Izinkinga ezingokoqobo zokuhlawuliswa PCB production

Ngokuthuthukiswa komkhakha we-elekthronikhi, ukuhlanganiswa kwezakhi ze-elekthronikhi kuphakeme futhi kuphakeme, futhi ivolumu incane futhi incane, futhi uhlobo lwe-BGA lokufaka lusetshenziswa kakhulu. Ngakho-ke, isifunda se-PCB sizoba sincane futhi sincane, futhi inani lezendlalelo lizoba ngaphezulu. Ukunciphisa ububanzi bomugqa nokuhlukaniswa kwemigqa ukusebenzisa kahle indawo enomkhawulo, futhi ukwandisa inani lezendlalelo ukusebenzisa isikhala. Okujwayelekile kwebhodi lesifunda ngokuzayo kungama-2-3mil noma ngaphansi.

Kuyinkolelo evamile ukuthi ngaso sonke isikhathi lapho ibhodi lesifunda lokukhiqiza likhuphuka noma likhuphuka ebangeni, kufanele litshalwe kanye, futhi imali yokutshala imali inkulu. Ngamanye amagama, amabhodi wesifunda aphezulu akhiqizwa yimishini esezingeni eliphakeme. Kodwa-ke, akuwona wonke amabhizinisi angakhokhela utshalomali olukhulu, futhi kuthatha isikhathi esiningi nemali ukwenza izivivinyo zokuqoqa idatha yenqubo kanye nokukhiqizwa kwesivivinyo ngemuva kokutshalwa kwezimali. Isibonelo, kubukeka kuyindlela engcono yokwenza isivivinyo nokukhiqizwa kwesivivinyo ngokuya ngesimo esivele sikhona sebhizinisi, bese unquma ukuthi utshale imali ngokuya ngesimo sangempela nesimo semakethe. Leli phepha lichaza ngokuningiliziwe umkhawulo wobubanzi bolayini obuncane obungakhiqizwa ngaphansi kwesimo semishini ejwayelekile, kanye nezimo nezindlela zokukhiqizwa komugqa omncane.

Inqubo yokukhiqiza ejwayelekile ingahlukaniswa ibe yindwangu yokumboza imbobo kanye nendlela yokuqhafaza, zombili ezinezinzuzo nezinkinga zazo. Isifunda esitholwe ngendlela yokufakwa kwe-asidi sifanelana kakhulu, esivumelana nokulawulwa kwe-impedance kanye nokungcola okungatheni kwemvelo, kepha uma imbobo yephukile, izosuswa; Ukulawulwa kokukhiqizwa kwe-alkali kulula, kepha ulayini awalingani futhi ukungcoliswa kwemvelo nakho kukhulu.

Okokuqala, ifilimu eyomile yingxenye ebaluleke kakhulu ekukhiqizeni ulayini. Amafilimu ahlukene omile anezinqumo ezihlukile, kepha ngokuvamile angakhombisa ububanzi bomugqa kanye nesikhala somugqa se-2mil / 2mil ngemuva kokuvezwa. Ukulungiswa komshini ojwayelekile wokuchayeka kungafinyelela ku-2mil. Ngokuvamile, ububanzi bomugqa nolayini phakathi kwaleli banga ngeke kudale izinkinga. Ku-4mil / 4mil linewidth spacing noma ngenhla, ubudlelwano phakathi kwengcindezi kanye nokuhlungwa kwemithi ketshezi akukuhle. Ngezansi kwe-3mil / 3mil linewidth spacing space, the nozzle is the key to affect the resolution. Ngokuvamile, kusetshenziswa umbhobho omise okwe fan, futhi ukuthuthukiswa kungenziwa kuphela lapho ingcindezi icishe ibe yi-3bar.

Yize amandla okuchayeka enethonya elikhulu kulayini, iningi lamafilimu omile asetshenziswa emakethe ngokuvamile anebanga lokuvezwa elibanzi. Kungahlukaniswa ezingeni le-12-18 (irula yokuvezwa kwezinga lama-25) noma ileveli 7-9 (irula lokuvezwa kweleveli 21). Ngokuvamile, amandla okuvezwa okuphansi alungele isinqumo. Kodwa-ke, lapho amandla ephansi kakhulu, uthuli namasundies ahlukahlukene emoyeni anomthelela omkhulu kuwo, okuholela ekuvulekeni kwesifunda (i-acid corrosion) noma isifunda esifushane (i-alkali corrosion) kwinqubo yakamuva Ngakho-ke, umkhiqizo wangempela kufanele kuhlanganiswe nokuhlanzeka kwegumbi elimnyama, ukuze ukhethe ububanzi bomugqa omncane kanye nebanga lomugqa webhodi lesifunda elingakhiqizwa ngokuya ngesimo sangempela.

Umphumela wezimo ezikhulayo ekuxazululeni ubonakala kakhulu lapho ulayini umncane. Lapho umugqa ungaphezulu kwe-4.0mil / 4.0mil, izimo ezithuthukayo (isivinini, ukuminyana kwemithi engamanzi, ingcindezi, njll.) Umthelela awubonakali; lapho umugqa ungu-2.0mil / 2.0 / mil, ukuma nengcindezi yombhobho kudlala indima enkulu ekutheni ulayini ungathuthukiswa ngokujwayelekile. Ngalesi sikhathi, ijubane lentuthuko lingehla kakhulu. Ngesikhathi esifanayo, ukuhlushwa komuthi ketshezi kunomthelela ekubukeni kolayini. Isizathu esingenzeka ukuthi ingcindezi yombhobho omise okwe-fan inkulu, futhi umfutho usengafinyelela ezansi kwefilimu eyomile lapho isikhala somugqa sincane kakhulu Ukuthuthuka: ingcindezi yombhobho oyindilinga incane, ngakho-ke kunzima ukuthuthukisa umugqa omuhle. Ukuqondiswa kwelinye ipuleti kunomthelela omkhulu ekuxazululeni nasodongeni lwecala lefilimu eyomile.

Imishini yokuchayeka ehlukile inezinqumo ezihlukile. Njengamanje, umshini owodwa wokuchayeka upholile emoyeni, umthombo wokukhanya wendawo, omunye upholile ngamanzi nomthombo wokukhanya okhanyayo. Isixazululo sayo segama lingu-4mil. Kodwa-ke, ukuhlolwa kukhombisa ukuthi ingafinyelela ku-3.0mil / 3.0mil ngaphandle kokulungiswa okukhethekile noma ukusebenza; ingafinyelela ngisho ku-0.2mil / 0.2 / mil; lapho amandla ancishisiwe, angahlukaniswa nge-1.5mil / 1.5mil, kepha ukusebenza kufanele kuqaphele Ngaphezu kwalokho, awukho umehluko ocacile phakathi kokuxazululwa kobuso beMylar nengilazi ebusweni ekuhlolweni.

Ngokugqwala kwe-alikhali, kuhlale kunomphumela wamakhowe ngemuva kokuqothulwa, okuvame ukubonakala kuphela futhi kungabonakali. Isibonelo, uma ulayini mkhulu kune-4.0mil / 4.0mil, umphumela wamakhowe mncane.

Lapho ulayini ungu-2.0mil / 2.0mil, umthelela mkhulu kakhulu. Ifilimu eyomile yakha isimo samakhowe ngenxa yokuchichima komthofu nethini ngesikhathi sokuqothulwa, futhi ifilimu eyomile iminyene ngaphakathi, okwenza kube nzima kakhulu ukususa ifilimu. Izixazululo yilezi: 1. Sebenzisa i-pulse electroplating ukwenza umfaniswano wokumboza; 2. Sebenzisa ifilimu ewugqinsi eyomile, ifilimu ejwayelekile eyomile ingamakhonsoni angama-35-38, bese ifilimu eyomile iyisikhondlakhondla esingu-50-55, ebiza kakhulu. Le filimu eyomile ingaphansi kokufakwa kwe-asidi 3. Ukuchofoza okuphansi kwamanje. Kepha lezi zindlela aziphelele. Eqinisweni, kunzima ukuba nendlela ephelele.

Ngenxa yomphumela wamakhowe, ukuhlulwa kwemigqa emincane kuyinkinga kakhulu. Ngoba ukubola kwe-sodium hydroxide ukuhola nethini kuzobonakala kakhulu ku-2.0mil / 2.0mil, kungaxazululwa ngokuqina komthofu nethini nokunciphisa ukuhlushwa kwe-sodium hydroxide ngesikhathi se-electroplating.

Ku-alkaline etching, ububanzi bomugqa nesivinini kwehlukile kobujamo bomugqa ohlukile kanye nesivinini esihlukile. Uma ibhodi lesifunda lingenazo izidingo ezikhethekile kusayizi womugqa okhiqizwayo, ibhodi lesifunda elinosayizi wensimbi yethusi engu-0.25oz lizosetshenziselwa ukuyenza, noma ingxenye yebhesi yethusi engu-0.5oz izobekwa, ithusi elihlanganisiwe kufanele ibe mncane, ithini lomthofu lizokhuthelwa, njll. bonke badlala indima ekwenzeni imigqa emihle nge-alkaline etching, futhi umbhobho uzomiswa okwe-fan. Umbhobho oyindilinga uvame ukusetshenziswa kuphela yi-4.0mil / 4.0mil kuphela ongayithola.

Ngesikhathi sokufakwa kwe-asidi, okufanayo nokufakwa kwe-alkali ukuthi ububanzi bomugqa nejubane lokuma komugqa kwehlukile, kepha ngokujwayelekile, ngesikhathi sokufakwa kwe-asidi, ifilimu eyomile kulula ukuyiphula noma ukuklwebha ifilimu lesifi kanye nefilimu ebusweni ekudlulisweni nasezinqubeni zangaphambilini. Ngakho-ke, ukunakekelwa kufanele kuthathwe ngesikhathi sokukhiqizwa. Umphumela womugqa we-asidi .

Enqubeni yokukhiqiza, isivinini kanye namazinga okushisa wefilimu enamathela, inhlanzeko yepuleti ebusweni kanye nokuhlanzeka kwe-diazo ifilimu kunomthelela omkhulu ezingeni leziqu, elibaluleke kakhulu kumingcele ye-acid etching film coating and the flatness of plate ubuso; ngokufakwa kwe-alikhali, ukuhlanzeka kokuchayeka kubaluleke kakhulu.

Ngakho-ke, kubhekwa ukuthi imishini ejwayelekile ingaveza ama-3.0mil / 3.0mil (ebhekise kububanzi bomugqa wefilimu nezikhala) ngaphandle kokulungiswa okukhethekile; kodwa-ke, izinga leziqu liyathinteka ngobungoti nokusebenza ezingeni lezemvelo nabasebenzi. Ukugqwala kwe-alkali kufanelekile ukukhiqizwa kwamabhodi wesifunda angaphansi kuka-3.0mil / 3.0mil. Ngaphandle kokuthi ithusi elingeyona isisekelo lincane ngezinga elithile, umphumela wombhobho omise okwe-fan ngokusobala ungcono kunalowo wombhobho oyindilinga.