????????ù????????????×è????????

????B25. ??????????????±??????????á????????

????B26. ?????à??????????±í???±???????????????????¤??????????????????????

????B27. ????????°???????????????????????????×??????à?????????????????????·????????????

????B28. ?????????§????±?????(?÷???????????÷??????????????????)???????÷???ú????±?×°??????????????

????B29. ????×÷?±?????????????????????á??????????????????(??????)?·????±????ü???????????ü??

????B30. ??????×÷?±?????ú?ú??????°?±????ò????????·?????????·????????????á±?????·?????????°??????????ü?à????ESD???°?ì??

????B31. ??±??¤?ü?????·???????à???????ü???·????·?????????????????????

??????°??¨

????ESD???????÷·????±?×????±??÷???????????????ú?????????????ó?÷???????????????????·???????????÷?ü???×????×????ò?????í????×??????????????????÷?????????????????¨??°??¨(binding)?¨????×è?????·???????????à??????????????????×????????????ò?á??×?????·??????????????·????????????????°??¨???????§??·???ESD???????·±?ESD???÷?????????÷?·??×è????????????

????C1.??ESD???÷?¤???á?÷?????????????à????????

????C2.???¤??ESD???÷???á?÷??????????????????????

????C3.???ú??????????·????×????????????????

????C4.?·±??????????????????ú???????à????40mm(1.6????)??????

????C5.???????÷???????????????????????????ú????????

????C6.??±??¤?ü?????§·????í??????±??¤?·?????·?????§???????????ú???????ò???????????????????????????ú??????????????±??¤?·??PCB??????????????

????C7.?????ü?????÷????·????????????÷??????????????L-C?ò?????é-???????¨?÷?????????÷???ú????????

????C8.?·±??????????ú????????×??è±????à???ó??????2.2mm??

????C9.???ú?????????·?????????????????????é??

????C10.?·±?°??¨???·???????????????????¤?í±?????×???????????5:1??

????C11.?????????????à??°??¨???·??????±???ESD???÷??·???????

????C12.?·±?°??¨???·??°??¨???????×???°?ì????×??è±??ò????????×??è±?????????

????C13. ????°??¨???·??°??¨???????????°??????/????·????±??????????????????????±í2??

????1. ?à?????ü????????????EMF±???????0.75V?????????±?????·????EMF??±???????0.25V??

????2. ????(????)?????????????ó??????(????)??????

????C14.??????????±ú???????????????????ò???????×????±?×°??????

????C15.?·±?°??¨????°??¨???????×??ESD?°?ì??PCB??

????C16.??????????????°??¨???ò°??¨????

????C17. ?¨???????????????????ò???ú???ú??·?????????????·?????????????

????C18.????×÷/??????????±???·??????????????¨????????·???°??¨??????1.????????±í??±??????à???±????????2.??????±???????????????±í???±????????????

????C19.????°??¨??????±à??°??¨????

????C20.?·±?°??¨?????±????

????C21.?????à?????????ú?????ù?????·°??????????ò??????????????????

????C22.?·±?°??¨???????????í???ó??5mm??

±??¤????

??????×??è±???????????·?????????????ESD???????????????÷?????ó???????????è?????ú??????·???????·?·?ESD??

????D1.???????????à???????·??????????????????

????D2.???????ù????????????×??è±?????·?·????????é??

????D3.????????????????????????×??è±??ú????????·????????÷?????÷????????????????×è(MOV)?ò??1kV??????????

????D4. ×?????PCB??????ר???????????????????ò?????????????????¤???????????ó?????·????????????

??ESD???????????è??

?????¨??PCB??·????è???????±????????????°?×°???°????ESD·?·?·?·¨????????PCB????ESD?è??????????????????ESD???????¨?????¨??????????-????????-???????????ù?????????????????????????????°?ì?????éPCB???è??????PCB?è???????????¨???¤???????????ó?à???è???????????????????÷????

???÷??PCB??????????????????×?????ESD·?·???????

????E1.???????????à??PCB??

?????à????????PCB?????????????????????????°????????????????-???????à????????????×è??(common impedance)????????????????????????PCB??1/10??1/100??

?????????????????????????????????????ò????????

???????????????×??±í?????????÷?????????????????????°?í?à??????????????PCB???????????????????????ó?à?????????????°?????????????????????????ò???à??????±???±???????·¨????????
E2.????????PCB???????????????????????????????¤????

????????????????
?????±?????????ò?????????????????????à????????
???????¤??????????????60mm??
???????????¤????????????13mm(0.5????)??
????E3.?·±??????????·????????????

????E4.?????????ù???????÷??·?????±???

????E5.?????????????????????¨?????????????????????×?±??????ESD?°?ì?????ò??

????E6.?????ò?ú???????????÷(???×?±??±?ESD?÷??)??·????ù??PCB????????·????í???ú?????ò???à±??????????????????ó??13mm???à???????×???ü??????????????

????E7.???¨??±?????·???°?×°?×??°?×°?×???§????×è?????????????×?????????????ú????????

????E8. PCB×°???±?????????????ò???×?????????????????????????????????????????????¤??????PCB???????ú??/??±????ò?????????§??????????????

????E9.???????????ú?????????·???????????è???à?????°???????±????????????±????????à????0.64mm(0.025????)??

????E10.???¨?????????×?????ü°?×°?×????????????100mm(4.0????)???ú?????????ú?????????·????1.27mm?í(0.050????)???????????????????????????????à?????????ú?????????·??????·???????°?×°???????ò°?×°?×????????????????????????????????±??????·???ò?????é/????????????????????±?ESD?????±???????ú????

????E11.???????·°????á·????????ú???ò????±?×°???????????·°??????????×???ú??????????????×è?????????ù?ü??????×÷??ESD??????·???°???

????E12.????????·????????·???§?è???????·??????

??????±????????÷???°?ú???????????????????§????·????·?????¨?·??

?????·±??ù???????·?????í???ó??2.5mm (0.1????)??

????????13mm(0.5????)?????×???·??????????????

???????·???????à?????·????????????????????

??????°?×°???????ú???ò????±?×°??????????°??????????????·?????????·????????????????

????????±??????????·?ò???????·???????????ú???????·????????????×è????????±????·???????????±ESD??·???°??????·????(?ù????)??????????????????·???????0.5mm?í(0.020????)???????????ù????±????????????ó???·?·??

???????????????·???????à??????????0.5mm??
????E13.????±?ESD?±???÷???????ò?????????????????ü????????????????

????E14.I/O???·???????????ü???????????÷??

????E15.???×??ESD?°?ì?????·??????·??????ü???·?????????ò?????ù???ü?????·???????ü???á?????¨????±?×÷????

????E16.?¨??????????·???????????×è?????é???????????×±?ESD?÷?????????????÷????????????????????·???????????×è?ò???é??

????E17.?¨??????????·???????±??¤?÷??1.????????????(?¤??????5±??í????×???????3±??í??)???????ú??????2.???????÷?????????????????????±??????????±??¤?÷?????ó?????????·?????ü??·???

????E18.???????÷???ò???????????·25mm(1.0????)??·??§??????·??????¨??????1.???????????????????ú?????ò?????????·??(?¤??????5±??í????×???????3±??í??)??2.???????????????????????????????????????·??

????E19.???·±?????????????????

????E20.?????????¤???ó??300mm(12????)?±?????¨??????????????????

????E21.?·±??????????à?????·???????·?·???????????????????¤???????????????×?ò???????÷???????????????????????????·?·??????

????E22.?????????????????????????????à?????????·??

????E23.?·±????????????????·?·???????????????????ü???????·??????????????????????·?·?????????????????

????E24.???à?????????????÷80mm(3????)·??§????·??????????????·??????

????E25.?????????é???????????????????????????ò??????60mm?à?????ù??????????????????????

????E26.?·±????????ó??????????(?ó???ó??25??6mm(1??0.25????))???????à·???????????????????????

????E27.?????ò?????????????¤??????8mm(0.3????)?±???????????????????????à??????????

????E28.???????????????????ò??±?????·????????????????????üPCB±???????·???

????E29.??°?×°?×?????·?????????????????ò?????ü????????????1.?????§??±???????????±?×°???ò???ú???????????±???????????????·?·??×è??????????2.?·?¨°?×°?×?ó?????????????ò???????§????????°?×°????°?×°?×???????×???????????ó???????×????????????????×è?????????·±????????????????¨·????¤????????

????E30.????????±??¤??????????????±??¤??????????????????

????E31.????±?×?????????????????????????????????1.?????????????¨??2.?????????????????·??3.???????·°?±?????

????E32.PCB???????ú??????????°?×°???????????ò????????·ì????

????E33.??×??????é???????????????????????????é???????????????????????é?????????à?±?????????á?ú?ú???????????·????

????E34.?????????ú???ò???÷°?????×°???????·?¨??????????????×??????????·?¨·???×???????





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