Lisebelisoa tsa Elektronike tsa Motho E khotsofatsa
Tšebeliso ea li-adhesives le sealants indastering ea lisebelisoa tsa elektronike e se e jele setsi 'me ha e fane ka letsoho ka ho toba feela tlhahisong ea lihlahisoa tsa elektronike empa hape le ts'ebetsong ea bona ea nako e telele le bophelo bo bolelele. Ts'ebeliso e kholo ea likhomaretsi indastering ea elektroniki e kenyelletsa bonding ea likarolo tse holim'a holim'a metsi (SMCs), ho roala terata le lipitsa kapa likarolo tsa encapsulating. Mohaho oa motheo oa indasteri ea lisebelisoa tsa elektronike ke boto e hatisitsoeng ea lithapo kapa, joalo ka ha ho tloaelehile ho bitsoa, boto ea potoloho e hatisitsoeng (PCB). PCB e sebelisa lisebelisoa tsa sekhomaretsi ho kopanya likarolo tse holim'a holim'a thaba, ho tlama ka terata, ho roala ka mokhoa o ts'oanang le ho kenya likarolo (potting).
Mehato e meraro e fapaneng ea ts'ebetso e tlameha ho nahanoa ha ho khethoa sekhomaretsi bakeng sa lits'ebetso tsa elektroniki (kapa tse ling): karolo e sa phekolehang kapa ea metsi-resin, mohato oa ho folisa (oa nakoana) le mohato o folisitsoeng kapa o tiileng.
Ts'ebetso ea sekhomaretsi se phekotsoeng qetellong ke ea bohlokoa ka ho fetisisa hobane e ama ho ts'epahala.
Mokhoa oa ho sebelisa sekhomaretsi o boetse oa bohlokoa haholo, haholo-holo ka lebaka la tlhokahalo ea ho netefatsa hore chelete e nepahetseng e sebelisoa sebakeng se nepahetseng.
Mekhoa e meholo ea ho sebelisa likhomaretsi lits'ebetsong tsa elektroniki ke ho hatisa skrineng (ho petetsa sekhomaretsi ka lipaterone skrineng), phetisetso ea likhomaretsi (ho sebelisa li-grids tse nang le li-multi-pin tse fetisang lipaterone tsa marotholi a sekhomaretsi botong) le syringe (eo ho eona ho nang le lithunya tsa sekhomaretsi). e fanoang ka seringe se laoloang ke khatello). Ho sebelisa syringe mohlomong ke mokhoa o tsebahalang haholo, hangata ka mokhoa oa li-syringe tse laoloang ke electro-pneumatically bakeng sa tlhahiso e itekanetseng ea mefuta e mengata e fapaneng ea PCB.
Hona joale ho tla shejoa mefuta e fapaneng ea sekhomaretsi.
Ka tlhaho ea bona, li-adhesives tse ngata, tse phelang le tse sa tloaelehang, ha li tsamaise motlakase. Sena se sebetsa mefuteng ea mantlha e sebelisoang lits'ebetsong tsa elektroniki tse kang epoxies, acrylics, cyanoacrylates, silicones, urethane acrylates le cyanoacrylates. Leha ho le joalo, lits'ebetsong tse ngata, ho kenyeletsoa lipotoloho tse kopaneng le lisebelisoa tse holim'a metsi, li-adhesives tse tsamaisang motlakase lia hlokahala.
Mokhoa o tloaelehileng oa ho fetola li-adhesives tse se nang conductive ho lisebelisoa tse tsamaisang motlakase ke ho eketsa li-filler tse loketseng thepa ea motheo; hangata ea ho qetela ke epoxy resin.
Li-filler tse sebelisoang ho fana ka conductivity ea motlakase ke silevera, nickel le carbon. Silevera ke eona e sebelisoang ka ho fetisisa. Likhomaretsi tsa conductive ka botsona li na le mokelikeli kapa li-pre-form (lifilimi tsa likhomaretsi tse matlafalitsoeng li shoa pele li tlamahanngoa le sebopeho se hlokahalang).
Ho na le mefuta e 'meli ea likhomaretsi tse tsamaisang motlakase - isotropic le anisotropic. Likhomaretsi tsa anisotropic li tsamaea ka mahlakoreng 'ohle empa sekhomaretsi sa isotropic se tsamaisa ka lehlakoreng le otlolohileng (z-axis) ka tsela e le 'ngoe feela.
Likhomaretsi tsa isotropic li ikakhela ka setotsoana ho khokahanyo ea mela e metle. Ho lokela ho hlokomeloa hore, joalo ka ha likhomaretsi tsa conductive li le molemo, li ke ke tsa 'khelloa ka hare' joalo ka mefuta e meng ea solder. Ha li ntle ka thini (kapa li-alloys tse nang le tincontaining) kapa ka aluminium, kapa moo ho nang le likheo tse kholo kapa moo ho ka etsahalang hore li pepesehetse maemo a mongobo (a mongobo, a mongobo) ts'ebetsong.
Likhomaretsi tse tsamaisang motlakase
Ka tlhaho ea bona, li-adhesives tse ngata, tse phelang le tse sa tloaelehang, ha li tsamaise motlakase. Sena se sebetsa mefuteng ea mantlha e sebelisoang lits'ebetsong tsa elektroniki tse kang epoxies, acrylics, cyanoacrylates, silicones, urethane acrylates le cyanoacrylates. Leha ho le joalo, lits'ebetsong tse ngata, ho kenyeletsoa lipotoloho tse kopaneng le lisebelisoa tse holim'a metsi, li-adhesives tse tsamaisang motlakase lia hlokahala.
Mokhoa o tloaelehileng oa ho fetola li-adhesives tse se nang conductive ho lisebelisoa tse tsamaisang motlakase ke ho eketsa li-filler tse loketseng thepa ea motheo; hangata ea ho qetela ke epoxy resin.
Li-filler tse sebelisoang ho fana ka conductivity ea motlakase ke silevera, nickel le carbon. Silevera ke eona e sebelisoang ka ho fetisisa.
Likhomaretsi tsa conductive ka botsona li na le mokelikeli kapa li-pre-form (lifilimi tsa likhomaretsi tse matlafalitsoeng li shoa pele li tlamahanngoa le sebopeho se hlokahalang).
Ho na le mefuta e 'meli ea likhomaretsi tse tsamaisang motlakase - isotropic le anisotropic. Likhomaretsi tsa anisotropic li tsamaea ka mahlakoreng 'ohle empa sekhomaretsi sa isotropic se tsamaisa ka lehlakoreng le otlolohileng (z-axis) ka tsela e le 'ngoe feela.
Likhomaretsi tsa isotropic li ikakhela ka setotsoana ho khokahanyo ea mela e metle. Ho lokela ho hlokomeloa hore, joalo ka ha likhomaretsi tsa conductive li le molemo, li ke ke tsa 'khelloa ka hare' joalo ka mefuta e meng ea solder. Ha li ntle ka thini (kapa li-alloys tse nang le tincontaining) kapa ka aluminium, kapa moo ho nang le likheo tse kholo kapa moo ho ka etsahalang hore li pepesehetse maemo a mongobo (a mongobo, a mongobo) ts'ebetsong.
Likhomaretsi tse tsamaisang mocheso
Miniaturization ea potoloho ea elektronike e ka baka mathata a ho haha mocheso, a ka bakang ho hlōleha pele ho nako ea likarolo tsa elektronike haeba mocheso oa bona o phahameng oa ho sebetsa o feta. Sekhomaretsi se tsamaisang mocheso se ka sebelisoa ho fana ka tsela e tsamaisang mocheso, ho fastening transistors, diode kapa lisebelisoa tse ling tsa matla ho lithapo tse loketseng tsa mocheso ho netefatsa hore mocheso o joalo ha o etsahale.
Metallic (electrically conductive) kapa non-metallic (insulating) powders li kopantsoe ka mokhoa oa sekhomaretsi ho etsa li-adhesives tse phahameng tsa viscosity (peista), tse nang le mocheso o phahameng haholo (ha o bapisoa le li-adhesive tse sa tlatsoang). Mekhoa e tloaelehileng ka ho fetisisa ea thermally conductive e entsoe ka epoxy, silicone le acrylics.
Likhomaretsi tse phekolang ka ultraviolet
Li-adhesives, li-coatings le li-encapsulants li sebelisoa indastering ea tlhahiso ea lisebelisoa tsa elektronike ka makhetlo a mangata hobane li finyella litlhoko tsa thepa le ho sebetsa ka har'a indasteri ena. Lintlha tseo li kenyelletsa litlhoko tsa tikoloho (litlhapi tse senyang tikoloho le li-additives ha li hlokehe), ntlafatso ea tlhahiso ea lihlahisoa le litšenyehelo tsa sehlahisoa. Likhomaretsi tse folisang khanya li bonolo ho li sebelisa, 'me li phekoleha kapele ntle le tlhoko ea pholiso e phahameng ea mocheso.
Likhomaretsi hangata ke libopeho tse thehiloeng ho acrylic 'me li na le li-photo-initiators tseo, ha li sebelisoa ke mahlaseli a ultraviolet, li theha li-radicals tsa mahala ho qala mokhoa oa ho etsa polymer (pholiso). Leseli la ultraviolet le tlameha ho khona ho kenella ka har'a resin e sa phekolehang - tšitiso ea li-adhesives tse khantšang. Li-deposit tsa resin tse 'mala o lefifi, tse sa fihlelleheng kapa tse teteaneng haholo ho thata ho li phekola.
