Pcb multi- umaleko ibhodi yesekethe abavelisi ukuba uphando lobuchwephesha kunye neqela lophuhliso, inkosi inkqubo ubugcisa obuphambili kushishino, kwaye babe nezibonelelo imveliso ethembekileyo, izibonelelo zovavanyo kunye neelebhu zomzimba kunye nemichiza nazo zonke iintlobo zemisebenzi.I-FR-4 sithetha ngayo apha lolona hlobo luxhaphakileyo lusetyenziswa kwimveliso yeebhodi zesekethe ze-pcb ezininzi.
Ingaphezulu kakhulu, eyona isetyenziswa ngokubanzi i-copper clad laminate kunye ne-prepreg kwihlabathi yi-NEMA ebizwa ngokuba yi-FR4.
malunga ne-14% yemveliso iyonke ibhodi enye okanye kabini-macala FR-4, kwaye okuseleyo malunga ne-40% yebhodi yebhodi eninzi ibhityile FR -4 laminates.Ukuphela kwembali ye-FR-4's yokulawula imarike ikakhulu ngenxa yokuba idlula kakhulu i-laminates esekelwe ephepheni kwiipropati ze-thermal, ukufuma okuphuculweyo kunye nokuxhathisa imichiza, amandla aphezulu aguquguqukayo kunye namandla amnandi amaxolo..I-FR4 yi-laminate yokuqala engasetyenziselwa i-spring-through-hole iipaneli ezinamacala amabini ngenxa yokuchasana nomswakama kunye nokukhutshwa kweekhemikhali.Ngaphezu koko, ixabiso le-FR-4 lemali alinakoyiswa.Ukutyhubela iminyaka, ishishini liye lacinga ukuba i-FR-4 iya kunika indlela kwizinto ezisanda kuphuhliswa ze-laminate ezilungele ukuxinana kwendibano ephezulu.Nangona kunjalo, ngenxa yokunyanzeliswa kweendleko, abaqulunqi beebhodi zeesekethe basafuna iindlela zokusebenzisa i-FR-4 kwiindibano eziphezulu.
Izinto zokuqinisa ezisetyenziselwa i-FR4 laminates yi-electronic glass Wib (E-glass).Ngenxa yeepropathi zayo ezilungileyo kakhulu zoomatshini, iipropathi ezanelisayo zokugquma umbane, ukumelana nobushushu, ukuxhathisa ukufuma kunye nokumelana ne-asidi, ilaphu le-E-type yeglasi yefiber ibe yinto entle kakhulu yokomeleza umbane.Onke amalaphu asetyenziswa kwi-FR4 anesakhiwo somphezulu ogudileyo ngokwendlela yokuluka ibhasikidi, kwaye umphezulu ugqunywe ngomaleko wepeyinti ukuqinisa umdibaniso phakathi kwemicu yeglasi kunye nentlaka zendalo.Ngexesha lenkqubo yokulukwa kwe-shrink, ubukhulu kunye nenani leefayili zeglasi zichongwa.Ubunzima obusisiseko kunye nobukhulu belaphu eligqityiweyo lichongiwe, ubukhulu belaphu lefayibha yeglasi elisetyenziselwa ibhodi eprintiweyo ubukhulu becala ukusuka kwi-6 ukuya kwi-172m, kwaye i-prepreg eyenziwe ngelaphu lefiber yeglasi imisela ubukhulu belaminate.Ngokuqhelekileyo, ubukhulu be-laminate ye-FR4 yi-bam ~ 1L57mm (inyuka ngezithuba ze-25pm), kwaye ubukhulu obuthile buxhomekeke kuhlobo lwelaphu lefiber yeglasi kunye nomxholo we-resin wendalo wephepha le-semi-chemical sheet elisetyenzisiweyo.Ukusebenza kwe-laminate ngokuyinhloko kunqunywe yisakhiwo, ekubeni umthengi kufuneka enze iimfuno ezinonophelo, kwaye ngenxa yobunzima obunikeziweyo, kukho izakhiwo ezininzi ezinokuhlangabezana nokunyamezela okunikiweyo.Ukwahluka kwimixholo ye-resin yendalo (ngamanye amaxesha ebizwa ngokuba ngumlinganiselo wokhuni kwi-fiberglass cloth) iya kuchaphazela iipropati ze-laminate.
Inkqubo iyonke ye-epoxy yendalo ye-resin yenziwe ngamacandelo ahlukeneyo e-epoxy asebenzayo, kunye ne-standard bifunctional epoxy natural resin (nganye yamacandelo ayo) ifunyenwe ngokudibanisa kweqela elilodwa le-epoxy kunye ne-tetrabromofluorescein A (TBPA).Kukho iikhompawundi ezimbini ze-epoxy oxygen ezisebenzayo kwikhonkco le-polymer), njengoko kubonisiwe kuMfanekiso 4.6.Ubude bekhonkco phakathi kwamaqela bumisela ukuqina kwe-laminate kunye neempawu ze-thermal ze-laminate.Ngexesha lenkqubo yokunyanga, amaqela e-oxygen epoxy asabela kunye ne-agent ephilisayo ukuze aqalise i-matrix ye-polymer ye-dimensional-dimensional.Njengenxalenye yekhonkco le-polymer, i-Wakamura bromine yongezwa kwi-TBBPA, eyenza i-TBPA ibe neempawu ezikhethekileyo zokubuyiswa komlilo.Ngokutsho kwe-Underwriters Laboratories
(Underwriters Laboratory) Uvavanyo lwe-UL94, ukuze wenze i-laminate egqityiweyo kunye nenqanaba le-V0 lokunciphisa ilangatye, kuyimfuneko yokongeza i-bromine phakathi kwe-16% kunye ne-21% ngobunzima.
Iimveliso zebhodi yesekethe ye-pcb kwibhodi yesekethe ye-multilayer igubungela iibhodi ezingama-2-28, iibhodi ze-HDI, iibhodi zobhedu eziphakamileyo ze-TG, iibhodi ezithambileyo nezinzima, iibhodi ezijikelezayo eziphezulu, i-laminates yemidiya exubeneyo, iimfama zangcwatywa ngeebhodi, ii-substrates zentsimbi kwaye akukho. Ipleyiti yeHalogen.I-advanteji yesekethe yebhasi yaseShenzhen ilele kwiintlobo ngeentlobo zemibhobho ephakathi ukuya phezulu, kwaye ixabiso lisafikeleleka kakhulu, kwaye sele likwindawo ehamba phambili kwishishini le-pcb.
Ixesha lokuposa: Aug-08-2022