In PCB uyilo, uxhathiso lwe-ESD lwe-PCB lunokufezekiswa ngokubeka, ubeko olufanelekileyo kunye nofakelo. Ngexesha lenkqubo yoyilo, uninzi lotshintsho kuyilo lunokulinganiselwa ekongezeni okanye ekususeni izinto ngokubikezela. Ngokuhlengahlengisa ubeko lwePCB kunye nokufaka iintambo, i-ESD inokuthintelwa kakuhle.

Umbane ongagungqiyo ovela emzimbeni womntu, okusingqongileyo kwaye nangaphakathi kwizixhobo ze-elektroniki kunokubangela ukonakala okungafaniyo kwiichips ze-semiconductor ezichanekileyo, ezinje ngokungena kumaleko amancinci okugquma ngaphakathi kwezinto; Ukonakala kwamasango eMOSFET kunye nezinto zeCMOS; Ukucofa ukuvala isixhobo seCMOS; Umjikelo wesekethe ojika-jika kwi-PN; Ukujikeleza okufutshane kwe-PN; Nyibilikisa ucingo lwe weld okanye ucingo lwealuminium ngaphakathi kwesixhobo. Ukuphelisa ukuphazamiseka kunye nokonakaliswa kokukhutshelwa ngombane (i-ESD) kwizixhobo ze-elektroniki, kuyafuneka ukuba uthathe amanyathelo ngeendlela zokuthintela.

Ungawuphucula njani umsebenzi we-anti-ESD kuyilo lwe-PCB

Kuyilo lwebhodi ye-PCB, uyilo oluchasene ne-ESD lwe-PCB lunokufezekiswa ngokubeka, ubeko olufanelekileyo kunye nofakelo. Ngexesha lenkqubo yoyilo, uninzi lotshintsho kuyilo lunokulinganiselwa ekongezeni okanye ekususeni izinto ngokubikezela. Ngokuhlengahlengisa ubeko lwePCB kunye nokufaka iintambo, i-ESD inokuthintelwa kakuhle. Nazi ezinye iindlela zokuthintela.

Sebenzisa ii-PCBS ezininzi xa kunokwenzeka. Umhlaba kunye neenqwelomoya zamandla, kunye nolayini obungqindililiweyo womgca womhlaba, unokunciphisa ukunganyangeki kwendlela eqhelekileyo kunye nokudityaniswa kwe-1/10 ukuya ku-1/100 ye-PCB enamacala amabini xa kuthelekiswa ne-PCB enamacala amabini. Zama ukubeka umaleko ngamnye wesiginali kufutshane namandla okanye umaleko womhlaba. Kwii-PCBS ezixineneyo ezinamacandelo kwindawo ephezulu kunye nezantsi, unxibelelwano olufutshane kakhulu, kunye nokuzaliswa komhlaba okuninzi, cinga ngokusebenzisa imigca yangaphakathi.

Kwii-PCBS ezinamacala amabini, kusetyenziswa umbane odityanisiweyo kunye neigridi. Intambo yamandla ikufutshane nomhlaba kwaye kufuneka idityaniswe kangangoko phakathi kwemigca ethe nkqo kunye ethe tye okanye imimandla yokugcwalisa. Ubungakanani begridi yecala elinye buya kuba ngaphantsi okanye bulingane nama-60mm, okanye bungaphantsi kwe-13mm ukuba kunokwenzeka.

Qinisekisa ukuba isiphaluka ngasinye sihambelana ngokusemandleni.

Beka zonke izihlanganisi ecaleni kangangoko kunokwenzeka.

Ukuba kunokwenzeka, thumela intambo yombane ukusuka embindini wekhadi kude neendawo ezichazwe ngqo kwi-ESD.

Kuzo zonke izaleko zePCB ezantsi kwesinxibelelanisi esikhokelela ngaphandle kwetyala (elithambekele ngqo kwi-ESD hits), beka i-chassis ebanzi okanye ipoligoni egcwele imigangatho kwaye uyixhume kunye nemingxunya malunga ne-13mm.

Imingxuma yokubeka ibekwe emaphethelweni ekhadi, kwaye iiphedi ezingaphezulu nezisezantsi ezivulekileyo zixhunywe kumgangatho we-chassis ejikeleze imingxunya enyukayo.

Xa uhlanganisa i-PCB, sukufaka nayiphi na into ethembekileyo kwi-pad ephezulu okanye ezantsi. Sebenzisa izikhonkwane kunye neawashi eyakhelweyo ukubonelela ngonxibelelwano oluqinileyo phakathi kwe-PCB kunye ne-chassis yesinyithi / ikhaka okanye inkxaso kwinkalo yomhlaba.

Kwindawo enye “yokuzahlula” kufuneka ibekwe phakathi komgangatho we-chassis kunye nomgangatho wesekethe kumaleko ngamnye; Ukuba kunokwenzeka, gcina isithuba kwi-0.64mm.

Phezulu nasezantsi kwekhadi kufutshane nomngxunya onyukayo, qhagamshela umhlaba we-chassis kunye nomhlaba wesekethe ngee-1.27mm iingcingo ezibanzi qho nge-100mm ecaleni kocingo lomhlaba lwechassis. Ecaleni kwezi ndawo zonxibelelwano, iphedi okanye umngxunya wokufaka ufakelo lubekwe phakathi komhlaba we-chassis kunye nomhlaba wesekethe. Olu nxibelelwano lomhlaba lunokunqunyulwa ngebhley ukuba luhlale luvulekile, okanye utsibe ngamaso emagnethi / ii-capacitors ezihamba rhoqo.

Ukuba ibhodi yesekethe ayizubekwa kwityesi yesinyithi okanye isixhobo esikhuselayo, ucingo oluphezulu kunye nolusezantsi kwibhodi yesekethe ayinakho ukufakwa kwi-solder ukumelana, ukuze zisetyenziswe njenge-ESD arc ekhupha i-electrode.

Iringi iseti ijikeleze isekethe ngale ndlela ilandelayo:

(1) Ukongeza kwisinxibelelanisi somda kunye ne-chassis, wonke umda wokufikelela kweringi.

(2) Qinisekisa ukuba ububanzi bazo zonke izaleko bungaphezulu kwe-2.5mm.

(3) Imingxunya idityaniswe kwisangqa rhoqo nge-13mm.

(4) Dibanisa umhlaba ojikelezayo kunye nomhlaba oqhelekileyo wesekethe eyahlukeneyo kunye.

(5) Iipaneli eziphindwe kabini ezifakwe kwityala okanye izixhobo ezikhuselayo, umhlaba weringi uya kuqhagamshelwa kumhlaba oqhelekileyo wesekethe. Isiphaluka esinamacala amabini esingabanjwanga kufuneka sidityaniswe kumhlaba weringi, umhlaba weringi akufuneki uthanjiswe ngumsinga, ukuze umhlaba weringi ukwazi ukusebenza njengesixhobo sokukhupha i-ESD, ubuncinci isithuba esisi-0.5mm ububanzi kumhlaba weringi (konke maleko), ukuze kuthintelwe iluphu enkulu. Ukufakelwa kweentambo zombane akufuneki kubengaphantsi kwe-0.5mm kude kumhlaba weringi.