(Ƙarfe na CeramicWanda ya samarwaWintrusetk)
Ceramic karafaita ce dabarar ajiye rufin ƙarfe mai mannewa sosai akan saman yumbu. Wannan mataki ne mai mahimmanci tunda tukwane ba su da tushe don siyarwa. Ƙarfe ɗin da aka yi da ƙarfe ya sa su zama masu iya siyarwa, yana samar da tushen mahimmanci don ƙirƙirar haɗin yumbu-zuwa-karfe mai ƙarfi.
Da ke ƙasa akwai bayyani na hanyoyin farko guda huɗu da ake amfani da su a cikin masana'antar a yau.
1. Molybdenum-Manganese (Mo-Mn)Hanyar: Matsayin Masana'antu
TheMo-Mntsari shine mafi akai-akai amfani da ingantaccen fasahar sarrafa yumbura. Tun daga tsakiyar karni na ashirin, ya kasance daidaitaccen hanya don samar da babban abin dogaro a cikin kayan lantarki da aikace-aikacen sararin samaniya.
Ƙa'idar Tsari:shirya slurry na refractory molybdenum foda, manganese foda, da activators (misali Al2O3, SiO2, da CaO) a cikin kwayoyin dauri. Ana amfani da wannan slurry a saman yumbu kuma ana yin shi a yanayin zafi mai yawa (1300-1600 ° C) a cikin yanayin hydrogen mai laushi (raɓan raɓa = + 30 ° C).
Amfani: Yana ba da ƙarfin rufewa mai girma (kai har zuwa 60.2 ± 7.7 MPa tare da hanyar da aka kunna) da ingantaccen matsewar injin (tare da ƙarancin yatsa kamar 2.3 × 10⁻¹¹ Pa·m³/s). Tsarin yana ba da damar sake zagayowar sake aiki da yawa da fa'idodi daga faffadan taga tsari mai gafartawa.
Iyakoki:Babban yanayin zafi na iya canza yanayin yumbu. Tsarin yana buƙatar manyan kayan wutan lantarki na hydrogen, wanda ke haifar da lokaci mai tsawo. Bugu da ƙari kuma, bai dace da yumbun da ba oxide ba kamar AlN a cikin rashin tsarin pre-oxidation.
2. Hanyar harbe-harbe: Kunna Wiring Multilayer
Hanyar haɗa harbe-harbe tana haɗar da ƙarfe kai tsaye cikin tsarin sintering yumbu. Babban jigo shine "haɗin gwiwar yumbu mai kore," wanda ya haɗa da buga allo na manna ƙarfe mai jujjuyawa (kamar tungsten, molybdenum, ko molybdenum-manganese) akan zanen yumbu mara wuta (kore). Ana haɗa waɗannan zanen gadon kuma a haɗa su tare don kammala haɓakar yumbu da ƙarfe na ciki a mataki ɗaya.
3. Copper Direct Bonded (DBC)An Inganta shi don Watsewar Wuta
Copper Direct Bonded (DBC)An haɓaka shi a cikin 1970s kuma GE ne ya fara sayar da shi a Amurka. Yanzu ya zama daidaitaccen fasaha don manyan kayan aikin IGBT masu ƙarfi da abubuwan rarraba zafi na LED. Wannan tsari ya haɗa kai tsaye haɗa foil ɗin tagulla zuwa yumbura mai yumbu, wanda ke haifar da tsari mai tsananin zafi da rufin lantarki.
4. Active Metal Brazing (AMB): Juyin Juya Halin Mataki Daya
Ƙarfe mai Active Brazing (AMB) wata muhimmiyar ƙira ce wacce ke haɗa ƙarfe da brazing cikin tsari guda ɗaya mai sauƙi. Ana samun wannan ta hanyar gabatar da abubuwa masu aiki, kamar Ti, Zr, Nb, ko V, kai tsaye zuwa ƙarfen filler ɗin brazing. A yanayin zafi mai yawa, waɗannan abubuwan suna amsawa da yumbu don samar da wani nau'in amsawa tare da tsarin haɗin ƙarfe. Misalai sun haɗa da TiO, TiN, da Cu3Ti3O. Wannan Layer yana ba da damar ƙarfe mai jujjuyawar brazing don jiƙa saman yumbura kai tsaye.
Halayen tsari:
Sauƙaƙe Gudun Aiki: Yana kawar da buƙatar wani mataki na daban na riga-kafi.
Ƙananan Yanayin Tsara: Brazing yana faruwa a ƙananan yanayin zafi (800-950°C).
Yanayi Mai Sarrafa: Yi a cikin sarari ko tsaftataccen yanayi mara kyau don hana iskar oxygen da abubuwa masu aiki.
Material Versatility: Ya dace da yumbu kamar Al2O3, AlN, da Si3N4.
