Umkhiqizi we-PCB Wokuncintisana

Lapho izinga lokushisa eliphezulu lebhodi lesifunda le-Tg likhuphukela endaweni ethile, i-substrate izoshintsha isuka "kwisimo sengilazi" ibe "isimo senjoloba", futhi izinga lokushisa ngalesi sikhathi libizwa ngokuthi izinga lokushisa lokuguqulwa kwengilazi (Tg) yepuleti. Ngamanye amazwi, i-Tg izinga lokushisa eliphakeme kakhulu (℃) lapho i-substrate ihlala iqinile. Okusho ukuthi, izinto ezivamile ze-PCB substrate ekushiseni okuphezulu azikhiqizi kuphela ukuthambisa, ukuguqulwa, ukuncibilika nezinye izenzakalo, kodwa futhi kubonisa ukwehla okubukhali kwezakhiwo zemishini nezikagesi (angicabangi ukuthi ufuna ukubona imikhiqizo yabo ivela kuleli cala. ).

Amapuleti e-General Tg angaphezu kuka-130 degrees, i-Tg ephakeme ngokuvamile ingaphezu kuka-170 degrees, kanti i-Tg ephakathi icishe ibe ngaphezu kuka-150 degrees.

Imvamisa, i-PCB ene-Tg≥170℃ ibizwa ngebhodi lesifunda le-Tg eliphakeme.

I-Tg ye-substrate iyanda, futhi ukumelana nokushisa, ukumelana nomswakama, ukumelana namakhemikhali, ukumelana nokuzinza kanye nezinye izici zebhodi lesifunda kuzothuthukiswa futhi kuthuthukiswe. Lapho inani le-TG liphakeme, kuzoba ngcono ukusebenza kokumelana nezinga lokushisa kwepuleti. Ikakhulukazi kwinqubo engenamthofu, i-TG ephezulu ivame ukusetshenziswa.

I-High Tg isho ukumelana nokushisa okuphezulu. Ngokuthuthuka okusheshayo kwemboni ye-elekthronikhi, ikakhulukazi imikhiqizo ye-elekthronikhi emelwe amakhompyutha, ekuthuthukiseni umsebenzi ophezulu, i-multilayer ephezulu, isidingo se-PCB substrate impahla ephakeme ukumelana nokushisa njengesiqinisekiso esibalulekile. Ukuvela nokuthuthukiswa kobuchwepheshe bokufaka ukuminyana okuphezulu okumelelwe i-SMT ne-CMT kwenza i-PCB incike kakhulu ekusekelweni kokumelana nokushisa okuphezulu kwe-substrate ngokwembobo encane, izintambo ezinhle kanye nohlobo oluncane.

Ngakho-ke, umehluko phakathi kwe-FR-4 evamile kanye ne-high-TG FR-4 ukuthi esimweni esishisayo, ikakhulukazi ngemva kwe-hygroscopic kanye nokufudumeza, amandla omshini, ukuqina kobukhulu, ukunamathela, ukumuncwa kwamanzi, ukubola okushisayo, ukunwetshwa kokushisa nezinye izimo. izinto zokwakha zihlukile. Imikhiqizo ye-High Tg ngokusobala ingcono kunezinto ezijwayelekile ze-PCB substrate. Eminyakeni yamuva, inani lamakhasimende adinga ibhodi lesifunda le-Tg eliphezulu liye landa unyaka nonyaka.