Li-Rigid-flex printed circuit boards (PCBs) li tumme ka lebaka la ho feto-fetoha ha tsona le ho tšoarella ha lisebelisoa tse fapaneng tsa elektroniki. Liboto tsena li tsejoa ka bokhoni ba tsona ba ho mamella khatello ea maikutlo le ho kobeha ha li ntse li boloka likhokahano tsa motlakase tse tšepahalang.Sengoliloeng sena se tla shebisisa ka botebo lisebelisoa tse sebelisoang ho li-PCB tse thata-flex ho fumana temohisiso mabapi le sebopeho le thepa ea tsona. Ka ho senola lisebelisoa tse etsang hore li-PCB tse thata-fetohang e be tharollo e matla le e bonolo, re ka utloisisa hore na li kenya letsoho joang ntlafatsong ea lisebelisoa tsa elektronike.
1.Utloisisa thesebopeho sa PCB se thata-flex:
A rigid-flex PCB ke boto ea potoloho e hatisitsoeng e kopanyang li-substrates tse thata le tse tenyetsehang ho etsa sebopeho se ikhethang. Motsoako ona o thusa liboto tsa potoloho hore li be le lipotoloho tse mahlakore a mararo, ho fana ka phetoho ea moralo le ho ntlafatsa sebaka sa lisebelisoa tsa elektroniki. Sebopeho sa mapolanka a rigid-flex se na le likarolo tse tharo tse kholo. Lera la pele ke lera le thata, le entsoeng ka thepa e thata e kang FR4 kapa motheo oa tšepe. Lera lena le fana ka ts'ehetso ea meralo le botsitso ho PCB, ho netefatsa ho tšoarella ha eona le ho hanyetsa khatello ea kelello ea mochini.
Lera la bobeli ke lera le tenyetsehang le entsoeng ka thepa e kang polyimide (PI), liquid crystal polymer (LCP) kapa polyester (PET). Lera lena le lumella PCB ho kobeha, ho sotha le ho kobeha ntle le ho ama tšebetso ea eona ea motlakase. Ho feto-fetoha ha lera lena ho bohlokoa bakeng sa lits'ebetso tse hlokang hore PCB e kenelle libakeng tse sa tloaelehang kapa tse thata. Lera la boraro ke lera le khomarelang, le kopanyang likarolo tse thata le tse tenyetsehang hammoho. Hangata lera lena le entsoe ka lisebelisoa tsa epoxy kapa tsa acrylic, tse khethiloeng bakeng sa bokhoni ba tsona ba ho fana ka maqhama a matla pakeng tsa lihlopha ha li ntse li fana ka thepa e ntle ea ho pata motlakase. Lera la sekhomaretsi le phetha karolo ea bohlokoa ho netefatsa ho ts'epahala le bophelo ba ts'ebeletso ea mapolanka a rigid-flex.
Karolo e 'ngoe le e' ngoe ea sebopeho sa PCB e thata-flex e khethiloe ka hloko 'me e etselitsoe ho finyella litlhoko tse khethehileng tsa mochine le motlakase. Sena se nolofalletsa li-PCB ho sebetsa ka katleho lits'ebetsong tse fapaneng, ho tloha ho lisebelisoa tsa elektroniki tsa bareki ho isa ho lisebelisoa tsa bongaka le litsamaiso tsa sefofane.
2. Lisebelisoa tse sebelisoang ka mekhahlelo e thata:
Mohahong o thata oa li-PCBs tse thata-flex, lisebelisoa tse ngata li atisa ho sebelisoa ho fana ka tšehetso e hlokahalang ea sebopeho le botšepehi. Lisebelisoa tsena li khethiloe ka hloko ho latela litšobotsi tsa tsona tse khethehileng le litlhoko tsa ts'ebetso. Tse ling tsa lisebelisoa tse sebelisoang haholo bakeng sa likarolo tse thata ho li-PCB tse thata-flex li kenyelletsa:
A. FR4: FR4 ke lera le thata la lintho tse sebelisoang haholo ho li-PCB. Ke epoxy laminate e matlafalitsoeng ka khalase e nang le thepa e babatsehang ea mocheso le mechine. FR4 e na le ho satalla ho phahameng, ho monya metsi a tlase le khanyetso e ntle ea lik'hemik'hale. Thepa ena e etsa hore e be e loketseng joalo ka lera le thata kaha e fana ka botšepehi bo botle ba sebopeho le botsitso ho PCB.
B. Polyimide (PI): Polyimide ke thepa e tsitsitseng e thibelang mocheso e atisang ho sebelisoa ka mapolanka a thata-thata ka lebaka la ho hanyetsa mocheso o phahameng. Polyimide e tsebahala ka thepa ea eona e ntle ea ho kenya motlakase le botsitso ba mochini, e etsa hore e tšoanelehe ho sebelisoa e le likarolo tse thata ho li-PCB. E boloka thepa ea eona ea mechine le ea motlakase le ha e pepesehetse mocheso o feteletseng, e etsa hore e tšoanelehe bakeng sa mefuta e mengata ea lisebelisoa.
C. Metal Core: Maemong a mang, ha ho hlokahala tsamaiso e ntle ea mocheso, lisebelisoa tsa motheo tsa tšepe tse kang aluminium kapa koporo li ka sebelisoa e le lera le thata ka har'a li-PCB tse tsitsitseng. Lisebelisoa tsena li na le conductivity e ntle ea mocheso 'me li ka khona ho senya mocheso o hlahisoang ke lipotoloho. Ka ho sebelisa motheo oa tšepe, mapolanka a thata-thata a ka laola mocheso ka katleho le ho thibela ho futhumala, ho etsa bonnete ba ho tšepahala ha potoloho le tshebetso.
E 'ngoe le e' ngoe ea lisebelisoa tsena e na le melemo ea eona 'me e khethoa ho latela litlhoko tse khethehileng tsa moralo oa PCB. Lintlha tse kang mocheso oa ho sebetsa, khatello ea mochine le matla a ho laola mocheso o hlokahalang kaofela li phetha karolo ea bohlokoa ho khethollang lisebelisoa tse loketseng bakeng sa ho kopanya likarolo tse thata le tse tenyetsehang tsa PCB.
Ho bohlokoa ho hlokomela hore khetho ea lisebelisoa bakeng sa likarolo tse thata ho li-PCB tse thata-flex ke karolo ea bohlokoa ea ts'ebetso ea moralo. Khetho e nepahetseng ea thepa e tiisa botšepehi ba sebopeho, tsamaiso ea mocheso le botšepehi ka kakaretso ba PCB. Ka ho khetha thepa e nepahetseng, baqapi ba ka etsa li-PCB tse sa fetoheng tse fihlelang litlhoko tse thata tsa liindasteri tse fapaneng, ho kenyeletsoa likoloi, sefofane, bongaka le likhokahano tsa mehala.
3.Materials sebelisoa ka lera tenyetsehang:
Mekhahlelo e feto-fetohang ka har'a li-PCB tse sa fetoheng li thusa ho kobeha le ho mena ha liboto tsena. Thepa e sebelisoang bakeng sa lera le tenyetsehang e tlameha ho bonts'a maemo a holimo, elasticity le ho hanyetsa ho khumama khafetsa. Lisebelisoa tse tloaelehileng tse sebelisoang bakeng sa li-layer tse feto-fetohang li kenyelletsa:
A. Polyimide (PI): Joalokaha ho boletsoe pejana, polyimide ke lintho tse ngata tse sebetsang tse sebeletsang merero e 'meli ho li-PCB tse thata-flex. Ka flex layer, e lumella boto hore e kobehe le ho koba ntle le ho lahleheloa ke thepa ea eona ea motlakase.
B. Liquid Crystal Polymer (LCP): LCP ke thepa e phahameng ea thermoplastic e tsejoang ka thepa ea eona e babatsehang ea mechine le ho hanyetsa mocheso o feteletseng. E fana ka phetoho e ntle haholo, botsitso bo boholo le ho hanyetsa mongobo bakeng sa meralo ea PCB e thata-flex.
C. Polyester (PET): Polyester ke thepa e theko e tlaase, e bobebe e nang le mekhoa e metle ea ho fetoha le ho sireletsa. E atisa ho sebelisoa bakeng sa li-PCB tse thata-thata moo ho boloka litšenyehelo le bokhoni ba ho kobeha bo itekanetseng bo leng bohlokoa.
D. Polyimide (PI): Polyimide ke lintho tse sebelisoang ka tloaelo ka har'a likarolo tse tenyetsehang tsa PCB tse thata. E na le phetoho e ntle haholo, e hanyetsa mocheso o phahameng le thepa e ntle ea ho kenya motlakase. Filimi ea Polyimide e ka beoa ka laminated habonolo, ea hlongoa le ho kopanngoa le likarolo tse ling tsa PCB. Li khona ho mamella ho kobeha khafetsa ntle le ho lahleheloa ke thepa ea tsona ea motlakase, e leng se etsang hore e be tse loketseng bakeng sa likarolo tse tenyetsehang.
E. Liquid crystal polymer (LCP): LCP ke lisebelisoa tse phahameng tsa thermoplastic tse ntseng li sebelisoa ka ho eketsehileng e le lera le feto-fetohang ho li-PCB tse thata-thata. E na le thepa e babatsehang ea mechine, ho kenyelletsa le ho feto-fetoha ha maemo ho phahameng, botsitso ba dimensional le khanyetso e babatsehang ea mocheso o feteletseng. Lifilimi tsa LCP li na le hygroscopicity e tlase 'me li loketse ho sebelisoa libakeng tse mongobo. Li boetse li na le lik'hemik'hale tse ntle tsa lik'hemik'hale le tse tlaase tsa dielectric kamehla, li netefatsa ts'ebetso e ka tšeptjoang maemong a thata.
F. Polyester (PET): Polyester, e tsejoang hape e le polyethylene terephthalate (PET), ke lisebelisoa tse bobebe le tse theko e tlaase tse sebelisoang likarolong tse tenyetsehang tsa li-PCB tse thata-thata. Filimi ea PET e na le maemo a bonolo, matla a phahameng a tsitsipano le botsitso bo botle ba mocheso. Lifilimi tsena li na le mongobo o tlase 'me li na le thepa e ntle ea ho kenya motlakase. Hangata PET e khethoa ha tšebeliso e ntle ea litšenyehelo le bokhoni ba ho kobeha bo itekanetseng e le lintlha tsa bohlokoa moralong oa PCB.
G. Polyetherimide (PEI): PEI ke thermoplastic e sebetsang hantle ea boenjiniere e sebelisoang bakeng sa lera le feto-fetohang la li-PCB tse thata tse thata. E na le thepa e babatsehang ea mechine, ho kenyelletsa le ho feto-fetoha ha maemo ho phahameng, botsitso ba dimensional le ho hanyetsa mocheso o feteletseng. Filimi ea PEI e na le ho monya mongobo o tlase le khanyetso e ntle ea lik'hemik'hale. Li boetse li na le matla a phahameng a dielectric le thepa e sireletsang motlakase, e li etsang hore li tšoanelehe bakeng sa lits'ebetso tse hlokang.
H. Polyethylene naphthalate (PEN): PEN ke thepa e sa tsitsang haholo le e feto-fetohang e sebelisoang bakeng sa lera le tenyetsehang la li-PCB tse thata-thata. E na le botsitso bo botle ba mocheso, ho monya mongobo o tlase le thepa e ntle ea mochini. Lifilimi tsa PEN li hanyetsana haholo le mahlaseli a kotsi a UV le lik'hemik'hale. Ba boetse ba na le dielectric e tlase e sa fetoheng le thepa e ntle haholo ea ho kenya motlakase. Filimi ea PEN e ka mamella ho kobeha khafetsa le ho mena ntle le ho ama thepa ea eona ea motlakase.
I. Polydimethylsiloxane (PDMS): PDMS ke thepa ea elastic e feto-fetohang e sebelisetsoang lera le feto-fetohang la li-PCB tse bonolo le tse thata tse kopantsoeng. E na le thepa e babatsehang ea mechine, ho kenyelletsa le ho feto-fetoha ha maemo ho phahameng, elasticity le ho hanyetsa ho khumama khafetsa. Lifilimi tsa PDMS le tsona li na le botsitso bo botle ba mocheso le thepa ea ho kenya motlakase. PDMS e sebelisoa hangata lits'ebetsong tse hlokang lisebelisoa tse bonolo, tse otlohang le tse phutholohileng, joalo ka lisebelisoa tsa elektroniki tse aparoang le lisebelisoa tsa bongaka.
E 'ngoe le e' ngoe ea lisebelisoa tsena e na le melemo ea eona, 'me khetho ea thepa ea flex layer e itšetlehile ka litlhoko tse khethehileng tsa moralo oa PCB. Lintho tse kang ho feto-fetoha ha maemo, ho hanyetsa mocheso, ho hanyetsa mongobo, ho boloka litšenyehelo le bokhoni ba ho koba li phetha karolo ea bohlokoa ho khethollang thepa e nepahetseng bakeng sa lera le tenyetsehang ho PCB e thata-flexible. Ho nahanela ka hloko ha lintlha tsena ho tiisa botšepehi ba PCB, ho tšoarella le ho sebetsa ka mefuta e sa tšoaneng ea likopo le liindasteri.
4. Lisebelisoa tse khomarelang ka har'a li-PCB tse thata-flex:
E le ho kopanya likarolo tse thata le tse tenyetsehang hammoho, lisebelisoa tsa sekhomaretsi li sebelisoa kahong ea PCB e thata-flex. Lisebelisoa tsena tsa ho kopanya li tiisa hore ho na le motlakase o ka tšeptjoang pakeng tsa lihlopha le ho fana ka tšehetso e hlokahalang ea mechine. Lisebelisoa tse peli tse sebelisoang hangata ke:
A. Epoxy Resin: Likhomaretsi tse thehiloeng ho epoxy resin li sebelisoa haholo bakeng sa matla a tsona a holimo a tlamahano le thepa e babatsehang ea ho pata motlakase. Li fana ka botsitso bo botle ba mocheso le ho ntlafatsa ho tiea ka kakaretso ha boto ea potoloho.
b. Acrylic: Likhomaretsi tse thehiloeng ho Acrylic li ratoa lits'ebetsong moo ho feto-fetoha ha maemo le ho hanyetsa mongobo ho leng bohlokoa. Likhomaretsi tsena li na le matla a matle a tlamahano le linako tse khuts'oane tsa ho folisa ho feta li-epoxies.
C. Silicone: Likhomaretsi tse entsoeng ka silicone li atisa ho sebelisoa ka mapolanka a thata-thata ka lebaka la ho feto-fetoha ha tsona, botsitso bo botle ba mocheso, le ho hanyetsa mongobo le lik'hemik'hale. Likhomaretsi tsa silicone li ka mamella mocheso o pharaletseng, li etsa hore li tšoanelehe bakeng sa lits'ebetso tse hlokang ho feto-fetoha ha maemo le ho hanyetsa mocheso o phahameng. Li fana ka tlamahano e sebetsang pakeng tsa likarolo tse thata le tse tenyetsehang ha li ntse li boloka thepa ea motlakase e hlokahalang.
D. Polyurethane: Likhomaretsi tsa polyurethane li fana ka tekanyo ea ho feto-fetoha ha maemo le matla a tlamahano ho PCBs e thata-flexible. Li na le ho khomarela hantle ho mefuta e fapaneng ea li-substrates 'me li fana ka khanyetso e babatsehang ea lik'hemik'hale le liphetoho tsa mocheso. Likhomaretsi tsa polyurethane li boetse li monya ho thothomela le ho fana ka botsitso ba mochini ho PCB. Hangata li sebelisoa lits'ebetsong tse hlokang ho tenyetseha le ho tiea.
E. UV Resin e Phekolehang: Resin e phekolehang ea UV ke sekhomaretsi se phekolang ka potlako ha se le tlas'a khanya ea ultraviolet (UV). Li fana ka nako ea ho kopanya ka potlako le ho phekola, ho etsa hore e tšoanelehe bakeng sa tlhahiso e phahameng ea molumo. Li-resin tse phekolehang ka UV li fana ka momahano o motle ho lisebelisoa tse fapaneng, ho kenyelletsa le li-substrates tse thata le tse tenyetsehang. Li boetse li bonts'a khanyetso e ntle ea lik'hemik'hale le thepa ea motlakase. Li-resin tse phekolehang ka UV li atisa ho sebelisoa bakeng sa li-PCB tse thata-flex, moo linako tsa ts'ebetso e potlakileng le maqhama a tšepahalang a leng bohlokoa.
F. Pressure Sensitive Adhesive (PSA): PSA ke thepa e khomarelang e etsang tlamo ha khatello e sebelisoa. Ba fana ka tharollo e bonolo, e bonolo ea ho kopanya bakeng sa li-PCB tse thata-flex. PSA e fana ka sekhomaretsi se setle libakeng tse fapaneng, ho kenyelletsa le li-substrates tse thata le tse tenyetsehang. Li lumella ho repositioning nakong ea kopano 'me li ka tlosoa habonolo ha ho hlokahala. PSA e boetse e fana ka phetoho e ntle haholo le botsitso, e etsa hore e tšoanelehe bakeng sa lits'ebetso tse hlokang ho kobeha le ho kobeha ha PCB.
Qetello:
Li-PCB tsa Rigid-flex ke karolo ea bohlokoa ea lisebelisoa tsa elektroniki tsa sejoale-joale, tse lumellang meralo e rarahaneng ea potoloho ka har'a liphutheloana tse kopaneng le tse fapaneng. Bakeng sa baenjiniere le baqapi ba ikemiselitseng ho ntlafatsa ts'ebetso le ts'epahalo ea lihlahisoa tsa elektroniki, ho bohlokoa ho utloisisa lisebelisoa tse sebelisoang moahong oa bona. Sengoliloeng sena se tsepamisitse maikutlo holim'a lisebelisoa tse sebelisoang kahong ea PCB e thata-flex, ho kenyeletsoa likarolo tse thata le tse tenyetsehang le lisebelisoa tsa sekhomaretsi. Ka ho nahana ka lintlha tse kang ho tiea, ho feto-fetoha ha maemo, ho hanyetsa mocheso le litšenyehelo, baetsi ba lisebelisoa tsa elektronike ba ka khetha thepa e nepahetseng ho latela litlhoko tsa bona tse khethehileng tsa kopo. Ebang ke FR4 bakeng sa likarolo tse thata, polyimide bakeng sa likarolo tse tenyetsehang, kapa epoxy bakeng sa bonding, thepa e 'ngoe le e' ngoe e na le karolo ea ho netefatsa ho tšoarella le ho sebetsa ha li-PCB tse thata-thata indastering ea kajeno ea elektronike e phetha karolo ea bohlokoa.
Nako ea poso: Sep-16-2023
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