Abakhiqizi bebhodi lesekethe le-Pcb elinezingqimba eziningi banethimba lochwepheshe lokucwaninga nokuthuthukiswa kwezobuchwepheshe, banolwazi olunzulu lwenqubo yobuchwepheshe bemboni, futhi banezindawo zokukhiqiza ezinokwethenjelwa, izindawo zokuhlola kanye namalabhorethri angokwenyama namakhemikhali anazo zonke izinhlobo zemisebenzi. I-FR-4 esikhuluma ngayo lapha iwuhlobo lweshidi oluvame ukusetshenziswa kakhulu ekukhiqizeni amabhodi wesekethe we-pcb multilayer.
Okukha phezulu kakhulu, i-copper clad laminate esetshenziswa kakhulu kanye ne-prepreg emhlabeni wonke i-NEMA ebizwa nge-FR4
cishe 14% of the okukhipha isamba kuyinto single-emaceleni noma kabili emaceleni FR-4 ibhodi, futhi asele mayelana 40% of the multi-ungqimba ibhodi kuyinto mncane FR -4 laminates. Ukuphela komlando kokubusa kwe-FR-4's emakethe ngokuyinhloko kubangelwa ukuthi idlula kakhulu ama-laminates asekelwe ephepheni ezindaweni ezishisayo, umswakama othuthukisiwe nokumelana namakhemikhali, amandla aphezulu okuguquguquka namandla amahle we-peel. . I-FR4 i-laminate yokuqala engasetshenziselwa amaphaneli anezinhlangothi ezimbili entwasahlobo-ngembobo ngenxa yokumelana kwawo nomswakama kanye nokukhipha amakhemikhali. Futhi, inani lemali le-FR-4 alinakuhlulwa. Ngokuhamba kweminyaka, imboni icabange ukuthi i-FR-4 izovumela izinto ezisanda kuthuthukiswa ze-laminate ezifanele ukuminyana okuphezulu komhlangano. Kodwa-ke, ngenxa yezindleko zezindleko, abaklami bebhodi lesifunda basafuna izindlela zokusebenzisa i-FR-4 emihlanganweni ephakeme kakhulu.
Izinto eziqinisayo ezisetshenziselwa i-FR4 laminates i-electronic glass Wib (E-glass). Ngenxa yezakhiwo zayo ezinhle kakhulu zemishini, izakhiwo zokufaka ugesi ezanelisayo, ukumelana nokushisa, ukumelana nomswakama kanye nokumelana ne-asidi, indwangu ye-E-type fiber fiber isiyinto enhle kakhulu yokuqinisa ugesi. Zonke izindwangu ezisetshenziswa ku-FR4 zinesakhiwo esingaphezulu esibushelelezi ngokwendlela yokweluka ubhasikidi, futhi indawo engaphezulu imbozwe ungqimba lukapende ukuze kuqiniswe ukuhlangana phakathi kwemicu yengilazi nezinhlaka zemvelo. Ngesikhathi senqubo yokweluka, ubukhulu kanye nenani lemicu yengilazi kunqunywa. Isisindo esiyisisekelo nokuqina kwendwangu eqediwe kunqunywa, ubukhulu bendwangu yengilazi ye-fiber esetshenziselwa ibhodi eliphrintiwe iningi lisuka ku-6 kuya ku-172m, kanti i-prepreg eyakhiwe ngendwangu ye-glass fiber inquma ubukhulu be-laminate. Ngokuvamile, ukujiya kwe-FR4 laminate kungu-bam~1L57mm (kukhuphuka ngezikhathi ezithile ngo-25pm), futhi ukujiya okuthile kuncike ohlotsheni lwendwangu yengilazi yefibre kanye nokuqukethwe kwe-resin yemvelo yeshidi le-semi-chemical elisetshenzisiwe. Ukusebenza kwe-laminate ngokuyinhloko kunqunywa isakhiwo, njengoba umthengi kufanele enze izidingo ngokucophelela, futhi ngenxa yobukhulu obunikeziwe, kunezakhiwo eziningi ezingahlangabezana nokubekezelelana okunikeziwe. Ukuhlukahluka kokuqukethwe kwe-resin yemvelo (ngezinye izikhathi okubizwa ngokuthi isilinganiso sokhuni nendwangu ye-fiberglass) kuzothinta izakhiwo ze-laminate.
Isistimu yonke ye-epoxy yemvelo ye-resin yakhiwe izinhlanganisela ezihlukahlukene ze-epoxy ezisebenzayo, futhi inhlaka yemvelo ye-epoxy ejwayelekile (ingxenye ngayinye yayo) itholakala ngokuhlanganiswa kweqembu elilodwa le-epoxy kanye ne-tetrabromofluorescein A (TBPA). Kunezinhlanganisela ezimbili ze-epoxy oxygen ezisebenzayo kuketango le-polymer), njengoba kukhonjisiwe kuMfanekiso 4.6. Ubude beketanga phakathi kwamaqembu bunquma ukuqina kwe-laminate kanye nezakhiwo ezishisayo ze-laminate. Ngesikhathi senqubo yokwelapha, amaqembu oksijini we-epoxy asabela nge-ejenti elaphayo ukuze aqalise i-matrix ye-polymer enezinhlangothi ezintathu. Njengengxenye yeketango le-polymer, i-Wakamura bromine yengezwa ku-TBBPA, okwenza i-TBPA ibe nezindawo ezikhethekile ezibamba amalangabi. Ngokusho kwe-Underwriters Laboratories
(Underwriters Laboratory) Ukuhlolwa kwe-UL94, ukuze wenze i-laminate eqediwe enezinga le-V0 lokubuyiswa komlilo, kuyadingeka ukwengeza i-bromine phakathi kuka-16% no-21% ngesisindo.
Imikhiqizo yebhodi lesifunda se-pcb kubakhiqizi bebhodi lesifunda se-pcb multilayer ikhava amabhodi ungqimba we-2-28, amabhodi we-HDI, amabhodi ethusi aphezulu we-TG, amabhodi okubopha athambile futhi aqinile, amabhodi amafrikhwensi aphezulu, ama-laminates emidiya axubile, izimpumputhe ezingcwatshwe ngamabhodi, ama-substrates ensimbi futhi akukho Ipuleti le-halogen. Inzuzo yesifunda sebhasi ye-Shenzhen ilele ezinhlobonhlobo zama-wrenches aphakathi kuya phezulu, futhi intengo isathengeka kakhulu, futhi isivele isendaweni ehamba phambili embonini ye-pcb.
Isikhathi sokuthumela: Aug-08-2022