Alumina PCB Ceramic PCB Manufacturing

Alumina PCBs (aluminium oxide-based printed circuit boards) ke khetho e ntseng e tsoela pele ho tsebahala bakeng sa lisebelisoa tsa elektronike tse sebetsang hantle ka lebaka la thepa ea tsona e tsotehang ea mocheso, motlakase le mechine. Ha lisebelisoa li ntse li rarahana le ho ba thata, li-PCB tsa alumina li fana ka melemo ea bohlokoa lits'ebetsong tsa matla a holimo, tse phahameng, le tikoloho e thata. Sengoliloeng sena se fana ka tlhahlobo e felletseng ea li-PCB tsa alumina, tse koahelang melemo ea tsona e ikhethang, ho rarahana ha liqapi tsa tsona, liphephetso tsa moralo le libaka tsa bohlokoa tsa ts'ebeliso.

Li-PCB tsa Alumina ke eng?

Li-PCB tsa Alumina ke liboto tsa potoloho tse hatisitsoeng tse thehiloeng ho ceramic tse sebelisang aluminium oxide (Al₂O₃) e le thepa ea substrate, e leng se etsang hore li fapane le li-PCB tsa FR-4 tse tloaelehileng . Leha thepa ea FR-4—e entsoeng ka epoxy e matlafalitsoeng ka fiberglass—e sebelisoa haholo ka lebaka la litšenyehelo tsa eona tse tlase le ts'ebetso e ntle, li thatafalloa lits'ebetsong tse hlokang conductivity e phahameng ea mocheso le matla a mechini. Li-PCB tsa Alumina lia ipabola libakeng tsena 'me li khethoa bakeng sa lisebelisoa tse nang le matla a phahameng, lipotoloho tsa RF/microwave, le lits'ebetso maemong a feteletseng a tikoloho.

Li-PCB tsa letsopa li ka etsoa ka thepa e fapaneng, ho kenyeletsoa aluminium nitride (AlN) le beryllium oxide (BeO), empa alumina ke eona e sebelisoang haholo ka lebaka la ho leka-lekana ha litšenyehelo, ho fumaneha ha eona le thepa e ntle haholo.

Melemo ea Bohlokoa ea Alumina PCBs

Li-PCB tsa Alumina li fana ka melemo e 'maloa ea tekheniki e li etsang hore e be tse loketseng bakeng sa lits'ebetso tse boima:

1. Superior Thermal Conductivity

Thermal conductivity ea Alumina hangata e pakeng tsa 20-30 W/m·K, e fetang hōle FR-4's conductivity ea mocheso ea 0.3-0.5 W/m·K. Thepa ena e bohlokoa bakeng sa ho qhala mocheso o hlahisoang ke lisebelisoa tse matla tse kang liamplifiers, light-emitting diodes (LEDs), le high-frequency transistors. Tsamaiso e sebetsang hantle ea mocheso e thibela ho futhumala ha karolo, ho ka senyang ts'ebetso kapa ho lebisa ho hloleheng ha lisebelisoa.

Leha alumina e sebetsa ho feta aluminium nitride (AlN) mabapi le conductivity ea mocheso (e ka fihlang ho 170 W/m·K), e ntse e le thepa e sebelisoang haholo ka lebaka la melemo ea eona ea litšenyehelo le ts'ebetso e lekaneng lits'ebetsong tse ngata.

2. Motlakase o Phahameng oa Motlakase

Li-PCB tsa Alumina li fana ka mokelikeli o babatsehang oa motlakase, ka matla a dielectric a atisang ho feta 15-20 kV/mm. Sena se etsa hore alumina e be substrate e loketseng bakeng sa lits'ebetso tsa motlakase o phahameng, kaha e khona ho mamella khatello e kholo ea motlakase ntle le ho robeha. Thepa ea "dielectric" e tlase (e ka bang 9.8 ho 1 MHz) e fokotsa ho fokotseha ha lets'oao, e leng thepa ea bohlokoa bakeng sa li-circuits tsa RF le microwave.

3. Matla a Mechini le ho tšoarella

Alumina e fana ka matla a ikhethang a mochini, ka matla a hatellang a fihlang ho 3,500 MPa le matla a kobehang a pakeng tsa 300-400 MPa. Ho tšoarella hona ho netefatsa ts'ebetso e tšepahalang esita le libakeng tse pepesehileng khatello ea mochini, joalo ka lisebelisoa tsa likoloi kapa tsa sefofane. Ho feta moo, ho thatafala ha alumina (hoo e ka bang 9 sekaleng sa Mohs) ho netefatsa hore li-PCB li lula li tšoarella ebile li sa khone ho apara ka nako e telele.

4. Ts'ebetso e tsitsitseng ka Maemo a Feteletseng

Alumina e na le coefficient ea katoloso ea mocheso (CTE) e ka bang 7-8 ppm/°C, e haufi le silicon's CTE (2.5-3 ppm/°C). Khokahano ena e etsa hore alumina e be karolo e ka tšeptjoang bakeng sa lipotoloho tse nyalisitsoeng tse kopanyang likarolo tse thehiloeng ho silicon. Ho feta moo, ho hanyetsa ha alumina ho senyeha ha lik'hemik'hale le ho bola, hammoho le mocheso oa eona o phahameng oa ho sebetsa (ho fihla ho 1600 ° C), ho e lumella ho sebetsa ka mokhoa o tsitsitseng libakeng tse thata.

5. Khanyetso ea Tikoloho le Mahlaseli

Li-PCB tsa Alumina ka tlhaho li hanana le mongobo, mahlaseli a kotsi, le maemo a fapaneng a tikoloho, e leng se etsang hore li tšepahale haholo lits'ebetsong tse hlokang tse kang puisano ea sathelaete, litsamaiso tsa sesole le ho hlahloba sebaka. Botsitso ba bona libakeng tse feteletseng bo eketsa nako ea bophelo ba bona mme bo netefatsa nako e telele ea mekhoa ea elektronike e sebelisoang maemong a thata.

Mefuta ea Alumina Substrates le Litšobotsi tsa tsona

Li-substrates tsa Alumina li fumaneha ka limaraka tse fapaneng, e 'ngoe le e' ngoe e fana ka thepa e ikhethileng e loketseng lits'ebetso tse ikhethileng:

1. 99.6% Alumina PCB

Ena ke lisebelisoa tsa alumina tse hloekileng tse sebelisoang haholo-holo lits'ebetsong tsa filimi e tšesaane moo ho hlokahalang ho nepahala ho phahameng le ho fokolang haholo. E na le ntlha ea ho qhibiliha hoo e ka bang 1600 ° C 'me e bonts'a thepa e babatsehang ea mocheso le mochine. Ka lebaka la bohloeki ba eona bo phahameng, 99.6% alumina e loketse lits'ebetso tse hlokang ts'epo e phahameng, joalo ka sefofane le lisebelisoa tsa elektronike tsa bongaka.

2. 99.5% Alumina PCB

Joalo ka 99.6% alumina, thepa ena hangata e sebelisoa lipotolohong tsa microwave. E arolelana thepa e ngata le 99.6% alumina empa ka kakaretso e fumaneha habonolo ebile e na le litšenyehelo tse ngata, e etsa hore e tumme bakeng sa lits'ebetso moo ts'ebetso le litšenyehelo li tlamehang ho leka-lekana.

3. 96% Alumina PCB

Ena ke alumina ea boemo bo tloaelehileng e sebelisoang lipotolohong tse teteaneng tsa lifilimi le lisebelisoa tsa hybrid microelectronic. E na le sebaka se tlase sa ho qhibiliha hanyenyane (e ka bang 1400 ° C) 'me e fokotsehile matla a mochine ha a bapisoa le alumina ea bohloeki bo phahameng empa e sebelisoa haholo ka lebaka la ho boloka litšenyehelo ho lisebelisoa tsa motlakase tsa bareki, lisebelisoa tsa indasteri le lisebelisoa tsa likoloi.

Mekhoa ea ho Fabrication bakeng sa Alumina PCBs

Li-PCB tsa Alumina li entsoe ka mekhoa e 'maloa e ikhethang, e' ngoe le e 'ngoe e ipapisitse le thepa ea ceramic ea thepa. Mekhoa ea bohlokoa e kenyelletsa:

1. Theknoloji ea lifilimi tse teteaneng

Ha ho etsoa filimi e teteaneng, pente e tsamaisang - eo hangata e leng silevera, khauta, platinum kapa palladium - e hatisitsoe skrineng holim'a substrate ea alumina. Mokhoa oa potoloho o etsoa lera ka lera, 'me lera le leng le le leng le chesoa ka mocheso o phahameng (850 ° C ho ea ho 1000 ° C) ho kopanya thepa ea conductive sebakeng sa ceramic. Theknoloji ea filimi e teteaneng e loketse li-circuits tsa multilayer ka motlakase oa motlakase ka lebaka la bonolo le theko e tlaase.

Leha ho le jwalo, theknoloji e teteaneng ya filimi e na le mefokolo mabapi le ho nepahala le qeto, e leng se ka nnang sa se be ntle bakeng sa ditshebediso tsa kgokelo ya maqhubu a phahameng (HDI).

2. Thin Film Technology

Ho etsoa ha filimi e tšesaane ho fana ka ho nepahala ho holimo le ho lokisa likarolo tse ntle ha ho bapisoa le mekhoa e teteaneng ea lifilimi. Ts'ebetsong ena, tšepe e tšesaane (joalo ka khauta, koporo, kapa aluminium) e kenngoa holim'a karoloana ea alumina ho sebelisoa mekhoa e kang ho sputtering kapa mouoane. Mokhoa oa potoloho o hlalosoa ka photolithography le lik'hemik'hale tsa lik'hemik'hale, tse hlahisang lipotoloho tse phahameng tse nang le mekhoa e metle ho ea fihla sekala sa micron.

Theknoloji ea filimi e tšesaane e sebelisoa hangata lits'ebetsong tsa RF le microwave, moo botšepehi ba matšoao le ts'ebetso ea maqhubu a phahameng a leng bohlokoa.

3. Koporo e Kopantsoeng ka kotloloho (DBC)

Direct Bonded Copper (DBC) ke mokhoa oo foil ea koporo e tlamahanngoang ka ho toba le substrate ea alumina ka mokhoa o phahameng oa mocheso (hangata o pota-potileng 1065 ° C). Koporo e theha maqhama a metallurgical le alumina, e hlahisang khokahanyo e ka tšeptjoang haholo le e matla. Joale lera la koporo le ka hlophisoa ho theha mesaletsa ea potoloho.

DBC e sebelisoa haholo ho lisebelisoa tsa elektronike tsa matla, tse kang li-modules tsa insulated-gate bipolar transistor (IGBT) le mabone a LED a matla a phahameng, moo matla a phahameng a hona joale le ho senya mocheso o sebetsang hantle ho hlokahalang.

4. Li-Ceramics tsa Mocheso o Tlase (LTCC)

LTCC e kenyelletsa ho bokella likarolo tse ngata tsa tepi ea alumina, karolo e 'ngoe le e' ngoe e nang le lipaterone tse boletsoeng esale pele tse entsoeng ka pente ea conductive. Ka mor'a moo, lihlopha tsena li entsoe ka laminated 'me li kopane ka mocheso o batlang o le tlaase (ka tlase ho 900 ° C). Theknoloji ea LTCC e loketse ho hlahisa li-circuits tse ngata tse kopanetsoeng 'me e lumella ho kopanngoa ha likaroloana tse sa sebetseng ka har'a lihlopha, ho etsa hore e tšoanelehe bakeng sa lisebelisoa tse kang li-module tsa RF le lisebelisoa tsa microwave.

Mehopolo ea Moralo bakeng sa Alumina PCBs

Ha ba theha li-PCB tsa alumina, baenjiniere ba tlameha ho ikarabella bakeng sa lintlha tse 'maloa tse ikhethang:

1. Moralo oa Potoloho ea Maqhubu a Phahameng

Tahlehelo e tlase ea dielectric ea Alumina le botsitso ba maqhubu a holimo li etsa hore e be e loketseng lipotoloho tsa RF le microwave. Leha ho le joalo, ho lokela ho nahanoa ka hloko mabapi le ho tsamaisana ha impedance le pontšo ea botšepehi. Baqapi ba lokela ho fokotsa bokhoni ba crosstalk le parasitic capacitance, haholo-holo lipotolohong tse lebelo le holimo, ho netefatsa ts'ebetso e nepahetseng.

2. Matla a Mechini le ho tšoarella

Leha alumina e tšoarella haholo, e boetse e brittle ha e bapisoa le lisebelisoa tse kang FR-4. Ho nahanoa ka hloko botenya ba boto, meaho ea ts'ehetso, le mekhoa ea ho holisa hoa hlokahala ho thibela ho hloleha ha mochini, haholo lits'ebetsong tse pepesehileng ho thothomela kapa ho ts'oha.

3. Mekhoa ea Tsamaiso ea Mocheso

Thermal conductivity e phahameng ea Alumina e etsa hore e tšoanelehe hantle bakeng sa tsamaiso ea mocheso, empa mehato e eketsehileng e ka 'na ea hlokahala ho matlafatsa ho qhala ha mocheso. Hangata baqapi ba kenyelletsa li-vias tse futhumatsang, lisinki tsa mocheso, le ho beha likarolo tse nepahetseng ho ntlafatsa ts'ebetso ea mocheso oa li-PCB tsa alumina, haholo lits'ebetsong tsa matla a phahameng.

4. Ho kopanya le Likarolo tsa Silicon

Li-PCB tsa Alumina li sebelisoa hangata ho meralo e nyalisitsoeng e nang le likarolo tse thehiloeng ho silicon. Ka lebaka la phapang ea CTE lipakeng tsa alumina le silicon, baenjiniere ba tlameha ho nahana ka hloko ka katoloso ea mocheso nakong ea moralo. Mekhoa ea ho kopanya ka kotloloho, joalo ka DBC, e ka thusa ho fokotsa litaba tse amanang le ho se tsamaisane ha mocheso.

Lisebelisoa tsa Alumina PCBs

• • Likoloi tsa Elektroniki
  • Lisebelisoa tsa motlakase
  • RF le Microwave Systems
  • Aerospace le Defense
  • LED Lighting
  • Mechine ea Bongaka
  • Mekhoa ea Matla a Tsosolositsoeng
  • Mehala ea likhokahanyo
  • Consumer Electronics

fihlela qeto e

Li-PCB tsa Alumina li fana ka melemo e mengata ho feta lisebelisoa tsa setso tsa PCB joalo ka FR-4, e leng se etsang hore e be tsa bohlokoa ho lisebelisoa tsa elektroniki tsa sejoale-joale. Ka taolo e phahameng ea mocheso, matla a mochini, le ho kenya motlakase, li-PCB tsa alumina li tšoaneleha hantle bakeng sa ts'ebeliso ea matla a phahameng, maqhubu a phahameng le tikoloho e thata. Ha thekenoloji e ntse e tsoela pele ho fetoha, li-PCB tsa alumina li mothating oa ho bapala karolo e kholoanyane libakeng tse kang lisebelisoa tsa elektroniki tsa likoloi, li-module tsa motlakase, litsamaiso tsa RF, le IoT, tse totobatsang bohlokoa ba tsona ba bohlokoa ho lisebelisoa tsa elektroniki tsa moloko o latelang.