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[×???]
?è??ר??, ???·°??è??
????????×??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??????
?????????ú?ú???????????????????????÷?????ú?÷??
?????????ú?ú??·????????????????ò??????????
?????????ú?ú???????ò??????±??????à????????????????????
????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????
????°???
????±??¤/???ò??????±??¤/????°???
?????????á??????????????????
????????????????????×?(·?±à??)?ò??????(±à??)??
???????ò??????????
????????????
???????????í??
??????????
????????????????????????
???á??????±????????í?????ü??
????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???÷°?????×°???????·?¨??????????????×??????????·?¨·???×???????
欢迎光临 我要委托设计网论坛 (http://51odm.com/fourms/)
Powered by Discuz! 5.5.0
