Yintoni umahluko phakathi kwe-FR4 kunye ne-polyimide?

intshayelelo

Ukusebenza kunye nokuthembeka kwemveliso egqityiweyo kuphenjelelwa kakhulu kwizinto ezisetyenziselwa ukwenza i-electronics kunye neebhodi zeesekethe. Kuba yonke imathiriyeli iyonwabela izibonelelo zayo kunye nokungalunganga, i-FR4 kunye ne-polyimide ziyahlukana njengee substrates ezaziwayo phakathi kokhetho oluninzi. Ukuze kwenziwe izigqibo ezihambelana neemfuno ezithile zezicelo zabo, iinjineli kunye nabayili abajonga le mbonakalo yomhlaba kufuneka baqaphele umahluko okhoyo phakathi kwe-polyimide kunye ne-FR4.

I-FR4, ebizwa ngokuba yi -FR4 epoxy board , yinto edityanisiweyo eyenziwe kusetyenziswa umphezulu we-fiberglass olukiweyo ofakwe i-epoxy sap, idume ngeempawu zayo ezintle zoomatshini kunye nokuqonda iindleko. Ngenxa yokhuseleko lwayo olumangalisayo lombane, ukhuseleko olunemigangatho, kunye nokulula kwemveliso, isebenza njengesiseko esisemgangathweni kwishishini lezixhobo. Ngenxa yezi mpawu, i-FR4 epoxy board ifanelekile kwizicelo ezininzi, kubandakanya iibhodi zesekethe eziprintiweyo (ii-PCB), apho ukusebenza kunye nokuthembeka kwiimeko ezahlukeneyo kubalulekile.

I-Polyimide, kwelinye icala, ivela njengebambela elixhaphakileyo lokubulawa elinokuthembeka okufudumeleyo kwenoveli, umqobo obambekayo, kunye namandla omatshini. Iifilimu zePolyimide zikhuselekile kakhulu kubushushu kwaye ziveliswa kusetyenziswa iidiamines ezinevumba elimnandi kunye ne-dianhidrides. Zinkulu kwizicelo ezifuna ukuguquguquka kwaye kulula ukuphuhlisa. IiPoliimides zingundoqo kwizenzo ezifana nokubhabha, inqwelo-mafutha, kunye nezixhobo zonyango apho iimfuneko zokubulawa zisongamela ngenxa yokukwazi kwazo ukungena kumaqondo obushushu angaqhelekanga kunye neemeko ezingaxoleliyo.

Isicwangciso somdlalo, iipropati, usetyenziso, kunye namacandelo okuqwalasela ngelixa ukhetha ibhodi ye-FR4 epoxy kunye ne-polyimide substrates zixoxiwe ngokuqhubekayo kweli nqaku. Ngokuhlola ngokupheleleyo ezi zinto ziguquguqukayo, iingcali kunye nabayili bezakhiwo banokuphonononga ngokulula ukuntsonkotha kokuzimisela kwezinto, beqinisekisa ukuba izicwangciso zabo ze-elektroniki ziya kwenza konke okusemandleni abo kwaye zithembeke.

Zeziphi iimpawu eziphambili zeFR4 epoxy?

Uhlobo lwe-epoxy laminate eqiniswe ngeglasi eyaziwa ngokuba yi-FR4, okanye i-Flame Retardant 4, i-epoxy, lusetyenziswa rhoqo ekuveliseni iibhodi zesekethe eziprintiweyo (ii-PCB). Ukuthandwa kwayo kungenxa yokuxhathisa kwayo kumswakama kunye neekhemikhali, amandla oomatshini, uzinzo olulinganayo, kunye neempawu zokufakelwa kombane ezibalaseleyo. Uvavanyo lweempawu eziphambili ezenza i-FR4 epoxy ibe lukhetho olukhethwayo kwizicelo ezininzi lubonelelwe apha.

Isigqubuthelo se-epoxy se-FR4 siquka isiseko seglasi elukiweyo yokuthungwa okomeleziweyo kunye nentlaka ye-epoxy. Esi sixhobo sigcina ukugquma kombane okugqwesileyo ngelixa sisabonelela ngamandla omatshini. Inkxaso yeglasi ngokunjalo inika ukuqina okuthe tyaba kwizinto eziphathekayo, iqinisekisa ukuba ii-PCB zihlala zikumgangatho kwaye zizinzile kakhulu phantsi kokutshintsha kwamaqondo obushushu kunye namanqanaba e-mugginess.

I-flame retadancy ye-FR4 epoxy yenye yezona zinto zibalulekileyo. Iyanelisa izikhokelo zempilo eyomeleleyo yezixhobo zombane ngokuchasa ukuvutha kunye nokuthintela ukusasazeka kwamadangatye, okubaluleke kakhulu ekuthinteleni imililo ebangelwa kukushokoxeka kombane.

Ngokubhekiselele ekusebenzeni kombane, i-FR4 epoxy inomlinganiselo ophantsi wokulahla kunye namandla aphezulu e-dielectric, okwenza ukuba ifaneleke usetyenziso apho ukuxhomekeka kombane kunye nokunyaniseka komqondiso kubalulekile. Iimpawu zayo zokushisa zenza ukuba kube lula ukukhupha ukushisa, okubalulekileyo kwi-electronics, apho ulawulo lobushushu lubalulekile ekusebenzeni kwesixhobo kunye nokuphila ixesha elide.

Lilonke, i-FR4 epoxy sisixhobo esisebenza ngeendlela ezahlukeneyo kwiinkqubo ezahlukeneyo zePCB, kubandakanya i-elektroniki yabathengi, i-aerospace, kunye neemoto. Idibanisa ukomelela koomatshini, ukugqunyelelwa kombane okugqwesileyo, ukubuyiswa komlilo, kunye nokuzinza kwe-thermal.

I-FR4 epoxy ithelekisa njani nezinye izixhobo zePCB ngokweendleko-zokusebenza?

Kunye nokuthembeka nokusebenza kakuhle, ukusebenza kakuhle kweendleko yeyona nto ibalulekileyo xa kukhethwa izinto zokwenziwa kwePCB. I-FR4 epoxy yaziwa ngokufumana uhlobo oluthile lokuvisisana phakathi kokuqiqa nokusebenza, nto leyo eyenza ukuba ibe yenye yezona zinto zibandakanyeka kakhulu kwishishini.

Kukho izizathu ezininzi zokuba kutheni i-FR4 epoxy ifikeleleke. Okokuqala, xa kuthelekiswa nezinto ezingaqhelekanga ezifana ne-polyimide, izinto zayo eziluhlaza-i-epoxy resin kunye nelaphu leglasi-azibizi kakhulu. Kubavelisi be-PCB, oku kufikeleleka kukhokelela kwiindleko ezisezantsi zemveliso, enokuthi ibe ngumba ogqibayo, ngakumbi kwiimeko ezibandakanya umthamo omkhulu wemveliso.

Ukongezelela, iinkqubo zokwenziwa kakuhle kunye neziphuculweyo ze-FR4 epoxy ziye zanciphisa iindleko zemveliso kunye namaxesha okukhokela. Ukuze kuhlangatyezwane nokulindelwe ngabathengi kunye nemigangatho yoshishino, ukulinganisa iindlela zokuyila kubalulekile. Ukuhambelana kumgangatho kunye nokuthembeka kuqinisekisiwe.

Ukukhululeka kokuphatha kunye nokucubungula i-FR4 epoxy igalelo ekusebenzeni kwayo kweendleko ukusuka kumbono woyilo. Izixhobo eziqhelekileyo ze-PCB zokuvelisa kunye neendlela zenza kube lula umatshini, u-drill, kunye nokudibanisa, ukunciphisa imfuno yeenkqubo ezikhethekileyo okanye izixhobo ezinokunyusa iindleko zemveliso.

Ngokubanzi, nangona iindleko zeBhodi ye -FR4 Epoxy zixhomekeke kwizinto ezifana nobungakanani bebhodi, ubunzima, kunye nobungakanani bokwenziwa kwayo, ihlala iyinto ebalulekileyo kwezinye izicelo ngenxa yokubonakaliswa kwayo okufanelekileyo kunye nengqiqo xa kuthelekiswa nezixhobo ezikhethiweyo.

Zeziphi iimpawu ezizodwa kunye nokusetyenziswa kwe-polyimide kwizinto zombane?

I-Polyimide, ekwabizwa ngokuba yiKapton®, yipolymer esebenza ngeendlela ezininzi edume ngokuxhathisa okukhethekileyo kweekhemikhali, amandla oomatshini, kunye nozinzo lobushushu. Ezi zakhiwo zilandela i-polyimide isigqibo esithandwayo kwizicelo apho amaqondo obushushu agqithisileyo, iimeko ezikhohlakeleyo, kunye nezinto ezifunekayo zokubulawa zixhaphakile.

Uzinzo lwe-thermal yePolyimide yenye yezona mpawu zayo ezahlukileyo. Ilungele ukusetyenziswa kwi-aerospace, i-automotive, kunye necandelo lezoshishino apho ubushushu obugqithisileyo buxhaphake ngenxa yokuba inokusebenza ngokuqhubekayo kumaqondo obushushu ukusuka kwi -269 ° C ukuya ngaphezulu kwe-400 ° C ngaphandle kokuwohloka kakhulu.

Ngaphandle kokuthembeka okufudumeleyo, i-polyimide ibonisa iimpawu ezimangalisayo zoomatshini, kubandakanywa ukuqina okuphezulu kunye nemodulus, kunye nokukhuselwa kwindawo ekrweliweyo kunye nokukrazuka. Ezi zakhiwo zenza ukuba kube nengqiqo kwiiPCB eziguquguqukayo, izifudumezi eziguquguqukayo, iimuvi ezikhuselayo, kunye nezicelo ezahlukeneyo apho amandla omatshini asisiseko.

I-Polyimide nayo inokumelana nekhemikhali egqwesileyo, igcina ingqibelelo yayo phambi kobuninzi be-asidi kunye neziseko, izinyibilikisi, i-oyile, kunye nezinye izinto. Ngenxa yokungangeni kweekhemikhali, inokusetyenziswa kwiindawo ezirhabaxa apho izinto eziqhelekileyo zinokusilela.

Kwiigajethi, i-polyimide ilandelela phantsi ukusetyenziswa kwiisekethe eziguquguqukayo (ii-PCB eziguquguqukayo), apho ukuguquguquka kwayo, indalo ekhaphukhaphu, kunye nokuthintelwa kobushushu obuphezulu kuxhobisa izicwangciso ezincitshisiweyo nezithembekileyo. Ikwasetyenziswa ngokunjalo njengento ekhuselayo kwihardware ephindaphindekayo nanjengesigqubuthelo esikhuselayo sezixhobo ze-elektroniki ezivezwe kwiimeko ezimanyumnyezi.

Ngelixa i-polyimide ibonelela ngokusetyenziswa okuxhaphakileyo kwizicelo ezingacacanga, iindleko zayo ezinkulu xa zithelekiswa ne-FR4 epoxy kunye nezinto eziyimfuneko zokuhlanganisa ezintsonkothileyo zinokuthintela ulwamkelo olungenamda, ngakumbi kwiigajethi zabathengi ezixabisa iindleko.

isiphelo

Ukuqukumbela, isigqibo phakathi kwe-polyimide kunye ne -FR4 epoxy sixhomekeke kwiimfuno ezithile zesicelo, ukulinganisela ukusebenza, iindleko, kunye neemeko zokusingqongileyo. Uluhlu olubanzi lwezicelo ze-PCB lunokuxhamla kukuguquguquka kwe-FR4 epoxy, ukusebenza kakuhle kweendleko, kunye nokulula kokuveliswa. Kwelinye icala, i-Polyimide igqwesile kwiindawo ezifuna kakhulu apho ukumelana neekhemikhali, amandla oomatshini, kunye nokuzinza kobushushu kubalulekile. Iinjineli kunye nabayili banokwenza izigqibo ezinolwazi olupheleleyo zokuphucula ukusebenza kunye nokuthembeka kwezixhobo ze-elektroniki kunye neenkqubo ngokuqonda iimpawu ezahlukeneyo kunye nokusetyenziswa kwento nganye.