The PCB ucingo lwethusi luyawa (okungukuthi, ngokuvamile kuthiwa ithusi liyalahlwa), futhi zonke izinhlobo ze-PCB zizothi kuyinkinga nge-laminate futhi zidinga izitshalo zabo zokukhiqiza ukuba zithwale ukulahlekelwa okubi. Ngokwesipiliyoni seminyaka ekusingatheni izikhalazo zamakhasimende, izizathu ezijwayelekile zokulahlwa kwe-PCB yilezi ezilandelayo:

1. Izici zenqubo yefekthri ye-PCB:

1). Ukufakwa ngokweqile kwe-copper foil.

Ucwecwe lwethusi lwe-electrolytic olusetshenziswa emakethe ngokuvamile luwuthayela olunohlangothi olulodwa (oluvame ukwaziwa ngokuthi ucwecwe lomlotha) kanye nocwecwe lwethusi olunohlangothi olulodwa (olwaziwa ngokujwayelekile ngokuthi ucwecwe olubomvu). Izindwangu zethusi ezivamile ngokuvamile ziyi-foil yethusi eyenziwe ngothayela engaphezu kuka-70um, ucwecwe olubomvu no-18um. I-ashing foil elandelayo ngokuyisisekelo ayinakho ukwenqatshwa kwe-batch yethusi. Lapho umklamo wesifunda ungcono kunomugqa wokufaka, uma ukucaciswa kwe-foil yethusi kuguqulwa ngaphandle kokushintsha imingcele yokufaka, lokhu kuzokwenza ukuthi i-foil yethusi ihlale kusixazululo sokufaka isikhathi eside.

Ngenxa yokuthi i-zinc ekuqaleni iyinsimbi esebenzayo, lapho ucingo lwethusi oluku-PCB lucwiliswe esixazululweni se-etching isikhathi eside, luzodala ukugqwala okukhulu okuseceleni kwesekethe, okubangele ukuthi ungqimba oluthile lwesekethe olusekela i-zinc lusabele ngokuphelele futhi luhlukaniswe. i-substrate, okungukuthi, Ucingo lwethusi luyawa.

Esinye isimo ukuthi akukho nkinga ngemingcele yokunamathisela kwe-PCB, kodwa ukuwasha nokomisa akukuhle ngemva kokushumeka, okubangela ukuthi ucingo lwethusi luzungezwe isisombululo esisele sokunamathisela endaweni ye-PCB. Uma ingacutshungulwa isikhathi eside, izophinde ibangele ukushumeka kohlangothi okweqile kocingo lwethusi. ithusi.

Lesi simo ngokuvamile sigxile emigqeni emincane, noma lapho isimo sezulu sinomswakama, amaphutha afanayo azovela kuyo yonke i-PCB. Hlubula ucingo lwethusi ukuze ubone ukuthi umbala wendawo ethintana nayo nesendlalelo sesisekelo (okuthiwa indawo eqinile) ushintshile, ohlukile kulowo wethusi ovamile. Umbala we-foil uhlukile, umbala wethusi wokuqala wesendlalelo esingezansi ubonakala, futhi amandla okuxebuka we-foil yethusi emgqeni owugqinsi nawo ajwayelekile.

2). Enqubweni yokukhiqiza ye-PCB, ukungqubuzana kwenzeka endaweni, futhi ucingo lwethusi luhlukaniswa ne-substrate ngamandla angaphandle asebenzayo.

Lokhu kusebenza okubi kunenkinga ngokuma, futhi ucingo lwethusi luzosonteka ngokusobala, noma imihuzuko noma amamaki omthelela ohlangothini olufanayo. Uma ususa ucingo lwethusi engxenyeni enesici futhi ubheka ubuso obumangelengele be-foil yethusi, ungabona ukuthi umbala we-foil yethusi ujwayelekile, ngeke kube nokuguguleka ohlangothini, namandla okuxebuka. ye-foil yethusi ijwayelekile.

3). Idizayini yesekethe ye-PCB ayinangqondo.

Ukusebenzisa i-foil yethusi ewugqinsi ukuklama isekethe ezacile kakhulu kuzophinde kubangele ukushumeka ngokweqile kwesekethe nokulahla ithusi.

2. Izizathu zenqubo yokukhiqiza i-laminate:

Ngaphansi kwezimo ezijwayelekile, ucwecwe lwethusi kanye ne-prepreg kuzohlanganiswa ngokuphelele inqobo nje uma isigaba sokushisa esiphezulu se-laminate sishisa sicindezelwe ngaphezu kwemizuzu engama-30, ngakho ukucindezela ngokuvamile ngeke kuthinte amandla okubopha kwe-foil yethusi kanye i-substrate ku-laminate. Kodwa-ke, ngesikhathi sokupakisha kanye nokupakisha ama-laminates, uma ukungcoliswa kwe-PP noma ucwecwe lwethusi lomonakalo omaholoholo, kuzophinde kubangele amandla okuxhumana anganele phakathi kwecwecwe lethusi kanye ne-substrate ngemva kokufakwa kwe-laminate, okuholela ekuphambukeni kokuma (kuphela kumapuleti amakhulu) ) Noma izintambo zethusi ezingavamile ziyawa, kodwa amandla okuxebuka efoyili yethusi eduze kwezintambo ezicishiwe ngeke abe angajwayelekile.

3. Izizathu zezinto zokusetshenziswa kwe-laminate:

1). Njengoba kushiwo ngenhla, ama-foil ethusi e-electrolytic avamile yonke imikhiqizo efakwe ama-galvanized noma i-copper-plated. Uma inani eliphakeme le-wool foil lingavamile ngesikhathi sokukhiqiza, noma lapho i-galvanized/copper-plated, amagatsha e-crystal plating mabi, okwenza i-foil yethusi ngokwayo Amandla okuxebula awanele. Ngemuva kokuthi i-foil ecindezelwe izinto zeshidi lenziwe i-PCB, intambo yethusi izowa uma ithintwa amandla angaphandle uma ixhunywa efekthri ye-electronics. Lolu hlobo lokwenqatshwa kwethusi olubi ngeke lube nokugqwala okusobala ohlangothini lapho uxebula ucingo lwethusi ukuze ubone indawo eqinile ye-foil yethusi (okungukuthi, indawo yokuxhumana ne-substrate), kodwa amandla okuxebuka ayo yonke i-foil yethusi azoba kakhulu. mpofu.

2). Ukungaguquguquki kahle kwe-foil yethusi ne-resin: Amanye ama-laminates anezakhiwo ezikhethekile, njengamashidi e-HTG, asetshenziswa okwamanje. Ngenxa yezinhlelo ezihlukene ze-resin, i-ejenti yokwelapha esetshenziswayo ngokuvamile i-PN resin, futhi isakhiwo se-resin molecular chain silula. Izinga lokuxhumanisa liphansi, futhi kuyadingeka ukusebenzisa i-copper foil ene-peak ekhethekile ukuyifanisa. I-foil yethusi esetshenziswa ekukhiqizeni ama-laminates ayifani nesistimu ye-resin, okuholela ekuqineni kwekhasi okwanele kwe-sheet metal-clad metal foil, kanye nokuchithwa kwezintambo zethusi okubi ngesikhathi sokuxhuma.