Ho utloisisa Aluminium Substrate PCB: Mefuta le Melemo

Li-PCB, kapa liboto tsa potoloho tse hatisitsoeng, ke likarolo tsa bohlokoa hoo e batlang e le lisebelisoa tsohle tsa elektroniki. Ho ntlafatsa kutloisiso ea hau ea li-PCB, tataiso ena e tla hlahisa mefuta ea li-substrate tsa aluminium tsa PCB le litšitiso tse tloaelehileng ho kopitseng li-PCB. Haeba u na le thahasello ho li-PCB kapa litaba tsa sengoloa sena, ikutloe u lokolohile ho tsoela pele ho bala.

Ke eng e etsang hore li-PCB tsa Aluminium Substrate li hlahelle?

Pejana, re buisane ka melemo le mathata a li-PCB tsa ceramic, re hlokometse hore bothata bo bong ke litšenyehelo tsa tsona tse phahameng le ho fokola. Li-PCB tse tloaelehileng tsa fiberglass ha li na mokhoa o motle oa ho qhala mocheso, ha li-PCB tsa ceramic li tsitsitse ebile li hanela ho fetoha ha mocheso libakeng tse nang le mocheso o phahameng le mongobo o phahameng, empa li theko e boima 'me li sebelisoa haholo-holo lihlahisoa tsa maemo a holimo. Haeba sehlahisoa sa hau se se sa maemo a holimo, joalo ka liboto tsa mabone a LED a sebaka se seholo, a matla a phahameng a hlokang ho qhala mocheso hantle empa a le theko e tlase, na ho na le thepa e lumellanang le seo?

Karabo ke e, 'me ke moo li-PCB tsa aluminium substrate li kenang teng. Aluminium, kaha ke tšepe e nang le conductivity, e ka bonahala e le khetho e sa tloaelehang bakeng sa thepa ea PCB , empa li-PCB tsa aluminium substrate li na le mekhahlelo e meraro: foil ea koporo, lera la insulation, le lera la aluminium ea tšepe. Kaha ho na le lera la insulation, na lisebelisoa tse ling ntle le aluminium li ka sebelisoa bakeng sa lera la tšepe? Lisebelisoa tse kang koporo, tšepe e sa ruseng, tšepe, tšepe ea silicon, jj.? Ha u khetha substrate ea tšepe, lintlha tse kang coefficient ea katoloso ea mocheso, conductivity ea mocheso, matla, thatafalo, boima, boemo ba bokaholimo le litšenyehelo li hloka ho nahanoa.

Ka kakaretso, ha ho nahanoa ka litšenyehelo le ts'ebetso ea tekheniki, aluminium ke khetho e nepahetseng. Likhetho tse tloaelehileng bakeng sa mapolanka a aluminium li kenyelletsa 6061, 5052, 1060, joalo-joalo Haeba ho na le litlhoko tse phahameng tsa conductivity ea mocheso, ts'ebetso ea mechine, ts'ebetso ea motlakase, le lisebelisoa tse ling tse khethehileng, koporo, tšepe e sa hloekang, tšepe le silicon e ka boela ea sebelisoa.

E tloaelehileng lihlahisoa tsa mabone a LED, li-PCB tsa aluminium substrate li na le mahlakoreng a mabeli: lehlakore le le leng le lesoeu bakeng sa lisebelisoa tsa LED tsa soldering, 'me ka lehlakoreng le leng ke' mala oa tlhaho oa aluminium, oo hangata o koahetsoeng ka pente ea mocheso ho kopana le karolo e tsamaisang mocheso. Li sebelisoa haholo-holo ho mabone a LED, lisebelisoa tsa molumo, lisebelisoa tsa motlakase, joalo-joalo, 'me molemo o moholo ke ho tsamaisa mocheso ka potlako le ts'ebetso e ntle ea ho felisa mocheso.

Ha ho bapisoa le FR-4 ea setso , li-PCB tsa aluminium substrate li ka fokotsa khanyetso ea mocheso, tsa fana ka phetisetso e ntle ea mocheso; ha li bapisoa le li-substrate tsa ceramic, li na le thepa e ntle ea mechini.

 Mefuta ea li-Aluminium Substrates tsa PCB

1. Li-substrate tsa Aluminium tse Tenyetsehang : E ​​'ngoe ea lintlafatso tsa morao-rao thepa ea IMS ke dielectric tse tenyetsehang. Lisebelisoa tsena li fana ka ho thibela motlakase hantle, ho tenyetseha, le ho tsamaisa mocheso hantle. Ha li sebelisoa linthong tse kang 5754 kapa aluminium e tenyetsehang e tšoanang, li ka bōptjoa ho fihlela libopeho le likhutlo tse fapaneng, ho felisa tlhoko ea lisebelisoa tse turang, likhoele le lihokelo. Le hoja lisebelisoa tsena li tenyetseha, li etselitsoe ho kobeha sebakeng sa tsona le ho lula li le boemong ba tsona.

2. Di-substrate tsa Aluminium tse Kopantsweng : Sebopehong sa IMS sa "hybrid", dintho tse seng tsa mocheso di sebetswa ka boikemelo ebe di hokahanngwa le substrate ya aluminium ka thepa ya mocheso. Sebopeho se tlwaelehileng haholo se na le dikarolo tse 2 kapa tse 4 tsa dikarolwana tse entsweng ka FR-4 ya setso, tse ntan'o hokahanngwa le motheo wa aluminium ka dielectric e tsamaisang mocheso. Sena se ka thusa ka ho qhalana ha mocheso, ho ntlafatsa ho tiya, le ho sebetsa e le tšireletso. Melemo e meng e kenyeletsa:

• • Theko e tlase ho feta ho aha lisebelisoa tsohle tse futhumatsang.
  • Ts'ebetso e ntle ea mocheso ho feta lihlahisoa tse tloaelehileng tsa FR-4.
  • Ho felisoa ha lisinki tse theko e boima tsa mocheso le mehato e amanang le kopano.
  • E loketse lits'ebetso tsa RF tse hlokang likarolo tsa bokaholimo ba PTFE bakeng sa litšobotsi tsa tahlehelo ea RF.
  • Tšebeliso ea lifensetere tsa likarolo ka aluminium ho amohela likarolo tsa lesoba, ho lumella likhokahano le likhoele hore li fete ka har'a boto ha li ntse li soasoa likhutlong ho theha tiiso, ntle le tlhokahalo ea li-washer tse khethehileng kapa li-adapter tse ling tse theko e boima.

3. Di-substrate tsa Aluminium tse nang le mekhahlelo e mengata : 'Marakeng oa phepelo ea motlakase o sebetsang hantle, li-PCB tsa IMS tse nang le mekhahlelo e mengata li entsoe ka mekhahlelo e mengata ea dielectric ea mocheso. Meaho ena e na le lera le le leng kapa ho feta la lipotoloho tse kentsoeng ka har'a dielectric, ka li-via tse foufetseng tse sebelisoang e le li-via tsa mocheso kapa litsela tsa matšoao. Le hoja meralo ea lera le le leng e le theko e boima ebile e sa sebetse hantle ho fetiseng mocheso, e fana ka tharollo e bonolo le e sebetsang ea ho qhala mocheso bakeng sa meralo e rarahaneng haholoanyane.

4. Di-substrate tsa Aluminium tse phunyeletsang : Meahong e rarahaneng ka ho fetisisa, lera la aluminium le ka etsa "bohare" ba meaho e nang le mocheso o nang le mekhahlelo e mengata. Pele ho lamination, aluminium e pentiloe esale pele mme e tlatswa ka dielectric. Thepa e futhumatsang kapa dikarolo tse nyane di ka pentiloe ka mahlakoreng ka bobedi a aluminium ho sebediswa lera la sekgomaretsi se futhumatsang. Hang ha e pentiloe, karolo e phethilweng e tshwana le substrate ya aluminium e nang le mekhahlelo e mengata e tjhekilweng ka hara aluminium. Masoba a phunyeletsang a feta dikgeong tsa aluminium ho boloka ho kwahela motlakase. Ka tsela e nngwe, di-core tsa koporo di ka dumella dikgokelo tsa motlakase tse tobileng hammoho le masoba a phunyeletsang a tjhesang.

Melemo ea PCB Aluminium Substrates

Ntle le ts'ebetso ea eona e ntle ea ho senya mocheso, aluminium substrate PCB e na le melemo e latelang:

• Ho lumellana le litlhoko tsa tikoloho tsa RoHS.
• E loketseng haholoanyane bakeng sa ts'ebetso ea SMT.
• Bokhoni bo phahameng ba ho tsamaisa hona joale.
• Ho sebetsana ka katleho le phallo ea mocheso moralong oa potoloho, ho fokotsa mocheso oa mochini oa mochini, ho lelefatsa bophelo ba ts'ebeletso, ho eketsa matla a matla, le ho ntlafatsa ts'epahalo.
• Phokotso ea kopano ea lisinki tsa mocheso le lisebelisoa tse ling (ho kenyeletsoa lisebelisoa tsa sehokelo sa mocheso), ho fokotseha ha boholo ba sehlahisoa, ho fokotsa litšenyehelo tsa lisebelisoa le kopano, le ho ntlafatsa motsoako oa lipotoloho tsa motlakase le lipotoloho tsa taolo.
• Phetoho ea li-substrates tse senyehang tsa ceramic bakeng sa ho tšoarella hamolemo ha mochini.

Ha ho bapisoa le liboto tse tloaelehileng tsa FR-4, aluminium substrate PCB e na le molemo o moholo ka hore e khona ho jara hajoale. Joalo ka FR-4, likarolo tsa potoloho li sebelisa foil ea koporo e le li-conductor bakeng sa khokahano. Ha ho bapisoa le setso sa FR-4, se nang le botenya bo ts'oanang le bophara ba mohala, aluminium substrate PCB e ka jara hajoale.

Theknoloji ea mantlha ea aluminium substrate PCB e lutse ka har'a lisebelisoa tse mahareng tsa insulation, tse sebeletsang haholo mesebetsi ea bonding, insulation, le conduction ea mocheso. The insulation layer ea aluminium substrate PCB ke mokoallo o moholo ka ho fetisisa oa mocheso mohahong oa li-module tsa matla. Ho ntlafala ha mocheso oa mocheso oa lera la ho kenya letsoho, ho molemo le ho feta ho arola mocheso o hlahisoang nakong ea ts'ebetso ea sesebelisoa, e leng ho thusang ho fokotsa mocheso oa mochine, ho finyella matla a phahameng a mojule, ho fokotsa boholo, ho lelefatsa bophelo, le ho eketsa tlhahiso ea matla. Ha e ntse e kopana le tlhokahalo ea conductivity e ntle ea mocheso, e lokela ho ba le matla a phahameng a ho kenya motlakase.

Phapang lipakeng tsa Aluminium Base le FR-4 Board

Ho Felloa ke Mocheso

Phapang e kholo ka ho fetisisa pakeng tsa aluminium-based copper-clad laminate (CCL) le FR-4 CCL e tloaelehileng e itšetlehile ka thepa ea bona ea ho senya mocheso. Ka mohlala, ha ho bapisoa le 1.5mm-thick FR-4 CCL, khanyetso ea mocheso ea CCL e thehiloeng aluminium ke 20-22 ℃ bakeng sa ea pele le 1.0-2.0 ℃ bakeng sa ho qetela, e tlaase haholo.

Coefficient ea Keketseho ea Thermal

Ka tloaelo, liboto tsa FR-4 li na le mathata a ho atolosa mocheso, moo mocheso o phahameng o ka bakang liphetoho tsa botenya le ho bata, haholo-holo ka tataiso ea botenya, e amang boleng ba likoti tse entsoeng ka tšepe le lipotoloho. Sena se bakoa haholo ke li-coefficients tse fapaneng tsa katoloso ea mocheso ho tataiso ea botenya ba thepa: koporo e na le coefficient ea 17 × 10 ^ -6 cm / cm ℃, athe FR-4 boto ea motheo ke 110 × 10 ^ -6 cm / cm. ℃, e ka lebisang litlamorao tsa katoloso ea mocheso habonolo. Coefficient ea katoloso ea mocheso ea mapolanka a thehiloeng ho aluminium ke 50 × 10 ^ -6 cm / cm℃, e nyane ho feta ea mapolanka a kakaretso a FR-4, 'me e haufi le ea foil ea koporo. Sena se thusa ho netefatsa boleng le ho tšepahala ha liboto tsa potoloho tse hatisitsoeng.

Likōpo tse ka sehloohong

Liboto tsa FR-4 li loketse moralo oa potoloho ka kakaretso le lihlahisoa tse tloaelehileng tsa elektroniki. Liboto tse thehiloeng ka aluminium li loketse lipotoloho tse nang le litlhoko tse khethehileng, tse kang li-circuits tse kopantsoeng tsa filimi e teteaneng, mocheso oa mocheso bakeng sa lipotoloho tsa matla, ho phophola ha likarolo tsa lipotoloho, li-substrates tse kholo tseo li-ceramic substrates li ke keng tsa khona ho sebetsana le tsona, le li-circuits moo mocheso o tloaelehileng o sa khoneng ho o rarolla. litaba tsa ts'epo.

Sekhahla

Liboto tse thehiloeng ka aluminium li na le matla a phahameng a mochine le ho tiea, tse phahametseng liboto tsa FR-4. Ka hona, liboto tse hatisitsoeng tsa sebaka se seholo li ka etsoa ka mapolanka a thehiloeng ka aluminium, 'me likarolo tse boima li ka kenngoa holim'a li-substrates tse joalo.

Ts'ebetso ea Motlakase

Ha ho bapisoa le mapolanka a FR-4, liboto tse thehiloeng ka aluminium li na le conductivity e phahameng ea mocheso, e leng se lebisang keketsehong e kholo ea bokhoni ba hona joale ba li-conductor. Sena se bonts'a conductivity e phahameng ea mocheso oa liboto tse thehiloeng ka aluminium. Phallo ea mocheso ea mapolanka a thehiloeng ka aluminium e amana le botenya ba lera la bona la ho kenya letsoho le mocheso oa mocheso. Likarolo tse tšesaane tsa ho kenya letsoho li etsa hore ho be le mocheso o phahameng oa liboto tse thehiloeng ho aluminium (empa li sebetsa ka tlase ho mamella matla a motlakase). Bakeng sa ho netefatsa ts'ebetso ea li-circuits tsa elektroniki, likarolo tse ling tsa lihlahisoa tsa elektroniki li hloka ho thibela mahlaseli a motlakase le tšitiso. Liboto tse thehiloeng ho aluminium li ka sebetsa joalo ka lipoleiti tse sireletsang ho sireletsa maqhubu a motlakase.

Ts'ebetso ea Insulation

Tlas'a maemo a akaretsang, matla a ho senyeha ha mapolanka a thehiloeng ho aluminium a khethoa ke botenya ba lera la ho kenya letsoho, le matla a ho senya hangata a pota-potileng 500V. Haeba o hloka ho lekola matla a ho senyeha ha lebone la lebone la LED la fluorescent aluminium-based board, o hloka feela ho etsa tlhahlobo e phahameng ea motlakase ntlong ea boema-kepe ba ho kenya. Maemo a setifikeiti sa UL le CE e lokela ho ba 2500V, 'me setifikeiti sa 3C se be haufi le 3750V.