Ngenxa yezizathu ezininzi, kukho iintlobo ezininzi ezahlukeneyo zeeprojekthi zokwenziwa kwe-PCB ezifuna ubunzima obuthile bobhedu. Sifumana imibuzo evela kubathengi abangaqhelananga nombono wobunzima bobhedu ngezikhathi ezithile, ngoko eli nqaku lijolise ekusombululeni ezi ngxaki. Ukongeza, oku kulandelayo kubandakanya ulwazi malunga nefuthe lobunzima bobhedu obuhlukeneyo kwinkqubo yendibano yePCB, kwaye sinethemba lokuba olu lwazi luya kuba luncedo nakubathengi abasele beqhelene nale ngcamango. Ukuqonda okunzulu kwenkqubo yethu kunokukwenza ukuba ucwangcise ngcono ishedyuli yokuvelisa kunye neendleko zizonke.
Unokucinga ngobunzima bobhedu njengobunzima okanye ubude bomkhondo wobhedu, oluyinqanaba lesithathu ukuba idatha yobhedu yefayile yeGerber ayicingi. Iyunithi yomlinganiselo zii-ounces ngesikweri sonyawo (oz / ft2), apho i-1.0 oz yobhedu iguqulelwa kubunzima be-140 mils (35 μm).
IiPCB zobhedu olunzima zidla ngokusetyenziswa kwizixhobo zombane zombane okanye naziphi na izixhobo ezinokuthi zihlupheke ziimeko ezingqongileyo. Imikhondo etyebileyo inokubonelela ngokuqina okukhulu, kwaye inokwenza ukuba umkhondo uthwale ngoku ngakumbi ngaphandle kokunyusa ubude okanye ububanzi bomkhondo ukuya kwinqanaba elingenangqondo. Kwelinye icala leequation, iintsimbi zobhedu ezikhaphukhaphu ngamanye amaxesha zichazwa ukuphumeza umkhondo othile wokuthintela umkhondo ngaphandle kwesidingo sobude obuncinane kakhulu okanye ububanzi. Ngoko ke, xa ubala ububanzi bokulandelela, "ubunzima bobhedu" yintsimi efunekayo.
Ixabiso eliqhelekileyo lobunzima bobhedu yi-1.0 ounce. Gqibezela, ulungele iiprojekthi ezininzi. Kweli nqaku, libhekisa ekutyaleni ubunzima bobhedu lokuqala kwixabiso eliphezulu ngexesha lenkqubo yokwenziwa kwePCB. Xa ucacisa i-quotation yobunzima bobhedu obufunekayo kwiqela lethu lokuthengisa, nceda ubonise ixabiso lokugqibela (elicwecwe) lobunzima obufunekayo bobhedu.
IiPCB zobhedu ezishinyeneyo zithathwa ngokuba ziiPCB ezinobungqingqwa bangaphandle nangaphakathi bobhedu ukusuka kwi-3 oz/ft2 ukuya kwi-10 oz/ft2. Ubunzima bobhedu be-PCB yobhedu enzima eveliswayo ukusuka kwii-ounces ezi-4 kwisikwere ukuya kwii-ounces ezingama-20 ngeenyawo. Ubunzima bobhedu oluphuculweyo, oludityaniswe nongqimba olungqingqwa kunye ne-substrate efanelekileyo kumngxuma odlulayo, unokuguqula ibhodi yesekethe ebuthathaka ibe yiplatifomu yocingo ezinzileyo nethembekileyo. Iikondaktara zobhedu ezinzima ziya kwandisa kakhulu ubukhulu bePCB yonke. Ubunzima bobhedu kufuneka buhlale buqwalaselwa ngexesha lesigaba soyilo lwesiphaluka. Umthamo wangoku wokuthwala unqunywe ngububanzi kunye nobukhulu bobhedu obunzima.
Ixabiso eliphezulu lobunzima bobhedu aliyi kwandisa kuphela ubhedu ngokwalo, kodwa liphinde libangele ubunzima bokuthutha okongeziweyo kunye nexesha elifunekayo kumsebenzi, ubunjineli benkqubo, kunye nokuqinisekiswa komgangatho, okukhokelela ekunyuseni kweendleko kunye nokunyuka kwexesha lokuhambisa. Okokuqala, la manyathelo ongezelelweyo kufuneka athathwe, kuba i-copper eyongezelelweyo yokugubungela kwi-laminate idinga ixesha elingakumbi lokukhangela kwaye kufuneka ihambelane nezikhokelo ezithile ze-DFM. Ubunzima bobhedu bebhodi yesekethe nayo ichaphazela ukusebenza kwayo kwe-thermal, ibangela ukuba ibhodi yesekethe ifunxe ubushushu ngokukhawuleza ngexesha le-reflow soldering stage yendibano yePCB.
Nangona kungekho nkcazo esemgangathweni yobhedu obunzima, ngokuqhelekileyo kuyamkelwa ukuba i-3 ounces (oz) okanye ngaphezulu kobhedu isetyenziswe kwimigangatho yangaphakathi nangaphandle yebhodi yesiphaluka eprintiweyo, ibizwa ngokuba yi-PCB yobhedu enzima. Nayiphi na isekethe enobunzima bobhedu obudlula ii-ounces ezi-4 ngonyawo lwesikwere (ft2) ikwahlelwa njenge-PCB yobhedu enzima. Ubhedu olugqithisileyo luthetha i-ounces ezingama-20 ukuya kuma-200 kwisikwere sonyawo.
Inzuzo ephambili yeebhodi zeesekethe zobhedu obunzima kukukwazi ukumelana nokuvezwa rhoqo kwimisinga egqithisileyo, ukushisa okuphezulu kunye nokujikeleza okuphindaphindiweyo kwe-thermal, enokutshabalalisa iibhodi zeesekethe eziqhelekileyo ngaphakathi kwemizuzwana embalwa. Isitya sobhedu esinzima sinomthamo ophezulu wokuthwala, okwenza ukuba ihambelane nezicelo phantsi kweemeko ezinzima, ezifana nokukhusela kunye neemveliso zoshishino lwe-aerospace. Ezinye izibonelelo zeebhodi zesekethe zobhedu ezinzima ziquka:
Ngenxa yobunzima obuninzi bobhedu kwinqanaba lesiphaluka esifanayo, ubungakanani bemveliso bubumbene
Ubhedu olunzima olufakwe kwimingxunya lugqithise umsinga ophakamileyo ngePCB kwaye lunceda ukuhambisa ubushushu kwidinki yobushushu yangaphandle.
I-airborne high power density planar transformer
Iibhodi zesekethe eziprintiweyo ezinobhedu ezinzima zingasetyenziselwa iinjongo ezininzi, ezifana neziguquli zeplani, ukuchithwa kobushushu, ukuhanjiswa kwamandla aphezulu, abaguquli bamandla, njl. Iibhodi zeesekethe zobhedu ezinzima eziprintiweyo nazo zisetyenziselwa:
Ukunikezwa Amandla
Ukusasazwa kombane
Izixhobo zokuwelda
Ushishino lweemoto
Abavelisi beepaneli zelanga, njl.
Ngokweemfuno zoyilo, iindleko zemveliso yePCB yobhedu enzima iphezulu kunaleyo yePCB eqhelekileyo. Ke ngoko, okukhona intsonkothe ngakumbi uyilo, kokukhona ixabiso eliphezulu lokuvelisa iiPCB zobhedu ezinzima.