Ukuqhathaniswa kwe-Ceramic PCB Material: Alumina, AlN, Si₃N₄, SiC, BeO

Isingeniso

Ama-substrates e-Ceramic abaluleke kakhulu ku-elekthronikhi yesimanje lapho ukuphathwa okushisayo, ukuzinza kwe-dimensional, nokuthembeka kubaluleke kakhulu. Kumasistimu e-LED enamandla amakhulu, izishintshi zezimoto, ama-aerospace avionics, nama-amplifiers e-RF, amabhodi endabuko e-FR-4 awakwazi ukuqeda ukushisa ngokwanele noma ukugcina ukusebenza ngaphansi kwezimo ezimbi kakhulu.

Lokhu kuqhathaniswa kwezinto ze-PCB ze-ceramic kuhlola izinto ezinhlanu eziyinhloko: i-aluminium oxide (Al₂O₃), i-aluminium nitride (AlN), i-silicon nitride (Si₃N₄), i-silicon carbide (SiC), kanye ne -beryllium oxide (BeO). Izinto ngazinye zinikeza izinzuzo ezihlukile ekuqhutshweni kokushisa, i-coefficient of thermal expansion (CTE), amandla omshini, kanye nezindleko.

Ukuthi okubalulekile kwakho ukuzuza ukuncishiswa kokushisa okuphezulu, ukufanisa idivayisi ye-silicon ye-CTE ye-flip-chip assemblies, noma ukulinganisa ukusebenza ngokumelene nezingqinamba zebhajethi, lo mhlahlandlela uhlinzeka ngedatha yobuchwepheshe kanye nemininingwane yohlelo lokusebenza ukwazisa ukukhetha kwakho kokubalulekile.

Uhlolojikelele olusheshayo: Izinto ezi-5 eziphezulu ze-Ceramic PCB ngokubuka nje

Ithebula elilandelayo lifingqa izici ezibalulekile ze-ceramic PCB material ngayinye ukuze kube lula ukuqhathanisa ngokushesha:

Leli thebula lokuqhathanisa le-ceramic PCB lembula ukuthi ayikho into eyodwa ebusa kuwo wonke amapharamitha. I-Aluminium oxide isebenza njengesisekelo somnotho, kuyilapho i-aluminium nitride ne-beryllium oxide iletha ukusebenza okushisayo okuphakeme ngezindleko eziphakeme.

Ukuhlaziywa okuningiliziwe kwe-Ceramic PCB Material ngayinye

1. I-Aluminium oxide (Al₂O₃): Izinga Lemboni

Uhlolojikelele Lwempahla Nezakhiwo Ezibalulekile

I-Aluminium oxide imelela into esetshenziswa kabanzi ye-ceramic substrate ngenxa yebhalansi yayo evumayo yokusebenza, ukwenziwa kwayo, kanye nezindleko. Ngokwenziwa kokushisa okusuka ku-20 kuye ku-30 ​​W/m·K, ama-substrates e-Al₂O₃ ahlakaza kahle ukushisa ezinhlelweni zamandla amaphakathi lapho i-silicon noma i-FR-4 izohluleka khona.

Izinto ezisetshenziswayo zibonisa ukufakwa kukagesi okuhle kakhulu okunamandla e-dielectric angaphezu kuka-10 kV/mm nokumelana nevolumu ngaphezu kuka-10¹⁴ Ω·cm. I-coefficient yayo yokwandisa okushisayo (cishe u-6.5–7.5 ppm/K) ifanelana ngokunengqondo nezinto ezivamile ze-semiconductor, inciphisa ukucindezeleka okushisayo kumajoyinti e-solder ngesikhathi sokuhamba ngebhayisikili.

Izimpawu Zokukhiqiza Nokucubungula

Ukukhiqiza ama-PCB e-aluminium oxide kuhilela amasu amiswe kahle afaka ukufakwa kwe-tape cast, ukuphrinta kwesikrini kokunamathisela kwe-metalization, kanye nokudubula ngokubambisana emazingeni okushisa acishe abe ngu-1600°C. Amandla e-Flexural ngokuvamile afinyelela ku-300–400 MPa, enikeza ukuqina okwanele kwemishini yezinqubo zokuhlanganisa ezijwayelekile.

Uchungechunge lokuhlinzeka oluvuthiwe nokucubungula okuqondile kunomthelela enzuzweni yezindleko zakho. Izinhlelo zokusebenza ezijwayelekile zifaka amalungu afanayo okukhanyisa e-LED avamile, iziguquli zamandla aphansi ukuya kwamaphakathi, namasekhethi e-hybrid microelectronic lapho ukusebenza okushisayo okudlulele kungadingeki.

Ukulinganiselwa Kokusebenza

Umkhawulo oyinhloko we-Al₂O₃ kulokhu kuqhathaniswa kwe-ceramic PCB ukuqhutshwa kwayo okushisayo okunesizotha, okuba okunganele kumadivayisi agcwele amandla aphezulu noma izinhlelo zokusebenza ezingaphezu kuka-5–10 W/cm² ukuminyana kwamandla.

2. I-Aluminium Nitride (i-AlN): Umpetha Wokuziphatha Okushisayo Okuphezulu

Ukusebenza Okuphezulu Okushisayo Nokagesi

I-Aluminium nitride isivele njengento ethandwayo yezinhlelo zokusebenza ezidinga kokubili ukuqhutshwa kwe-thermal okuhle kakhulu kanye nokufakwa kukagesi. Ngamanani e-thermal conductivity asukela ku-170 ukuya ku-230 W/m·K, ama-substrates e-AlN ahlinzeka cishe ngohlelo lobukhulu bokukhipha ukushisa okungcono kune-aluminium oxide kuyilapho igcina izakhiwo ze-dielectric eziphezulu.

I-coefficient yendawo yokwandisa okushisayo (cishe u-4.5 ppm/K) ihambisana eduze ne-silicon (2.6 ppm/K), okwenza i-AlN ifaneleke ikakhulukazi ukuhlanganiswa kwe-flip-chip, izinhlelo zokusebenza ezinamathisela i-die ngqo, namamojula wamandla athembeke kakhulu lapho ukungafani kwe-CTE kungaholela ekuhlulekeni ngaphambi kwesikhathi.

Izici zikagesi kanye nezicelo ze-RF

Ukufakwa kukagesi kuhlala kukuhle kakhulu, nokungaguquki kwe-dielectric cishe ku-8.8 kanye ne-tangent yokulahlekelwa ngaphansi kuka-0.001 kumafrikhwensi e-RF. Le nhlanganisela yenza i-aluminium nitride isebenze kahle kukho kokubili amandla kagesi kanye nezinhlelo zokusebenza ezisebenza ngamaza aphezulu.

Ukucatshangelwa Kwezokukhiqiza

Ukucubungula i-aluminiyamu nitride kudinga ukulawula ngokucophelela isimo sezulu esishisayo namazinga okushisa (imvamisa engu-1700–1900°C) ukuze kuzuzwe ukusebenza kahle okushisayo. Izinto ezibonakalayo zizwela umswakama ngesikhathi sokudubula, futhi izinqubo ze-metalization kufanele zihambisane namakhemikhali ayo.

Naphezu kwalezi zinkimbinkimbi zokukhiqiza, i-AlN isikwazi ukuhwebelana ngokukhiqiza umthamo wamaphakeji e-LED enamandla amakhulu, izikhulisamandla zamandla e-RF, ama-laser diode submounts, namandla kagesi ezimoto. Okucatshangelwayo okuyinhloko yi-premium yayo yezindleko ezimaphakathi ngaphezu kwe-Al₂O₃ namandla emishini aphansi uma kuqhathaniswa ne-silicon nitride.

3. I-Silicon Nitride (Si₃N₄): I-Superior Mechanical Reliability

Amandla Angavamile kanye Nokumelana Nokushaqeka Kwe-Thermal

I-Silicon nitride iyazihlukanisa ngamandla emishini akhethekile kanye nokumelana nokushaqeka okushisayo, okuyenza ilungele izinhlelo zokusebenza ezingaphansi kokuhamba ngebhayisikili okushisayo noma ingcindezi yokusebenza. Izinto ezisetshenziswayo zithola amandla okuguquguquka angaphezu kuka-700–900 MPa, cishe okuphindwe kabili kwawe-aluminium oxide, kuyilapho kugcinwa ukuguquguquka kwe-thermal ebangeni elingu-70–90 W/m·K.

I-coefficient yokunwetshwa okushisayo kwe-Si₃N₄ (cishe u-3.2 ppm/K) ihlinzeka ngokuhambisana okuhle kakhulu namadivayisi e-silicon, kunciphisa ingcindezi ekuxhumaneni kwe-die attach. Lokhu kufanisa kwe-CTE, kuhlanganiswe nokuqina okuphezulu kokuphuka, kwenza ama-silicon nitride substrates akwazi ukusinda ohambweni olushisayo oluphindaphindiwe ukusuka -40°C kuya ku-+150°C noma ngaphezulu ngaphandle kokuqhekeka.

Inqubo Yokukhiqiza kanye Nezinzuzo Zomklamo

Ukukhiqiza ama-PCB e-silicon nitride ngokuvamile kusebenzisa ukucindezela okushisayo noma ukucindezela kwegesi ukuze kuzuzwe ama-microstructures aminyene anezakhiwo ezifanele. Amandla aphezulu ezinto ezibonakalayo avumela imiklamo ye-substrate emincane, enciphisa ukumelana nokushisa ngenkathi igcina ubuqotho besakhiwo.

Izinqubo ze-Metallization zisungulwe kahle, zisebenzisa amasistimu asekelwe ku-tungsten noma e-molybdenum angamelana nokucubungula okushisayo okuqinile. Kulesi siqhathaniso se-ceramic PCB ye-ceramic, i-silicon nitride isebenza njengenketho egxile ekuthembekeni yama-inverter ama-automotive traction, ama-industrial motor drives, kanye nezinhlelo zamandla ze-avionics.

4. I-Silicon Carbide (SiC): Ingcweti Yezinga Lokushisa Eliphezulu

Izakhiwo Eziyingqayizivele Nemikhawulo Eyisisekelo

I-Silicon carbide inikeza i-thermal conductivity ehlukile (120–200 W/m·K) futhi ingasebenza emazingeni okushisa angaphezu kuka-600°C, kodwa inikeza umkhawulo obalulekile: impahla ngokwayo ihambisa ugesi kunokuba igqume. Lesi sici sihlukanisa i-SiC kwezinye izinto kulesi siqhathaniso se-ceramic PCB.

Ukuze isebenze njenge-substrate ye-PCB, i-silicon carbide idinga izendlalelo ezengeziwe ze-dielectric noma izakhiwo ezikhethekile ukuhlinzeka ngokuhlukaniswa kukagesi phakathi kwemikhondo yesekethe. Izindlela ezijwayelekile zifaka ukufaka i-silicon dioxide noma izendlalelo ze-aluminium nitride insulation kusisekelo se-SiC, ukwakha isakhiwo esiyinhlanganisela.

Izimo Zohlelo Lokusebenza kanye Nenkimbinkimbi Yokukhiqiza

I-thermal conductivity ephezulu, ukunwetshwa kokushisa okuphansi (cishe u-4.0 ppm/K), kanye nokuzinza okwedlulele kwezinga lokushisa kuyenza ithandeke ezinhlelweni ezikhethekile ezifana nezinzwa zethempelesha ephezulu, ukulungiswa kokuhlolwa kwedivayisi yamandla, nezinhlelo ezithile ze-aerospace lapho amazinga okushisa okusebenza edlula umkhawulo wezinto ezijwayelekile zobumba.

Kodwa-ke, inkimbinkimbi eyengeziwe yokuhlanganiswa kongqimba bokufakelwa, kuhlanganiswe nezindleko zemvelo ze-SiC, kunciphisa ukusetshenziswa kwayo kuzinhlelo zokusebenza ze-niche. Ukucatshangelwa kokukhiqiza kufaka phakathi ubunjiniyela besixhumi esibonakalayo esicophelelayo phakathi kwe-SiC nezendlalelo zokufakelwa, i-metallization ekhethekile ehambisana nesakhiwo esiyinhlanganisela, nokulawulwa kwekhwalithi okuqinile ukuze kuqinisekiswe ubuqotho be-dielectric.

5. I-Beryllium Oxide (BeO): Ukusebenza Kokugcina Okunezingqinamba Ezibucayi

Ukusebenza Okuvelele Okushisayo

I-Berryllium oxide imele isiqongo se-thermal conductivity phakathi kwezinto ze-ceramic PCB, ifinyelela amanani ukusuka ku-250 kuya ku-300 W/m·K kuyilapho igcina ukufakwa kukagesi okuhle kakhulu. Le nhlanganisela yezakhiwo ayifani nanoma iyiphi enye impahla ye-ceramic substrate kulesi siqhathaniso se-ceramic PCB.

I-CTE yezinto ezibonakalayo (cishe u-7.5 ppm/K) iqhathaniswa ne-aluminium oxide kodwa inamandla amakhulu kakhulu okukhipha ukushisa. Kuzinhlelo zokusebenza ezidinga ukusebenza okushisayo okuphezulu, i-BeO ingakwazi ukunika amandla ukuminyana kwamandla kanye nemiklamo eshisayo engenakwenzeka ngezinye izinto.

Ubuthi Obubalulekile Nokukhathazeka Ngokuphepha

Kodwa-ke, i-beryllium oxide iphethe ukukhathazeka okukhulu kobuthi okuvimbela kakhulu ukusetshenziswa kwayo. Uthuli lwe-beryllium olukhiqizwa ngesikhathi somshini, ukuphatha, noma ukuphuka kwe-substrate kubangela izingozi ezinkulu zempilo, okuhlanganisa nesifo se-beryllium esingamahlalakhona, isimo samaphaphu esingase sibe yingozi enkulu.

Imithetho eqinile yokuphepha emsebenzini ilawula ukwenziwa nokuphathwa kwe-BeO, edinga izindawo ezikhethekile, izinto zokuvikela, nezinqubo zokulahla. Ngenxa yalezi zingqinamba zokuphepha nokulawula, ama-substrates e-beryllium oxide alinganiselwe ngokuyinhloko kwezempi, i-aerospace, kanye nezinhlelo ezithile zokuxhumana ezisebenza kahle kakhulu.

Ezinye Izindlela Ezisebenzayo

Ezinhlelweni eziningi zezentengiselwano phakathi kwalesi siqhathaniso se-ceramic PCB, i-aluminium nitride isuse indawo enkulu i-beryllium oxide, inikela ngo-70-80% wokusebenza okushisayo kwe-BeO ngaphandle kokukhathazeka ngobuthi, okwenza i-AlN ibe yinketho ekhethwayo yezidingo ezisezingeni eliphezulu ze-thermal-conductivity.

Ukuqhathanisa Ukusebenza: Ukuhlaziywa Kwe-Thermal Conductivity

1. I-Thermal Conductivity Hierarchy

I-Thermal conductivity imelela umehluko obaluleke kakhulu kulokhu kuqhathaniswa kwe-ceramic PCB, njengoba inquma ngokuqondile amandla okukhipha ukushisa kanye nokuminyana kwamandla okuzinzile okukhulu. Isigaba sokusebenza silandela lolu hlelo:

• I-Beryllium oxide – 250–300 W/m·K iletha ukukhishwa kokushisa okuphezulu kodwa ngemikhawulo yobuthi obunzima
• I-Aluminium nitride – 170–230 W/m·K inikeza ukusebenza okuhle kakhulu kokushisa ngaphandle kokukhathazeka ngokuphepha
• I-silicon carbide – 120–200 W/m·K inikeza ukuqhutshwa okuphezulu kodwa kudinga izendlalelo zokwahlukanisa
• I-silicon nitride – 70–90 W/m·K ibhalansi ukusebenza okushisayo namandla okusebenza aphakeme
• Aluminium oxide – 20–30 W/m·K isebenza njengesisekelo esingokomnotho sezinhlelo zokusebenza zamandla amaphakathi

2. Imihlahlandlela Yokusebenzisa Ukuminyana kwamandla

Kuzinhlelo zokusebenza ezidinga ukuminyana kwamandla angaphezu kuka-15 W/cm², i-aluminium nitride noma i-beryllium oxide iba kudingekile ukuze kugcinwe amazinga okushisa okuhlangana ngaphakathi kwemikhawulo eyamukelekayo. I-Silicon nitride inikezela ngezinhlelo zokusebenza kububanzi obungu-5–15 W/cm² lapho ukwethembeka kwayo okuphezulu kwengeza inani elingaphezu kokusebenza okuhlanzekile okushisayo.

I-aluminium oxide ihlala yanele ukuminyana kwamandla ngaphansi kuka-5 W/cm² noma lapho isikhala sedivayisi sivumela ukusabalala okusebenzayo kokushisa. Le mikhawulo ihlinzeka ngesiqondiso esisebenzayo sokukhethwa kwezinto ezisekelwe ezidingweni ezishisayo.

3. I-Coefficient of Thermal Expansion Matching

Ngaphandle kokusebenza okushisayo okuphelele, ukufaniswa kwe-CTE namadivayisi we-silicon kuthinta kakhulu ukuthembeka kwesikhathi eside. I-Aluminium nitride (4.5 ppm/K) ne-silicon nitride (3.2 ppm/K) ihlinzeka ngokufana kwe-CTE ephakeme ne-silicon (2.6 ppm/K) uma kuqhathaniswa ne-aluminium oxide (6.5–7.5 ppm/K) noma i-beryllium oxide (7.5 ppm/K).

Lokhu kufana okuseduze kunciphisa ukunqwabelana kwengcindezi ye-thermomechanical ngesikhathi sokuhamba ngebhayisikili, ukucatshangelwa okubalulekile kwezinhlelo zokusebenza zezimoto nezezimboni ngemijikelezo yokushisa engu-50,000 noma ngaphezulu ngesikhathi sokuphila komkhiqizo. Amandla akhethekile wemishini ye-Silicon nitride kanye nokumelana nokushaqeka okushisayo kuhambisana nokuguquguquka kwayo okushisayo okumaphakathi, okuvumela ukusebenza okuthembekile ngezimo ezishisayo ezishisayo.

Izindleko, Ukutholakala, kanye Nokucatshangelwa Kokukhiqiza

1. Isakhiwo Sezindleko Zezinto ezibonakalayo

Izindleko zezinto ezibonakalayo nobunkimbinkimbi bokukhiqiza ziyahlukahluka kakhulu kuzo zonke izinketho kulesi siqhathaniso se-ceramic PCB. I-Aluminium oxide imele inketho engabizi kakhulu, enamaketanga okunikezela amisiwe, abathengisi abaningi abaqeqeshiwe, nezinqubo zokukhiqiza eziqondile ezivumela ukukhiqizwa kwevolumu ephezulu ngamanani ancintisanayo.

I-Aluminium nitride ne-silicon nitride zithatha ibanga lezindleko eziphakeme eziphakathi, ngokuvamile ezinentengo ephindwe kabili noma kane kunezindleko zama-substrates e-aluminium oxide alinganayo. Le phrimiyamu ibonisa izinqubo ze-sintering eziyinselele, izimfuneko eziqinile zokulawula inqubo, kanye nezisekelo ezilinganiselwe zabahlinzeki.

2. Izinto Ezikhethekile kanye Nochungechunge Lokuhlinzeka

Ama-Silicon carbide substrates anezendlalelo ezihlanganisiwe zokufaka ayala amanani entengo ngenxa yezindleko zempahla kanye nokucubungula okwengeziwe okudingekayo ekufakweni kongqimba lwe-dielectric nobunjiniyela bokusebenza. Ukutholakala okukhawulelwe komphakeli kuphinda kuvimbele ukunikezwa, okwenza i-SiC ifaneleke ngokuyinhloko izicelo ezikhethekile.

I-Beryllium oxide ibhekene nezindleko ezinzima kakhulu nezingqinamba zokutholakala. Ngaphandle kwezindleko zezinto ezibonakalayo, izindawo zokukhiqiza ezikhethekile, izimiso eziqinile zokuphepha, kanye nesisekelo esilinganiselwe sabahlinzeki kuphumela ezikhathini zokuhola ezilinganiswa ngezinyanga kanye nentengo engase ibe ngaphezu kokuphindwe kashumi kwezindleko ze-aluminium oxide.

3. Umthelela Wesivuno Sokukhiqiza

Ukucatshangelwa kwesivuno sokukhiqiza nakho kunomthelela ezindlekweni ezisebenzayo. I-Aluminium oxide ithola isivuno esiphezulu kakhulu ngenxa yezinqubo ezivuthiwe, kuyilapho i-aluminium nitride ne-silicon nitride idinga ukulawulwa kwenqubo ngokucophelela. Izakhiwo eziyinhlanganisela ye-silicon carbide kanye nokucutshungulwa kwe-beryllium oxide kuveza izinselelo ezinkulu zesivuno, okunikela enkokhelweni yazo yezindleko.

Ukucatshangelwa Kokuphepha, Imvelo, kanye Nokulawula

1. I-Berryllium Oxide Toxicity Concerts

Izici zemvelo nezokuphepha zimelela imibandela yesinqumo esibalulekile kulokhu kuqhathaniswa kwe-ceramic PCB, ikakhulukazi i-beryllium oxide. Ubuthi bezinhlanganisela ze-beryllium budala izingozi ezinkulu zempilo emsebenzini ngesikhathi sokukhiqiza, ukwenziwa kwemishini, kanye nokuphathwa kwama-substrates e-BeO.

Ukuhogela uthuli lwe-beryllium kungabangela i-pneumonitis eyingozi kanye nesifo se-beryllium esingamahlalakhona, okuholela ekuwohlokeni okuqhubekayo kwamaphaphu. Ngenxa yalokho, iziphathimandla eziningi zibeka imithetho eqinile mayelana nokusetshenziswa kwe-BeO, edinga izinhlelo ezikhethekile zokungenisa umoya, izinto zokuzivikela, izinhlelo zokuqapha zezokwelapha, kanye nezinqubo ezilawulwayo zokulahla.

2. Enye Iphrofayela Yokuphepha Kwezinto Ezibalulekile

Lezi zidingo zokuphepha zidala ukukhathazeka ngesikweletu kanye nobunzima bokusebenza obuqhube izicelo eziningi zezentengiselwano zibheke ku-aluminum nitride njengendlela ephephile enokuqhathaniswa nokusebenza okushisayo. Izinhlangano ezicabangela i-beryllium oxide kufanele zihlole ngokucophelela ukuthi ingabe ukusebenza okushisayo okwandayo kuwufanele yini umthwalo wokulawula.

Izinto ezisele kulesi siqhathaniso se-ceramic PCB yethula ukukhathazeka okuncane kwezempilo noma kwemvelo okungaphezu kwezinyathelo ezijwayelekile zokuphatha nge-ceramic. I-Aluminium oxide, i-aluminium nitride, i-silicon nitride, ne-silicon carbide azethuli izinkinga ezibalulekile zobuthi, nakuba izinyathelo ezijwayelekile zokulawula uthuli phakathi nomshini zihlala zifanelekile.

3. Umthelela Nokulahlwa Kwemvelo

Wonke ama-substrates e-ceramic adinga izinqubo zokushisa eziphezulu ze-sintering ezidla amandla amakhulu, ukucatshangelwa kwezinhlangano ezinemigomo yokusimama kwemvelo. Izinketho zokulahla kokuphela kwempilo ziyahlukahluka ngokuya ngezinto.

Ama-substrates e-aluminium oxide ngokuvamile angagaywa kabusha noma alahlwe ngemifudlana evamile yemfucuza yezimboni. I-Aluminium nitride, i-silicon nitride, ne-silicon carbide zingadinga ukulahlwa okukhethekile ngenxa yemvelo yazo ephikisayo kodwa azivezi ukukhathazeka kwemfucuza eyingozi. I-Berryllium oxide idinga ukulahlwa kukadoti oyingozi okulawulwayo, okwengeza ezindlekweni zomjikelezo wokuphila.

Izincomo zesimo sohlelo lokusebenza

1. I-High-Power LED Lighting Systems

Ngokukhanya okujwayelekile kwe-LED okudayiswayo lapho izindleko zisebenza kahle, ama-substrates e-aluminium oxide ahlinzeka ngokusebenza okwanele okushisayo ngezindleko ezifanele. Izinhlelo zokusebenza ezidinga ukuminyana okuphezulu kokuphuma kokukhanya zizuza ezintweni ezihlukene.

Amalambu ezimoto, ukukhanya kwenkundla, kanye nezakhiwo zemboni ye-high-bay kuzuza ku-aluminium nitride's superior conductivity, okunika amandla izici zefomu elincane kanye nokwelulwa kwesikhathi sempilo ye-LED ngokusebenzisa amazinga okushisa aphansi e-junction. Inketho yezinto ezibonakalayo ithinta ngokuqondile kokubili ukusebenza nezindleko eziphelele zobunikazi.

2. Amandla kagesi kanye nama-Motor Drives

Ama-inverter ama-auto traction kanye nama-industrial motor drives adinga izinto ezisinda emashumini ezinkulungwane zemijikelezo yokushisa phakathi kwamazinga okushisa abanzi. Inhlanganisela ye-silicon nitride ye-thermal conductivity emaphakathi (70–90 W/m·K) namandla akhethekile emishini iyenza ibe inketho ekhethwayo kulesi siqhathaniso se-ceramic PCB.

Kuziguquli zamandla aphansi e-DC-DC namandla ajwayelekile, i-aluminium oxide inikeza ukusebenza okwanele ngezindleko eziphansi. Umehluko oyinhloko usebunzimeni bendawo yokusebenza kanye nempilo yonke edingekayo.

3. Ama-RF kanye nama-Microwave Amplifiers

Izikhulisamandla zamafrikhwensi erediyo ezisebenza kumafrikhwensi angaphezu kuka-1 GHz ziyazuza kusukela ekuhlanganisweni kwe-aluminium nitride yokushintshwa kwe-thermal ephezulu, ukulahleka kwe-dielectric okuphansi, nokumatanisa okuhle kokunwetshwa kokushisa okuhambisana ne-gallium nitride noma amadivayisi we-gallium arsenide.

Izinto ezisetshenziswayo zinika amandla ukususwa kokushisa okusebenzayo kuma-transistors e-RF aminyene ngenkathi kugcinwa ubuqotho besignali. Kuzinhlelo zokusebenza ze-RF ezinamandla aphansi, i-aluminium oxide ihlala isebenza futhi iyonga.

4. I-Aerospace kanye ne-Defence Systems

Izinhlelo zokusebenza zezempi nezomkhathi zivame ukucacisa izinto ezivela kulokhu kuqhathaniswa kwe-ceramic PCB ngokusekelwe kuzimfuneko zokusebenza eziphezulu kunokuthuthukisa izindleko. I-Aluminium nitride isebenzisa ama-avionics athembeke kakhulu kanye nezinhlelo zokuxhumana ngempumelelo.

I-Beryllium oxide isalokhu icaciswe ezinhlelweni ezithile zezempi eziyifa kanye nezimo ezishisayo zokulawula ukushisa lapho ubungozi bobuthi bungakwazi ukulawulwa ngokukhiqiza okulawulwayo kanye nokusingatha izivumelwano. Kodwa-ke, imiklamo emisha iya ngokuya ithanda i-aluminium nitride ukugwema izinkinga ze-BeO.

Izinkombandlela Zokuklama Nokukhiqiza

1. Thermal Path Design Ukucatshangelwa

Onjiniyela abakhetha izinto zokwakha kulesi siqhathaniso se-ceramic PCB kufanele bacabangele izici ezimbalwa zokuklama ezingaphezu kwezicaciso eziyisisekelo ezishisayo nezikagesi. Idizayini yendlela eshisayo kufanele ibhekele ukuguquguquka kwe-thermal kwe-substrate, okuhlanganisa izindawo ezanele zokusabalalisa zethusi kanye nezakhiwo zokuhambisa ukushisa kusuka emishinini kuya kumasinki okushisa.

Ugqinsi lwe-substrate kufanele lulinganise ukuqina kwemishini, ukumelana nokushisa, nezingqinamba zokukhiqiza, ngokuvamile ezisukela ku-0.25 mm kuya ku-1.5 mm kuye ngosayizi webhodi nokusetshenziswa kwayo. Ama-substrates azacile anciphisa ukumelana nokushisa kodwa adinga ukuphathwa ngokucophelela ngesikhathi sokuhlanganisa.

2. Ukukhetha nokucutshungulwa kwe-Metallization

Ukukhethwa kwe-metallization kuthinta kokubili ukusebenza nokuthembeka. Izinketho ezilandelayo zinezidingo ezahlukene:

• I-metalization yefilimu ewugqinsi - I-Tungsten, i-molybdenum, noma i-copper paste inikeza izixazululo ezingabizi kakhulu ezinogqinsi olusuka ku-10 kuya ku-25 microns kuma-substrates amaningi e-ceramic.
• I-Direct bonded copper (DBC) - Izicelo ezidinga ukumelana nogesi okuphansi zisebenzisa izinqubo ze-DBC, zithola ugqinsi lwethusi lwama-microns angama-200-400 ngokunamathela okuhle kakhulu.
• Ukubhula kwensimbi okusebenzayo (AMB) - Enye indlela yokwenza insimbi ephezulu enikeza ukusebenza okufanayo ku-DBC enezici zenqubo ezihlukile

3. Ukuguqulwa Kwenqubo Yomhlangano

Izinqubo zokumaketha nokuhlanganisa kufanele zihambisane nesisindo sokushisa esiphezulu se-ceramic substrates uma kuqhathaniswa namabhodi ezinto eziphilayo. Amaphrofayili okugeleza kabusha angase adinge izindawo zokushisa ezinwetshiwe kanye namazinga okushisa aphakeme aphakeme ukuze kuqinisekiswe ukuncibilika okwanele kwe-solder nokumanzisa.

Amandla aphezulu e-Silicon nitride anika amandla ukuphatha okunolaka, kuyilapho i-aluminium oxide ne-aluminium nitride idinga idizayini yokulungisa ngokucophelela ukuze kuvinjelwe ukuqhekeka komphetho ngesikhathi sokuhlanganisa. Ukuthuthukiswa kwenqubo kufanele kubhekele izici ezithile zezinto.

4. Izidingo Zokuphatha Izinto Ezikhethekile

Kuma-silicon carbide substrates anezendlalelo zokufakelwa, abaklami kufanele baqinisekise ubuqotho be-dielectric ngokuhlolwa kwe-voltage ephezulu futhi baqinisekise ukuthi amaphethini e-metallization agcina i-creepage eyanele kanye namabanga okususwa. Isakhiwo esiyinhlanganisela sidinga ukuqinisekiswa okwengeziwe ngale kwama-substrates e-ceramic ajwayelekile.

Ama-substrates e-beryllium oxide adinga izinqubo ezikhethekile zokubamba, izindawo zokukhiqiza ezizinikele, kanye nemithethonqubo ebanzi yokuphepha kwabasebenzi okufanele isungulwe ngaphambi kokukhethwa kwezinto ezibonakalayo. Ubunkimbinkimbi bokusebenza buvame ukudlula izinzuzo zokusebenza okushisayo kwezinhlelo zokusebenza eziningi zezentengiso.

Isifinyezo Sokukhetha Okubalulekile kwe-Ceramic PCB

Lesi siqhathaniso se-ceramic PCB sibonisa ukuthi ukukhethwa kwezinto ezifanele kuncike ezintweni eziza kuqala eziqondene nohlelo lokusebenza kunokuphakama kwendawo yonke. Uhlaka lwesinqumo olulandelayo lunikeza isiqondiso esisebenzayo:

• Aluminium oxide – Khetha izinhlelo zokusebenza ezingazweli izindleko ezinamandla okuminyana kwamandla amaphakathi angaphansi kuka-5 W/cm² lapho ukwethembeka okuqinisekisiwe kubaluleke ngaphezu kokusebenza kokushisa kokugcina
• I-Aluminium nitride - Cacisa lapho kudingeka khona ukuhanjiswa okushisayo okungaphezu kuka-150 W/m·K, ikakhulukazi kuma-LED anamandla amakhulu, izikhulisamsindo ze-RF, noma izinhlelo zokusebenza ezidinga ukufaniswa kwe-CTE namadivayisi e-silicon
• I-silicon nitride - Khetha izinhlelo zokusebenza zezimoto nezezimboni lapho amandla emishini, ukumelana nokushaqeka okushisayo, kanye nokuthembeka kwesikhathi eside ngokusebenzisa ibhayisikili elishisayo elinamandla kuqinisekisa izindleko eziphakeme kakhulu
• I-silicon carbide - Cabangela kuphela izinhlelo zokusebenza ezikhethekile zezinga lokushisa eliphezulu elingaphezu kuka-300°C lapho izinga lokushisa elisebenzayo liyinkimbinkimbi yezendlalelo ezihlanganisiwe zokufakelwa kanye nezindleko zeprimiyamu kwamukeleka.
• I-Beryllium oxide - Gwema ngaphandle uma kungekho okunye okokusebenza okuhlangabezana nezidingo ezishisayo nekhono lenhlangano elikhona lokulawula ubuthi, ukuthobela imithetho, kanye nezinqubo zokuphatha ezikhethekile

Ezimweni eziningi, i-aluminiyamu nitride inikeza ukusebenza okwanele okushisayo ngaphandle kokuphepha nomthwalo wokulawula we-beryllium oxide, ikwenze kube ukukhetha okungokoqobo kwezidingo zokuqhuba okushisayo okuphezulu.

Uzakwethu ne-Highleap Electronics Yeze-Ceramic PCB Manufacturing

Kwa-Highleap Electronics, singochwepheshe ekukhiqizeni ama-PCB e-ceramic anokwethenjelwa okuphezulu kuzo zonke izingxenye ze-aluminium oxide, i-aluminium nitride, kanye ne-silicon nitride. Ithimba lethu lobunjiniyela linikeza isiqondiso sokukhetha izinto, ukulingisa ukushisa, kanye nokusekelwa kokuklama ukukhiqiza ukuze kuthuthukiswe imiklamo yakho ye-PCB ye-ceramic ukuze isebenze kahle, ithembeke, kanye nezindleko.

Xhumana nathi ukuze uxoxe ngezidingo zakho ezithile zokuphatha okushisayo futhi uthole izincomo zochwepheshe ezisekelwe kulokhu kuhlaziywa kokuqhathanisa okubalulekile kwe-ceramic PCB. Siletha ama-substrates e-ceramic anembayo ahlangabezana nezidingo ezidingekayo zama-electronics, amasistimu e-RF, nezinhlelo zokusebenza ezinokwethenjelwa okuphezulu.

imibuzo ejwayelekile ukubuzwa

1. Iyiphi impahla ye-ceramic PCB enikezela nge-thermal conductivity ephakeme kakhulu?

I-Beryllium oxide ihlinzeka ngokusebenza okuphezulu kakhulu kwe-thermal ku-250–300 W/m·K phakathi kwezinto ze-ceramic PCB. Kodwa-ke, ubuthi bayo nemikhawulo yokulawula ikhawulela ukusetshenziswa okungokoqobo. I-Aluminium nitride imele inketho ekhethwayo ye-high-thermal-conductivity ku-170–230 W/m·K ngaphandle kokukhathazeka ngobuthi, iyenze ifanelekele izinhlelo zokusebenza zentengiso ezidinga ukulahlwa kokushisa okuhle kakhulu.

2. Iyiphi impahla ye-ceramic PCB engabizi kakhulu?

I-Aluminium oxide (i-Al₂O₃) inikeza isilinganiso esingcono kakhulu sokusebenza kwezindleko zezinhlelo zokusebenza ezijwayelekile, ngokuhambisa okushisayo okungu-20–30 W/m·K okwanele kokuminyana kwamandla ngaphansi kuka-5 W/cm². Izinqubo zayo zokukhiqiza ezivuthiwe kanye nochungechunge olusungulwe lokunikezela lwenza amanani entengo ancintisane okukhiqizwa kwevolumu, okukwenza kube ukukhetha okuyisisekelo lapho izidingo zokushisa zilinganiselwe.

3. Iyiphi impahla efanela kangcono amandla kagesi ezimoto?

I-Silicon nitride (Si₃N₄) ihlinzeka ngokusebenza okuphelele kwezinhlelo zezimoto ngamandla ayo akhethekile okusebenza kanye nokumelana nokushaqeka okushisayo. Izinto ezisetshenziswayo zisinda ngokuthembekile ekuhambeni kwamabhayisikili okushisa okuqinile okutholakala ezindaweni zezimoto kuyilapho kunikeza ukuqhutshwa kokushisa okwanele okungu-70–90 W/m·K. Le nhlanganisela ibhekana nokuphathwa okushisayo kanye nezidingo zokwethenjelwa zesikhathi eside zama-inverter ama-traction namadrayivu emoto.

4. Ingabe i-silicon carbide ingasetshenziswa ngokuqondile njenge-substrate ye-PCB?

I-silicon carbide isebenza ngogesi futhi ayikwazi ukusebenza njenge-substrate evikelayo ngaphandle kwezingqimba ze-dielectric ezengeziwe. Izinhlelo zokusebenza ezisebenzisa i-SiC zidinga izendlalelo zokufakelwa ezifakiwe ezifana ne-silicon dioxide noma i-aluminium nitride kusisekelo se-SiC, kwakheka isakhiwo esiyinhlanganisela esisebenzisa izici ezishisayo ze-SiC kuyilapho sinikeza ukuhlukaniswa kukagesi okudingekile phakathi kokulandela umkhondo.

5. I-aluminium nitride iqhathaniswa kanjani ne-aluminium oxide?

Kulesi siqhathaniso se-ceramic PCB ye-ceramic, i-aluminium nitride iletha i-thermal conductivity ephakeme ngokuphindwe kasithupha kuya kweziyisishiyagalombili (170–230 W/m·K uma kuqhathaniswa no-20–30 W/m·K) kanye nokumataniswa okungcono kwe-CTE kumadivayisi we-silicon (4.5 ppm/K uma kuqhathaniswa no-6.5–7.5 ppm/K). Nokho, i-AlN ibiza izikhathi ezimbili kuya kwezine ngaphezu kwe-Al₂O₃. I-premium ifaneleka ezinhlelweni zokusebenza zokuminyana kwamandla angaphezu kuka-10 W/cm² lapho ukunqanyulwa kokushisa okuphakeme kuthinta ngokuqondile ukusebenza nokuthembeka.