Izixhobo ze-elektroniki zobuqu I-Adhesive
Ukusetyenziswa kwezinto ezincamathelayo kunye nezitywina kushishino lwezobuchwephesha ngoku kuxhaphakile kwaye azinagalelo ngokuthe ngqo ekwenziweni kweemveliso zombane kuphela kodwa nasekusebenzeni kwazo ixesha elide kunye nobomi obude. Ukusetyenziswa okukhulu kwe-adhesives kwi-electronic industry ibandakanya ukudibanisa i-surface-mount components (SMCs), i-wire tacking kunye ne-potting okanye i-encapsulating components. Isiseko sokwakhiwa kweshishini le-elektroniki yibhodi yocingo eprintiweyo okanye, njengoko kubizwa ngokuqhelekileyo, ibhodi yesekethe eprintiweyo (PCB). I-PCB isebenzisa izinto ezincamathelayo ekudibaneni amacandelo aphezu komhlaba, ukutsalwa kweengcingo, ukwambathisa ngokusesikweni kunye nakwizinto ezigqunyiweyo (zembiza).
Izigaba ezintathu ezihlukeneyo zokucwangcisa kufuneka ziqwalaselwe xa ukhetha i-adhesive ye-electronics (okanye nayiphi na enye) izicelo: isigaba esinganyangekiyo okanye i-liquid-resin-resin, isigaba sokunyanga (inguqu) kunye nesigaba esiphilisiweyo okanye esiqinileyo.
Ukusebenza kwe-adhesive ephilileyo ekugqibeleni kubaluleke kakhulu kuba kuchaphazela ukuthembeka.
Indlela yokufaka i-adhesive nayo ibaluleke kakhulu, ngokukodwa ngenxa yesidingo sokuqinisekisa ukuba isixa esichanekileyo sisetyenziswe kwindawo echanekileyo.
Iindlela eziphambili zokusebenzisa izinto zokuncamathelisa kwizicelo zombane kukuprintwa kwesikrini (ukucudisa into encamathelayo ngokusebenzisa iipateni kwiscreen), ukudluliselwa kwephini (ukusebenzisa iigridi ezincamathelayo ezininzi ezihambisa iipatheni zokuncamathelisa ebhodini) kunye nesicelo sesirinji (apho izithonga zokuncamathelisa zifakwa khona. ihanjiswe ngesirinji elawulwa ngoxinzelelo). Ukusetyenziswa kwesirinji mhlawumbi yeyona ndlela idumileyo, ngokuqhelekileyo ngendlela yeesirinji ezilawulwa nge-electro-pneumatically kwimveliso ephakathi yeentlobo ezininzi ezahlukeneyo zePCB.
Iindidi ezahlukeneyo zokuncamathelisa ziya kuqwalaselwa ngoku.
Ngokwemvelo yazo, uninzi lwezinto ezincamathelayo, zombini kunye ne-inorganic, azikho umbane. Oku kusebenza kwiintlobo eziphambili ezisetyenziswa kwizicelo ze-elektroniki ezifana ne-epoxies, i-acrylics, i-cyanoacrylates, i-silicones, i-urethane acrylates kunye ne-cyanoacrylates. Nangona kunjalo, kwizicelo ezininzi, kubandakanywa iisekethe ezidibeneyo kunye nezixhobo zokunyuka kwendawo, i-adhesives conductive conductive iyadingeka.
Indlela eqhelekileyo yokuguqula i-adhesives non-conductive adhesives kwi-conductive material conductive kukongeza i-filler efanelekileyo kwizinto ezisisiseko; ngokuqhelekileyo le yokugqibela yiresin epoxy.
Izihluzi eziqhelekileyo ezisetyenziselwa ukubonelela nge-conductivity yombane yisilivere, i-nickel kunye nekhabhoni. Isilivere yeyona isetyenziswa kakhulu. I-conductive adhesives ngokwayo i-liquid okanye i-pre-form (iifilimu ezinamathele ezomeleziweyo zifa-zinqunyulwe ngaphambi kokuba ziboshwe kwimilo efunekayo).
Kukho iintlobo ezimbini ze-adhesives conductive conductive - isotropic kunye ne-anisotropic. I-adhesives ye-Anisotropic iqhuba macala onke kodwa i-isotropic adhesive iqhuba ngokuthe nkqo (z-axis) isalathiso kuphela kwaye ngoko ke i-uni-directional.
I-adhesives ye-isotropic iboleka kunxibelelwano lwe-fine-line. Kufuneka kuqatshelwe ukuba, luncedo njengoko izinto zokuncamathelisa zinjalo, azinakuba 'zifakwe phakathi' njengezinye iindlela zokuthengisa. Azilunganga kwitoti (okanye i-tincontaining alloys) okanye ne-aluminiyam, okanye apho kukho izikhewu ezikhulu okanye apho zinokuthi zibe sesichengeni kwiimeko ezimanzi (ezifumileyo, ezifumileyo) emsebenzini.
Izinto zokuncamathelisa zombane
Ngokwemvelo yazo, uninzi lwezinto ezincamathelayo, zombini kunye ne-inorganic, azikho umbane. Oku kusebenza kwiintlobo eziphambili ezisetyenziswa kwizicelo ze-elektroniki ezifana ne-epoxies, i-acrylics, i-cyanoacrylates, i-silicones, i-urethane acrylates kunye ne-cyanoacrylates. Nangona kunjalo, kwizicelo ezininzi, kubandakanywa iisekethe ezidibeneyo kunye nezixhobo zokunyuka kwendawo, i-adhesives conductive conductive iyadingeka.
Indlela eqhelekileyo yokuguqula i-adhesives non-conductive adhesives kwi-conductive material conductive kukongeza i-filler efanelekileyo kwizinto ezisisiseko; ngokuqhelekileyo le yokugqibela yiresin epoxy.
Izihluzi eziqhelekileyo ezisetyenziselwa ukubonelela nge-conductivity yombane yisilivere, i-nickel kunye nekhabhoni. Isilivere yeyona isetyenziswa kakhulu.
I-conductive adhesives ngokwayo i-liquid okanye i-pre-form (iifilimu ezinamathele ezomeleziweyo zifa-zinqunyulwe ngaphambi kokuba ziboshwe kwimilo efunekayo).
Kukho iintlobo ezimbini ze-adhesives conductive conductive - isotropic kunye ne-anisotropic. I-adhesives ye-Anisotropic iqhuba macala onke kodwa i-isotropic adhesive iqhuba ngokuthe nkqo (z-axis) isalathiso kuphela kwaye ngoko ke i-uni-directional.
I-adhesives ye-isotropic iboleka kunxibelelwano lwe-fine-line. Kufuneka kuqatshelwe ukuba, luncedo njengoko izinto zokuncamathelisa zinjalo, azinakuba 'zifakwe phakathi' njengezinye iindlela zokuthengisa. Azilunganga kwitoti (okanye i-tincontaining alloys) okanye ne-aluminiyam, okanye apho kukho izikhewu ezikhulu okanye apho zinokuthi zibe sesichengeni kwiimeko ezimanzi (ezifumileyo, ezifumileyo) emsebenzini.
I-adhesives conductive thermally
I-Miniaturization ye-electronic circuitry ingabangela iingxaki zokunyuka kobushushu, ezinokubangela ukusilela kwangaphambi kwexesha kumacandelo e-elektroniki ukuba ubushushu bawo bokusebenza bugqithile. I-adhesive conductive thermally conductive ingasetyenziselwa ukubonelela ngendlela yokuhambisa ukushisa, i-fastening transistors, i-diodes okanye ezinye izixhobo zamandla kwiindawo ezifanelekileyo zokushisa ukushisa ukuqinisekisa ukuba ukufudumala okunjalo akwenzeki.
I-Metallic (i-electrically conductive) okanye i-non-metallic (i-insulating) i-powders idityaniswe kwi-adhesive formulation yokwenza i-high-viscosity (i-paste) i-adhesives, ehamba phambili kakhulu ye-therrmally (ngokuthelekiswa ne-adhesives engagcwaliswanga). Iinkqubo eziqhelekileyo ze-thermal conductive zenziwe nge-epoxy, i-silicone kunye ne-acrylics.
I-adhesives yokunyanga i-ultraviolet
Izincamathelisi zokunyanga ukukhanya, ii-coatings kunye ne-encapsulants zisetyenziswa kwishishini lokuvelisa i-electronics ngokunyuka rhoqo ngenxa yokuba zihlangabezana neemfuno zemathiriyeli kunye nokucubungula ngaphakathi kolu shishino. Ezo zinto zibandakanya iimfuno zokusingqongileyo (izinyibilikisi ezonakalisa indalo kunye nezongezo azifunwa), ukuphuculwa kwemveliso-yesivuno kunye neendleko zemveliso. Izincamathelisi zokunyanga ukukhanya kulula ukuzisebenzisa, kwaye zinyangwa ngokukhawuleza ngaphandle kwesidingo sokunyanga ubushushu obuphakamileyo.
I-adhesives ngokuqhelekileyo i-acrylic-based formulations kwaye iqulethe i-photo-initiators ethi, xa iqhutywe yimitha ye-ultraviolet, yenza i-radicals yamahhala ukuqalisa inkqubo yokwenza i-polymer (ukunyanga). Ukukhanya kwe-Ultraviolet kufuneka kukwazi ukungena kwi-resin enganyangekiyo - i-drawback ye-adhesives lightcuring. Iidiphozithi zentlaka ezinombala omnyama, ezingafikelelekiyo okanye ezityebileyo kunzima ukunyangeka.
