In PCB ukuklama, ukumelana kwe-ESD kwe-PCB kungabonakala ngokubeka, ukwakheka okufanele nokufakwa. Ngesikhathi senqubo yokuklama, izinguquko eziningi zedizayini zingakhawulelwa ekungezeni noma ekususeni izinto ngokubikezela. Ngokulungisa ukwakheka kwe-PCB nezintambo, i-ESD ingavinjelwa kahle.

Ugesi ongaguquguquki ovela emzimbeni womuntu, imvelo ngisho nangaphakathi kwamadivayisi we-elekthronikhi kungadala ukulimala okuhlukahlukene kuma-chip semiconductor chips, njengokungena ungqimba oluncane lokufakwa ngaphakathi ezintweni; Ukulimala kwamasango wezinto ze-MOSFET ne-CMOS; Qalisa ukukhiya kudivayisi ye-CMOS; I-junction ye-PN yesikhashana esifushane; Ukuhlangana kwe-PN kwesikhashana esifushane; Ncibilikisa i-weld wire noma i-aluminium wire ngaphakathi kwensiza esebenzayo. Ukuze kuqedwe ukuphazamiseka nokonakala kokukhishwa kwe-electrostatic (ESD) ezintweni zikagesi, kuyadingeka ukuthatha izinyathelo ezahlukahlukene zobuchwepheshe ukuvimbela.

Ungawuthuthukisa kanjani umsebenzi we-anti-ESD ekwakhiweni kwe-PCB

Ekuklanyweni kwebhodi le-PCB, ukwenziwa kwe-anti-ESD kwe-PCB kungabonakala ngokubeka, ukwakheka okufanele nokufakwa. Ngesikhathi senqubo yokuklama, izinguquko eziningi zedizayini zingakhawulelwa ekungezeni noma ekususeni izinto ngokubikezela. Ngokulungisa ukwakheka kwe-PCB nezintambo, i-ESD ingavinjelwa kahle. Nazi ezinye izindlela zokuzivikela ezivamile.

Sebenzisa ama-PCBS amaningi lapho kungenzeka khona. Izindiza zomhlaba namandla, kanye nolayini abahlukaniswe ngocingo womugqa womhlabathi, kunganciphisa ukuvinjelwa kwemodi ejwayelekile nokuhlangana okunamandla ku-1/10 kuye ku-1/100 we-PCB emaceleni omabili uma kuqhathaniswa ne-PCB emaceleni amabili. Zama ukubeka ungqimba wesiginali ngamunye eduze kongqimba lwamandla noma lomhlabathi. Kuma-PCBS amakhulu kakhulu anezinto kuzo zombili izindawo eziphezulu nezingezansi, ukuxhumana okufushane kakhulu, nokugcwaliswa okuningi komhlaba, cabanga ukusebenzisa imigqa yangaphakathi.

Kuma-PCBS anezinhlangothi ezimbili, kusetshenziswa ugesi ohlanganiswe ngokuqinile kanye namagridi. Intambo yamandla iseduze nomhlabathi futhi kufanele ixhunywe ngangokunokwenzeka phakathi kwemigqa emi mpo futhi ivundlile noma iziza zokugcwalisa. Usayizi wegridi wohlangothi olulodwa uzoba ngaphansi noma ulingane no-60mm, noma ube ngaphansi kuka-13mm uma kungenzeka.

Qiniseka ukuthi isifunda ngasinye sihlangene ngangokunokwenzeka.

Beka zonke izixhumi eceleni ngangokunokwenzeka.

Uma kunokwenzeka, qondisa intambo yamandla ukusuka maphakathi nekhadi kude nezindawo ezivezwe ngqo ku-ESD.

Kuzo zonke izingqimba ze-PCB ezingezansi kwesixhumi esiholela ngaphandle kwecala (ethambekele ekuqondiseni ukushaywa kwe-ESD), beka i-chassis ebanzi noma ifolishi eligcwele phansi bese uzixhuma kanye nezimbobo cishe ngezikhathi ezingama-13mm.

Izimbobo zokufaka zifakwa onqenqemeni lwekhadi, futhi amaphedi aphezulu nangaphansi wokuchichima okuvulekile axhunywe phansi kwaseshashini elizungeze izimbobo ezikhuphukayo.

Lapho uhlanganisa i-PCB, ungasebenzisi noma iyiphi i-solder phezulu noma phansi. Sebenzisa izikulufo ngama-washer akhelwe ngaphakathi ukuhlinzeka ukuxhumana okuqinile phakathi kwe-PCB nensimbi chassis / isihlangu noma ukwesekwa ebusweni bomhlaba.

“Indawo yokuhlukaniswa” efanayo kufanele isethwe phakathi kwetheyisi chassis nefulethi lesifunda kusendlalelo ngasinye; Uma kungenzeka, gcina isikhala ku-0.64mm.

Ngaphezulu nangaphansi kwekhadi eduze komgodi okhuphukayo, xhuma umhlaba we-chassis kanye nomhlabathi wesifunda ngezingcingo ezibanzi ze-1.27mm njalo nge-100mm ngocingo lwaphansi lwe-chassis. Eduze kwalezi zindawo zokuxhuma, kubekwa iphedi noma imbobo yokufaka phakathi kwendawo yomgibeli kanye nomhlabathi wesifunda. Lezi zixhumanisi zomhlaba zingasikwa ngensimbi ukuze ihlale ivulekile, noma igxume ngobuhlalu kazibuthe / ama-capacitors aphezulu.

Uma ibhodi lesifunda lingenakufakwa ku-chassis yensimbi noma kudivayisi yokuvikela, ucingo lwaphansi lwe-chassis ephezulu nolaphansi lwebhodi lesifunda alikwazi ukufakwa ukumelana ne-solder, ukuze lisetshenziswe njenge-electrode ye-ESD arc.

Iringi isethwe izungeze isifunda ngale ndlela elandelayo:

(1) Ngokungeziwe kusixhumi esinqenqemeni ne-chassis, yonke imingcele yokufinyelela kweringi.

(2) Qinisekisa ukuthi ububanzi bazo zonke izingqimba bukhulu kune-2.5mm.

(3) Izimbobo zixhunywe eringini njalo nge-13mm.

(4) Xhuma umhlabathi owejwelayo kanye nendawo evamile yesekethe lezingqimba eziningi ndawonye.

(5) Kumapaneli aphindwe kabili afakwe ezimeni zensimbi noma kumadivayisi okuvikela, indawo eyiringi izoxhunywa endaweni evamile yesekethe. Isifunda esinamacala amabili esingavikelekile kufanele sixhunywe emhlabathini wendandatho, umugqa wendandatho akufanele ugcotshwe ukugeleza, ukuze umhlaba oyindandatho ube yinduku yokukhipha i-ESD, okungenani igebe elingu-0.5mm ububanzi enhlabathini yendandatho (konke izingqimba), ukuze kugwenywe iluphu enkulu. Ukuxhunywa kwesiginali akufanele kube ngaphansi kuka-0.5mm kude nomhlabathi wendandatho.