Ho hlahloba Lisebelisoa tsa Boto ea PCB

Selelekela

Lefatše la liboto tsa potoloho tse hatisitsoeng (li-PCB) ke le rarahaneng le le ntseng le fetoha. Ha tlhoko ea li-PCB e ntse e eketseha, ho khetha thepa e nepahetseng ea boto ea PCB e se e le taba ea bohlokoa bakeng sa baenjiniere le baqapi. Puisanong ena e pharaletseng, re tla hlahloba mohopolo, lihlopha le lisebelisoa tse fapaneng tse sebelisoang tlhahisong ea li-PCB . Ho feta moo, re tla teba sebakeng se ikhethileng sa li-PCB tse Phahameng ka ho Fetisisa (Mocheso oa Phetoho ea Khalase), re hlahlobe bohlokoa ba tsona, melemo, litlhaloso, lits'ebetso le mabaka a ho li amohela.

Khopolo ea Lisebelisoa tsa Boto ea PCB

Liboto tsa PCB, tseo hangata ho thoeng ke li-substrates, li sebetsa e le thepa ea motheo eo lipotoloho tsa elektroniki li hahoang ho tsona. Mapolanka ana hangata a entsoe ka Copper Clad Laminate (CCL), e entsoeng ka ho kenya pampiri ea pampiri ea lehong kapa lesela la fiber ea khalase ka resin ebe e koahela lehlakore le le leng kapa ka bobeli ka foil ea koporo. CCL e eme e le lejoe la sekhutlo la indasteri ea elektroniki, e sebelisoang haholo ho etsa liboto tsa potoloho tse hatisitsoeng (PCBs) tse fumanang ts'ebeliso ea tsona lihlahisoa tse fapaneng tsa elektroniki, ho kenyeletsoa lithelevishene, seea-le-moea, likhomphutha, lisebelisoa tsa mehala le lisebelisoa tsa puisano.

Classification of PCB Board Materials

Lisebelisoa tsa boto ea PCB li arotsoe ho ipapisitsoe le lintlha tse fapaneng joalo ka Tg (Glass Transition Temperature), boemo ba kereiti, le lisebelisoa tse matlafatsang.

Tg (Mocheso oa Phetoho ea Khalase): Tg ke paramethara ea bohlokoa ha ho khethoa thepa ea PCB. E bontša mocheso oo polymer e fetang ho oona ho tloha boemong ba khalase, bo tiileng ho ea boemong bo tenyetsehang haholoanyane. Hangata baenjiniere ba beha litekanyetso tsa Tg pele, haholo-holo moelelong oa li-laminate tsa koporo tse entsoeng ka lesela la khalase tse kang FR-4. Mehlala ea litekanyetso tsa Tg e kenyelletsa tg140°C, tg160°C, le tg180°C. Lisebelisoa tse phahameng tsa Tg li ratoa bakeng sa meralo e tšepahalang haholo ka lebaka la ho hanyetsa mocheso ha tsona ho matlafalitsoeng, e leng se etsang hore Tg e be letšoao la ho hanyetsa mocheso oa boto nakong ea ho tjheseletsa loto.

Tlhophiso ea Boemo ba Kereiti: Lisebelisoa tsa boto ea PCB li arotsoe ka lihlopha tse fapaneng, ho tloha ho tse tlase ho ea ho tse phahameng:

• FR-4a1: E sebelisoa haholo sesoleng, likhokahanong, likhomphutha, lipotoloho tsa dijithale, lisebelisoa tsa indasteri le lisebelisoa tsa elektroniki tsa likoloi.
• FR-4a2: E loketse likhomphutha tsa letsatsi le letsatsi, lisebelisoa, lisebelisoa tsa lapeng tse tsoetseng pele, le lihlahisoa tse akaretsang tsa elektroniki.
• FR-4a3: E etselitsoe indasteri ea lisebelisoa tsa lapeng ka ho khetheha, lisebelisoa tsa khomphutha le lisebelisoa tse tloaelehileng tsa elektroniki. E fana ka litheko tsa tlholisano ha e ntse e fihlela litlhoko tsa ts'ebetso.
• FR-4ab Grade: E emela khetho e ikhethang, ea boemo bo tlase e nang le metrics ea ts'ebetso e ntseng e sebetsana le lisebelisoa tse tloaelehileng tsa lapeng, likhomphutha le lihlahisoa tse akaretsang tsa elektroniki. E fana ka litheko tsa tlholisano e phahameng le tekanyo e ntle haholo ea ts'ebetso-theko.
• FR-4b Kereiti: E khetholloa ka boleng bo tlase le botsitso ba boleng bo tlase. Ha e khothalletsoe bakeng sa liboto tsa potoloho ea sebaka se seholo mme hangata e sebelisoa bakeng sa lihlahisoa tse nyane (mohlala, 100mmx200mm). E fana ka theko e tlase haholo empa e hloka ho nahanoa ka hloko.
• CEM-3 Series: E fumaneha ka mebala e tšoeu, e ntšo, le ea tlhaho, haholo-holo e sebelisoang lik'homphieutha, liindasteri tsa LED, lioache, lisebelisoa tsa ntlo le lihlahisoa tse tloaelehileng tsa elektronike tse kang li-VCD, li-DVD, lipapali le mechine ea lipapali. E tsebahala ka ts'ebetso e ntle ea ho otla, e loketseng lihlahisoa tsa PCB tse phahameng tse hlokang lits'ebetso tsa ho hatakela. E fana ka maemo a mararo a boleng: A1, A2, le A3.

Lisebelisoa tsa Matlafatso: Lisebelisoa tsa boto ea PCB le tsona li arotsoe ho latela lisebelisoa tse sebelisoang bakeng sa matlafatso:

• Phenolic PCB Paper Substrate: E entsoe ka pampiri ea fiber pulp fiber e kentsoeng ka resin ea phenolic. Mefuta e fapaneng e kenyelletsa XPC, FR-1, FR-2, Fe-3, le likhetho tsa 94V0 tse thibelang malakabe.
• Composite PCB Substrate: E entsoe ka pampiri ea lehong pulp fiber kapa pampiri ea k'hothone pulp fiber e le lisebelisoa tse matlafatsang, ka lesela la fiber ea khalase joalo ka matlafatso. Hangata e sebelisa epoxy resin e thibelang mollo. E kenyelletsa fiber e nang le lehlakore le le leng la halofo ea khalase ea 22F, CEM-1 le fiber CEM-3 e mahlakoreng a mabeli.
• Fiberglass PCB Substrate: E sebelisa resin ea epoxy joalo ka sekhomaretsi le lesela la fiber ea khalase joalo ka lisebelisoa tse matlafatsang. E tsebahala ka mocheso o phahameng oa ho sebetsa le tšusumetso e fokolang ea tikoloho. Hangata e sebelisoa ho li-PCB tse mahlakoreng a mabeli, likhomphutha, li-peripherals le lisebelisoa tsa puisano.

Li-PCB tse phahameng tsa Tg - Bohlokoa le Melemo

Tlhaloso ea High Tg PCB: Li-PCB tse Phahameng tsa Tg ke tse nang le mocheso o phahameng oa phetoho ea khalase, e leng se bontšang ntlha eo thepa ea motheo (polymer kapa khalase) e fetohang ho eona ho tloha boemong bo thata, bo kang khalase ho ea boemong bo tenyetsehang haholoanyane, bo kang rabara. Phetoho ena e bohlokoa haholo, kaha e khetholla ho hanyetsa mocheso ha thepa, e netefatsa hore e lula e tiile mochesong o phahameng. Li-PCB tse Phahameng tsa Tg li bohlokoa haholo libakeng tseo li-PCB tse tloaelehileng li ka nolofatsang, tsa senya sebopeho, kapa tsa ba le phokotseho e kholo ea thepa ea mechini le ea motlakase.

Melemo ea High Tg PCB: High Tg PCBs e fana ka melemo e 'maloa:

• Botsitso bo Phahameng: Lisebelisoa tse phahameng tsa Tg li ntlafatsa ka bo eona ho hanyetsa mocheso, k'hemik'hale ea lik'hemik'hale, ho hanyetsa mongobo, le botsitso ka kakaretso ba lisebelisoa, e leng se tlatsetsang ho ts'epahalang ho ntlafetseng.
• E loketse Meralo ea Matla a Phahameng a Matla: Li-PCB tse phahameng tsa Tg li sebetsa hantle ho tsamaiseng mocheso o hlahisoang ke lisebelisoa tsa matla a phahameng, e leng se etsang hore e be tse loketseng bakeng sa lisebelisoa tse nang le mocheso o moholo oa mocheso.
• E nepahetse bakeng sa Multilayer & HDI PCBs: Li-PCB tsa Multilayer le High-Density Interconnect (HDI) hangata li hloka lisebelisoa tse phahameng tsa Tg ka lebaka la ho kopana ha tsona le potoloho e teteaneng, ho netefatsa ho tšepahala nakong ea ho etsoa.

Litlhaloso tsa High Tg PCB: Tlhaloso ea bohlokoa bakeng sa High Tg PCBs ke mocheso oa phetoho ea khalase (Tg). Hangata li-PCB tse tloaelehileng li fana ka boleng ba Tg ba 140°C, bo loketseng mocheso o sebetsang oa ho fihlela ho 110°C. Leha ho le joalo, bakeng sa lits'ebetso tsa mocheso o feteletseng tse tloaelehileng likoloing, indastering, kapa li-elektroniki tsa mocheso o phahameng, li-PCB tsa High Tg, hangata li entsoe ka thepa ea FR-4, ke khetho e khethiloeng.

Litšebeliso tsa High Tg PCB: Li-PCB tsa High Tg li fumana lits'ebetso libakeng tse fapaneng, ho kenyeletsoa:

• CAF - Conductive Anodic Filament: E sebelisoa ho thibela li-filaments tse sa rateheng ka har'a substrate ea boto ea potoloho.
• Multilayer Boards: Haholo-holo bakeng sa meralo e nang le mekhahlelo e mengata.
• Lisebelisoa tsa Elektronike tsa Indasteri: E loketse lisebelisoa tsa elektroniki tsa boemo ba indasteri.
• Motlakase oa Likoloi: E mamella maemong a mocheso o phahameng.
• Fine Line Trace Structures: E loketse meralo e rarahaneng le e kopaneng.
• Lisebelisoa tsa Elektronike tsa Mocheso o Phahameng: E bohlokoa bakeng sa lisebelisoa tsa elektroniki tse sebetsang maemong a phahameng a mocheso.

Hobaneng u Khetha High Tg PCB?

Khetho ea li-PCB tse Phahameng tsa Tg e susumetsoa ke indasteri e ntseng e fetoha ea lisebelisoa tsa elektroniki, haholo-holo lefapheng la likhomphutha tse sebetsang hantle le litlhoko tsa mekhahlelo e mengata. Ho feta moo, nts'etsopele ea Theknoloji ea Surface Mount (SMT) le Theknoloji ea Chip-on-Board (CMT) ka kopano ea PCB e nang le bongata bo boholo e hloka lisebelisoa tse nang le khanyetso e eketsehileng ea mocheso. Lisebelisoa tse Phahameng tsa Tg li ntlafatsa haholo khanyetso ea mocheso, khanyetso ea mongobo, khanyetso ea lik'hemik'hale le botsitso ka kakaretso, e leng se etsang hore li be tsa bohlokoa haholo lits'ebetsong tsa tlhahiso ea PCB e se nang loto.

Nako ea ho Khetha bakeng sa High Tg PCBs

Li-PCB tse phahameng tsa Tg li sebetsa hantle ho feta balekane ba tsona ba maemo, haholo maemong a chesang le a mongobo, li ipabola ka matla a mochini, botsitso ba sebopeho, ho khomarela, ho monya metsi le ho bola ha mocheso. Hangata bahlahisi ba khetha lisebelisoa tse phahameng tsa Tg bakeng sa li-PCB tsa lera le phahameng (haholo-holo ≥10 layers) kapa li-PCB tsa koporo tse ngata tse boima (≥3oz) ho netefatsa ho tšepahala le boleng bo phahameng. Lisebelisoa tse phahameng tsa Tg tse sebelisoang ka tloaelo li kenyelletsa ITEQ IT180, Shengyi S1000-2, le EMC EM827. Le hoja lisebelisoa tse nang le litekanyetso tsa Tg tse fetang 190 ° C kapa 210 ° C li sa tloaeleha, li teng, ka mekhoa e kang Isola FR408HR, e sebelisoang haholo-holo lits'ebetsong tsa maqhubu a phahameng, le hoja e le ka theko e phahameng ho feta thepa e tloaelehileng.

Ka kakaretso, ho utloisisa thepa ea boto ea PCB, lihlopha tsa eona, le bohlokoa ba li-PCB tse Phahameng ke habohlokoa bakeng sa baenjiniere le baqapi. Khetho ea thepa ea PCB e bapala karolo ea bohlokoa ho netefatseng botšepehi, ts'ebetso le ts'ebetso ea lihlahisoa tsa elektroniki ho pholletsa le liindasteri tse fapaneng. Ka theknoloji e fetohang ka lebelo le potlakileng, ho lula u tseba tsoelo-pele ea thepa ho bohlokoa bakeng sa ho lula u le ka pele ho moralo le tlhahiso ea PCB.

Ha projeke e fetoha ho tloha lipatlisisong ho ea ho RFQ, hlahloba tlhahlobo ea PCB le taolo ea boleng le tšehetso ea tlhahiso ea lisebelisoa tsa elektroniki e le hore litlhoko tsa thepa, ts'ebetso le tlhahlobo li lule li tsamaellana.