Ihiganwa rya PCB

Pcb ibice byinshi byumuzunguruko wumuzunguruko ufite itsinda ryubushakashatsi bwubuhanga nubuhanga mu iterambere, bayobora ikoranabuhanga ryateye imbere mu nganda, kandi bafite ibikoresho byizewe byizewe, ibikoresho byo gupima na laboratoire yumubiri na chimique hamwe nibikorwa byose.FR-4 tuvuga hano ni ubwoko bwimpapuro zikoreshwa cyane mugukora pcb nyinshi zumuzunguruko.
Byimbere cyane, bikoreshwa cyane mumuringa wambaye laminate na prepreg kwisi ni NEMA yitwa FR4
hafi 14% yumusaruro wose ni uruhande rumwe cyangwa impande ebyiri FR-4, naho ibisigaye hafi 40% byubuyobozi bwinshi ni buke FR -4 laminates.Iherezo ryamateka ya FR-4′s yiganje kumasoko ahanini biterwa nuko irenze cyane laminate ishingiye kumpapuro mumiterere yubushyuhe, kunoza ubuhehere no kurwanya imiti, imbaraga zoroshye kandi imbaraga zishishwa..FR4 niyo laminate yambere ishobora gukoreshwa mumasoko-anyuze mu mwobo impande zombi kubera ko irwanya ubushuhe hamwe na exfolisiyonike.Byongeye, agaciro FR-4′s kumafaranga ntagereranywa.Mu myaka yashize, inganda zafashe icyemezo ko FR-4 izaha inzira ibikoresho bishya bya laminate bikwiranye n’ubucucike bukabije.Ariko, kubera imbogamizi zibiciro, abashushanya inama yumuzunguruko baracyashakisha uburyo bwo gukoresha FR-4 mumateraniro yuzuye.
Ibikoresho bishimangira gukoreshwa kuri FR4 laminates ni ikirahuri cya elegitoroniki Wib (E-ikirahure).Kubera imiterere yihariye yubukanishi, imiterere ishimishije yumuriro wamashanyarazi, kurwanya ubushyuhe, kurwanya ubushuhe no kurwanya aside, imyenda yo mu bwoko bwa E yo mu kirahure yahindutse ibikoresho byiza byongera amashanyarazi.Imyenda yose ikoreshwa muri FR4 ifite imiterere yubuso buringaniye ukurikije uburyo bwo kuboha igitebo, kandi ubuso busize irangi ryirangi kugirango bishimangire guhuza fibre yibirahure nibisigara bisanzwe.Mugihe cyo kugabanuka kuboha, ubunini bwumubare numubare wibirahure byamenyekanye.Uburemere bwibanze nubunini bwimyenda irangiye bigenwa, ubunini bwimyenda ya fibre yikirahure ikoreshwa kubibaho byacapwe ahanini kuva kuri 6 kugeza kuri 172m, naho prereg igizwe nigitambara cya fibre yikirahure igena ubunini bwa laminate.Mubisanzwe, ubunini bwa laminate ya FR4 ni bam ~ 1L57mm (kwiyongera mugihe cya 25h00), kandi ubunini bwihariye buterwa nubwoko bwimyenda ya fibre fibre hamwe nibisigara bisanzwe byurupapuro rwimiti ikoreshwa.Imikorere ya laminate igenwa cyane cyane nimiterere, kubera ko umuguzi agomba gukora ibisabwa yitonze, kandi kubwubugari bwatanzwe, hariho inzego nyinshi zishobora guhura nubworoherane bwatanzwe.Guhindagurika mubintu bisanzwe bya resin (rimwe na rimwe byitwa igipimo cyibiti nigitambara cya fiberglass) bizagira ingaruka kumiterere ya laminate.
Sisitemu rusange ya epoxy naturel isanzwe igizwe nibintu bitandukanye bikora epoxy ikora, kandi ibisanzwe bisanzwe bya epoxy isanzwe (buri kimwe mubigize) iboneka binyuze muguhuza itsinda rimwe rya epoxy na tetrabromofluorescein A (TBPA).Hariho ibice bibiri byitwa epoxy ogisijeni yibintu kuri polymer), nkuko bigaragara ku gishushanyo 4.6.Uburebure bwurunigi hagati yitsinda bugena ubukana bwa laminate hamwe nubushyuhe bwumuriro wa laminate.Mugihe cyo gukira, amatsinda ya ogisijeni ya epoxy yitwara hamwe nu muti wo gukiza kugirango atangire materix ya polimeri-itatu.Nkigice cyurunigi rwa polymer, bromine ya Wakamura yongewe kuri TBBPA, ituma TBPA ifite imiterere yihariye ya flame retardant.Nk’uko Laboratoire Yandika
(Underwriters Laboratory) Ikizamini cya UL94, kugirango ukore laminate yarangiye hamwe na V0 urwego rwo kutagira umuriro, birakenewe kongeramo bromine hagati ya 16% na 21% kuburemere.
Ibicuruzwa byumuzunguruko wa pcb mubicuruzwa byubuyobozi bwumuzunguruko wa pcb bitwikiriye imbaho ​​2-28, imbaho ​​za HDI, imbaho ​​ndende za TG zuzuye umuringa, imbaho ​​zoroshye kandi zikomeye, imbaho ​​zikoreshwa cyane, itangazamakuru rivanze na laminates, impumyi zashyinguwe hakoreshejwe imbaho, ibyuma byubatswe kandi oya Isahani ya Halogen.Ibyiza bya bisi ya bisi ya Shenzhen iri mubice bitandukanye hagati-hejuru-yohejuru, kandi igiciro kiracyahendutse cyane, kandi kimaze kuba kumwanya wambere mubikorwa bya pcb.