Ukushintsha kwezinga lokushisa okusebenzayo kungaba nomthelela omkhulu ekusebenzeni, ukuthembeka, impilo yonke kanye nekhwalithi yemikhiqizo. Izinga lokushisa liyakhuphuka liphumela ekukhuleni kwezinto, nokho-ke, izinto ezingaphansi kwe-PCB ezenziwe ngazo zinama-coefficients ahlukene okunweba okushisayo, lokhu kubangela ukucindezeleka kwemishini okungadala imifantu emincane engase ingabonakali ngesikhathi sokuhlolwa kukagesi okwenziwa ekupheleni kokukhiqiza.
Ngenxa yenqubomgomo ye-RoHS eyakhishwa ngo-2002 kwakudingeka ama-alloys angenawo umthofu ukuze ahlanganiswe. Kodwa-ke, ukususa umthofu kuholela ngokuqondile ekukhuphukeni kwezinga lokushisa elincibilikayo, amabhodi esekethe aphrintiwe ngakho-ke angaphansi kwamazinga okushisa aphezulu ngesikhathi se-solder (okuhlanganisa ukugeleza kabusha kanye namagagasi). Ngokuya ngenqubo ekhethiwe yokugeleza kabusha (eyodwa, ephindwe kabili…), kuyadingeka ukusebenzisa i-PCB enezici ezifanele zomshini, ikakhulukazi ene-Tg efanelekile.
Yini i-Tg?
I-Tg (izinga lokushisa lokushintsha kwengilazi) inani lokushisa eliqinisekisa ukuzinza kwemishini ye-PCB phakathi nesikhathi sokusebenza se-PCB, ibhekisela ekushiseni okubalulekile lapho i-substrate incibilika ukusuka oketshezini oluqinile ukuya oketshezini oluyinjoloba, esilibize ngokuthi iphoyinti le-Tg, noma iphoyinti lokuncibilika ukuze kube lula ukuliqonda. Lapho iphoyinti le-Tg liphakeme, imfuneko yokushisa yebhodi izoba phezulu lapho i-laminated, futhi ibhodi le-Tg eliphakeme ngemva kwe-laminated lizoba nzima futhi libe brittle, okuzuzisa inqubo elandelayo njengokubhola ngomshini (uma ikhona) nokugcina izakhiwo ezingcono zikagesi ngesikhathi sokusetshenziswa.
Izinga lokushisa lokushintsha kwengilazi linzima ukukalwa ngokunembile ngokucabangela izici eziningi, kanye nento ngayinye inesakhiwo sayo samangqamuzana, ngakho-ke, izinto ezihlukene zinezinga lokushisa elihlukile lokushintsha kwengilazi, futhi izinto ezimbili ezihlukene zingase zibe nenani elifanayo le-Tg noma zinezici ezihlukile, lokhu kusenza sikwazi ukukhetha enye indlela lapho impahla edingekayo iphelile.
Izici ze-High Tg materials
l Ukuzinza okungcono kwe-thermal
l Ukumelana okuhle nomswakama
l I-coefficient ephansi yokwandisa okushisayo
l Ukumelana okuhle kwamakhemikhali kunento ephansi ye-Tg
l Inani eliphakeme lokumelana nokucindezeleka okushisayo
l Ukuthembeka okuhle kakhulu
Izinzuzo ze-High Tg PCB
Ngokuvamile, i-PCB FR4-Tg evamile ingama-degree angu-130-140, i-Tg ephakathi ingaphezu kuka-150-160 degrees, futhi i-Tg ephakeme ingaphezu kwama-degree angu-170, i-High FR4-Tg izomelana kangcono nomshini namakhemikhali ekushiseni nasekuswameni kune-FR4 evamile, nazi ezinye izinzuzo ze-Tg PCB ephezulu ukuze uyibuyekeze:
1. Ukuzinza okuphezulu: Izothuthukisa ngokuzenzakalelayo ukumelana nokushisa, ukumelana namakhemikhali, ukumelana nomswakama, kanye nokuzinza kwedivayisi uma ikhulisa i-Tg ye-PCB substrate.
2. Ukumelana nomklamo wokuminyana kwamandla aphezulu: Uma idivayisi inokuminyana kwamandla aphezulu kanye nevelu yekhalori ephezulu ngokufanele, i-Tg PCB ephezulu izoba yisixazululo esihle sokuphatha ukushisa.
3. Amabhodi esekethe amakhulu aphrintiwe angasetshenziswa ukushintsha umklamo namandla wezidingo zemishini ngenkathi kunciphisa ukukhiqizwa kokushisa kwamabhodi ajwayelekile, futhi i-Tg PCBS ephezulu ingasetshenziswa.
4. Ukukhetha okufanelekile kwe-multi-layer kanye ne-HDI PCB: Ngenxa yokuthi izendlalelo eziningi kanye ne-HDI PCB ziminyene kakhulu futhi ziminyene, kuzophumela ezingeni eliphezulu lokukhipha ukushisa. Ngakho-ke, ama-TG PCB aphezulu avame ukusetshenziswa kuma-PCB anezendlalelo eziningi kanye nama-HDI ukuze kuqinisekiswe ukwethembeka kokukhiqizwa kwe-PCB.
Uyidinga nini i-High Tg PCB?
Ngokuvamile ukuze kuqinisekiswe ukusebenza kahle kwe-PCB, izinga lokushisa eliphezulu lokusebenza kwebhodi lesifunda kufanele libe ngama-degree angama-20 ngaphansi kwezinga lokushisa lokushintsha kwengilazi. Isibonelo, uma inani le-Tg lezinto ezibonakalayo lingama-degree angu-150, izinga lokushisa langempela lokusebenza kwaleli bhodi lesifunda akufanele libe ngaphezu kwama-degree angu-130. Ngakho-ke, uyidinga nini i-Tg PCB ephezulu?
1. Uma uhlelo lwakho lokusebenza lokugcina ludinga ukuthwala umthwalo oshisayo omkhulu kuno-25 degrees centigrade ngaphansi kwe-Tg, khona-ke i-Tg PCB ephezulu iyisinqumo esingcono kakhulu sezidingo zakho.
2. Ukuqinisekisa ukuphepha lapho imikhiqizo yakho idinga izinga lokushisa elilingana noma elikhulu kuno-130 degrees, i-Tg PCB ephezulu ilungele uhlelo lwakho lokusebenza.
3. Uma ngabe uhlelo lwakho lokusebenza ludinga i-PCB enezingqimba eziningi ukuze ihlangabezane nezidingo zakho, khona-ke okokusebenza okuphezulu kwe-Tg kuhle ku-PCB.
Izinhlelo zokusebenza ezidinga i-Tg PCB ephezulu
l Isango
l I-Inverter
l I-Antenna
l I-Wifi Booster
l Ukuthuthukiswa Kwezinhlelo Ezishumekiwe
l Amasistimu Ekhompyutha Ashumekiwe
l Ac Power Supplies
l Idivayisi ye-RF
l Imboni ye-LED
I-Best Tech inolwazi olucebile ekukhiqizeni i-High Tg PCB, singenza ama-PCB ukusuka ku-Tg170 ukuya ku-Tg260 ephezulu, okwamanje, uma uhlelo lwakho lokusebenza ludinga ukusebenzisa ngaphansi kwezinga lokushisa eliphakeme kakhulu njengo-800C, ungasebenzisa kangconoIbhodi le-Ceramic engadlula -55~880C.