Kubva pamigumisiro yekuedza yezvigadzirwa zvakasiyana-siyana, zvinowanikwa kuti ESD iyi muedzo wakakosha zvikuru: kana bhodhi redunhu risina kugadzirwa zvakanaka, kana magetsi akamira akaiswa, achaita kuti chigadzirwa chiparadze kana kukuvadza zvikamu. Munguva yakapfuura, ndaingoona kuti ESD yaizokuvadza zvikamu, asi ini ndakanga ndisingatarisiri kubhadhara zvakakwana kune zvigadzirwa zvemagetsi.
ESD ndiyo yatinowanzo kudaidza kuti Electro-Static discharge. Kubva pane ruzivo rwakadzidza, zvinogona kuzivikanwa kuti static magetsi chinhu chechisikigo, icho chinowanzogadzirwa kuburikidza nekubatana, friction, induction pakati pemidziyo yemagetsi, nezvimwewo. Inoratidzwa nekuunganidza kwenguva refu uye high voltage (inogona kuunza zviuru zve volts. kana kunyange makumi ezviuru zve volts ye static magetsi) ), yakaderera simba, yakaderera ikozvino uye pfupi nguva yekuita. Zvezvigadzirwa zvemagetsi, kana iyo ESD dhizaini isina kugadzirwa zvakanaka, kushanda kwemagetsi nemagetsi zvigadzirwa kunowanzo kugadzikana kana kutokuvadzwa.
Nzira mbiri dzinowanzo shandiswa kana uchiita ESD discharge bvunzo: kubata kuburitsa uye kubuda kwemhepo.
Contact discharge ndeyekuburitsa zvakananga michina iri pasi pekuyedzwa; kubuda kwemhepo kunodaidzwawo kuti indirect discharge, iyo inogadzirwa nekubatana kwesimba remagineti rakasimba kune iri pedyo zvishwe. Iwo magetsi ekuyedza aya maviri bvunzo anowanzo 2KV-8KV, uye zvinodiwa zvakasiyana mumatunhu akasiyana. Naizvozvo, tisati tagadzira, tinofanira kutanga tafunga nezvemusika wechigadzirwa.
Mamiriro maviri ari pamusoro apa bvunzo dzekutanga dzezvigadzirwa zvemagetsi zvisingagone kushanda nekuda kwekuiswa kwemagetsi mumuviri wemunhu kana zvimwe zvikonzero kana muviri wemunhu ukasangana nezvigadzirwa zvemagetsi. Mufananidzo uri pasi apa unoratidza huwandu hwehunyoro hwemhepo hwemamwe matunhu mumwedzi yakasiyana yegore. Inogona kuonekwa kubva pamufananidzo kuti Lasvegas ine hunyoro hushoma gore rose. Zvigadzirwa zvemagetsi munzvimbo ino zvinofanirwa kubhadhara zvakanyanya kune ESD kuchengetedzwa.
Humidity mamiriro akasiyana munzvimbo dzakasiyana dzepasi, asi panguva imwe chete munharaunda, kana hunyoro hwemhepo husina kufanana, iyo static magetsi inogadzirwa yakasiyanawo. Tafura inotevera ndiyo data yakaunganidzwa, kubva iyo inogona kuonekwa kuti static magetsi inowedzera sezvo hunyoro hwemhepo hunoderera. Izvi zvinotsanangurawo zvisina kunanga chikonzero nei sparks dzakamira dzakagadzirwa pakubvisa juzi muchando chekuchamhembe dzakakura kwazvo. “
Sezvo magetsi asingachinji ari ngozi huru kudaro, tingaadzivirira sei? Paunenge uchigadzira kuchengetedzwa kwemagetsi, tinowanzo kukamura kuita matanho matatu: kudzivirira mhosva dzekunze kubva mukuyerera mubhodhi redunhu uye kukonzera kukanganisa; kudzivirira kunze magnetic fields kubva pakukuvadza bhodhi redunhu; kudzivirira kukanganisa kubva kumagetsi emagetsi.
Mune chaiyo dhizaini dhizaini, isu tichashandisa imwe kana dzakawanda dzeinotevera nzira dzekudzivirira kwe electrostatic:
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Avalanche diodes ekudzivirira kwe electrostatic
Iyi inzira zvakare inowanzoshandiswa mukugadzira. Iyo yakajairika nzira ndeyekubatanidza avalanche diode pasi nenzira yakafanana pane kiyi yechiratidzo mutsara. Iyi nzira ndeye kushandisa avalanche diode kupindura nekukurumidza uye kugona kudzikamisa iyo clamping, iyo inogona kupedza yakadzika yakakwira voltage munguva pfupi kuchengetedza bhodhi redunhu.
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Shandisa high-voltage capacitors yekudzivirira dunhu
Nenzira iyi, ceramic capacitors ine inomira voltage inosvika 1.5KV inowanzoiswa muI / O yekubatanidza kana chinzvimbo chekiyi chiratidzo, uye mutsara wekubatanidza ipfupi sezvinobvira kuitira kuderedza inductance yekubatanidza. line. Kana iyo capacitor ine low low stand voltage ikashandiswa, inokonzera kukanganisa kune capacitor uye kurasikirwa nekudzivirirwa kwayo.
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Shandisa ferrite bead pakudzivirira dunhu
Ferrite beads inogona kudzikisira ESD ikozvino zvakanyanya, uye zvakare inogona kudzvanya radiation. Paunotarisana nematambudziko maviri, ferrite bead isarudzo yakanaka kwazvo.
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Spark gap nzira
Iyi nzira inoonekwa muchidimbu chechinhu. Iyo chaiyo nzira ndeye kushandisa triangular mhangura ine matipi anoenderana nemumwe pane microstrip line layer inoumbwa nemhangura. Imwe magumo emhangura katatu yakabatanidzwa kune mutsara wechiratidzo, uye imwe yacho ndeye triangular mhangura. Batanidza pasi. Kana paine static magetsi, inoburitsa kubuda kwakapinza uye kushandisa simba remagetsi.
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Shandisa iyo LC sefa nzira kuchengetedza dunhu
Iyo sefa inoumbwa neLC inogona kunyatso kudzikisa yakakwira frequency static magetsi kubva pakupinda dunhu. Iyo inductive reactance hunhu hweinductor yakanaka kuvharidzira yakakwira frequency ESD kubva pakupinda dunhu, nepo capacitor ichivharira yakakwira frequency simba reESD pasi. Panguva imwecheteyo, iyi mhando yefirita inogona zvakare kutsvedzerera kumucheto kwechiratidzo uye kuderedza iyo RF maitiro, uye kuita kwacho kwakawedzera kuvandudzwa maererano nechiratidzo chekuvimbika.
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Multilayer board yekudzivirira ESD
Kana mari ichibvumidza, kusarudza multilayer board zvakare inzira inoshanda yekudzivirira ESD. Mune iyo yakawanda-layer board, nekuti kune yakazara pasi ndege padhuze nekutevera, izvi zvinogona kuita kuti ESD vaviri vaende kune yakaderera impedance ndege nekukurumidza, uyezve kudzivirira basa remasaini akakosha.
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Nzira yekusiya bhandi rekudzivirira pamucheto wemutemo wekudzivirira bhodhi redunhu
Iyi nzira inowanzo dhirowa mitsetse yakatenderedza redunhu bhodhi pasina welding layer. Kana mamiriro ezvinhu achibvumira, batanidza trace kune imba. Panguva imwecheteyo, zvinofanirwa kucherechedzwa kuti kuteedzera hakugone kuumba chivharo chakavharwa, kuitira kuti usaite loop antenna uye kukonzera dambudziko rakakura.
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Shandisa CMOS zvishandiso kana TTL zvishandiso zvine clamping diode kudzivirira wedunhu
Iyi nzira inoshandisa nheyo yekuzviparadzanisa kuchengetedza bhodhi redunhu. Nekuti michina iyi inodzivirirwa ne clamping diode, kuomarara kwedhizaini kunoderedzwa mune chaiyo yedunhu dhizaini.
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Shandisa decoupling capacitors
Aya decoupling capacitors anofanirwa kunge aine yakaderera ESL uye ESR kukosha. Kune yakaderera-frequency ESD, iyo decoupling capacitors inoderedza loop nzvimbo. Nekuda kwekuita kweESL yayo, iyo electrolyte basa iri kupera simba, iyo inogona zvirinani kusefa yakakwirira-frequency simba. .
Muchidimbu, kunyange zvazvo ESD inotyisa uye inogona kuunza migumisiro yakakomba, asi chete nekuchengetedza simba uye mitsetse yechiratidzo padunhu rinogona kudzivirira zvinobudirira ESD ikozvino kubva pakuyerera muPCB. Pakati pavo, mukuru wangu aigara achitaura kuti "nzvimbo yakanaka yebhodhi ndimambo". Ndinovimba mutsara uyu unogona zvakare kukuunzira mhedzisiro yekutyora skylight.