FR4 vs. Polyimide: Yeyiphi imathiriyeli efanelekileyo kwiisekethe eziguquguqukayo?

Kule bhlog, siza kuphonononga umahluko phakathi kwe-FR4 kunye nezixhobo ze-polyimide kunye nefuthe labo kuyilo lwesekethe ye-flex kunye nokusebenza.

Iisekethe eziguquguqukayo, ezikwaziwa ngokuba ziisekethe eziprintiweyo eziguquguqukayo (FPC), ziye zaba yinxalenye yombane wale mihla ngenxa yokukwazi ukugoba kunye nokujija. Ezi sekethe zisetyenziswa ngokubanzi kwizicelo ezinje ngee-smartphones, izixhobo ezinxitywayo, ii-elektroniki zemoto, kunye nezixhobo zonyango. Izinto ezisetyenziselwa ukuveliswa kweesekethe eziguquguqukayo zidlala indima ebalulekileyo ekusebenzeni kunye nokusebenza kwazo. Izinto ezimbini eziqhelekileyo ezisetyenziswa kwiisekethe eziguquguqukayo ziyi-FR4 kunye ne-polyimide.

I-FR4 imele iFlame Retardant 4 kwaye yifiberglass eyomeleziweyo epoxy laminate. Isetyenziswa ngokubanzi njengento esisiseko kwiibhodi zesekethe eziprintiweyo eziqinileyo (PCBs).Nangona kunjalo, i-FR4 inokusetyenziswa kwiisekethe eziguquguqukayo, nangona imida. Iinzuzo eziphambili ze-FR4 zinamandla omatshini aphezulu kunye nokuzinza, okwenza ukuba zilungele izicelo apho ukuqina kubalulekile. Ikwangabizi kakhulu xa kuthelekiswa nezinye izinto ezisetyenziswa kwiisekethe eziguquguqukayo. I-FR4 ineempawu ezigqwesileyo zokufakelwa kombane kunye nokumelana nobushushu obuphezulu. Nangona kunjalo, ngenxa yokuqina kwayo, ayinakuguquguquka njengezinye izinto ezifana ne-polyimide.

I-Polyimide, kwelinye icala, i-polymer ephezulu yokusebenza enikezela ukuguquguquka okukhethekileyo. Yimpahla ye-thermoset enokumelana nokushisa okuphezulu kwaye ifanelekile kwizicelo ezifuna ukuxhathisa ukushisa.I-Polyimide ihlala ikhethwa ukuba isetyenziswe kwiisekethe eziguquguqukayo ngenxa yokuguquguquka okugqwesileyo kunye nokuqina. Inokugotywa, ijikwe kwaye isongwe ngaphandle kokuchaphazela ukusebenza kwesekethe. I-Polyimide nayo ineempawu ezilungileyo zokugquma umbane kunye ne-dielectric engaguqukiyo ephantsi, enenzuzo kwizicelo ze-high-frequency applications. Nangona kunjalo, i-polyimide ibiza kakhulu kune-FR4 kwaye amandla ayo omatshini anokuba ngaphantsi xa kuthelekiswa.

Zombini i-FR4 kunye ne-polyimide zineenzuzo zazo kunye nezithintelo xa kuziwa kwiinkqubo zokuvelisa.I-FR4 idla ngokuveliswa kusetyenziswa inkqubo yokuthabatha apho ukodlula ubhedu kubekwa kude ukwenza ipateni yesekethe efunekayo. Le nkqubo ivuthiwe kwaye isetyenziswa ngokubanzi kushishino lwePCB. I-Polyimide, kwelinye icala, iqhele ukwenziwa kusetyenziswa inkqubo yokongeza, ebandakanya ukubeka iileya ezibhityileyo zobhedu kwi-substrate yokwakha iipateni zesekethe. Inkqubo yenza ukuba kulandele umkhondo we-conductor ocolekileyo kunye nezithuba ezingqongqo, iyenze ilungele ukuxinana okuphezulu kweesekethe eziguquguqukayo.

Ngokumalunga nokusebenza, ukhetho phakathi kwe-FR4 kunye ne-polyimide kuxhomekeke kwiimfuno ezithile zesicelo.I-FR4 ifanelekile kwizicelo apho ukuqina kunye namandla omatshini kubaluleke kakhulu, njenge-automotive electronics. Inozinzo oluhle lwe-thermal kwaye inokumelana neendawo zokushisa eziphezulu. Nangona kunjalo, ukuguquguquka kwayo okulinganiselweyo kusenokungalungeli izicelo ezifuna ukugoba okanye ukugoba, njengezixhobo ezinxitywayo. I-Polyimide, ngakolunye uhlangothi, igqwesa kwizicelo ezifuna ukuguquguquka kunye nokuqina. Ukukwazi kwayo ukumelana nokugoba okuphindaphindiweyo kuyenza ibe yinto efanelekileyo kwizicelo ezibandakanya intshukumo eqhubekayo okanye ukungcangcazela, njengezixhobo zonyango kunye ne-aerospace electronics.

Isishwankathelo, ukhetho lwe-FR4 kunye nezixhobo ze-polyimide kwiisekethe eziguquguqukayo zixhomekeke kwiimfuno ezithile zesicelo.I-FR4 inamandla omatshini aphezulu kunye nokuzinza, kodwa ukuguquguquka okuncinci. I-Polyimide, kwelinye icala, ibonelela ngokuguquguquka okuphezulu kunye nokuqina kodwa inokubiza kakhulu. Ukuqonda umahluko phakathi kwezi zixhobo kubalulekile ekuyileni nasekuveliseni iisekethe eziguquguqukayo ezihlangabezana nokusebenza okufunekayo kunye nokusebenza. Nokuba yi-smartphone, iyanxitywa okanye isixhobo sonyango, ukukhetha izixhobo ezifanelekileyo kubalulekile kwimpumelelo yeesekethe eziguquguqukayo.