Ukutshatyalaliswa kobushushu bebhodi yesekethe ye-PCB likhonkco elibaluleke kakhulu, ngoko yintoni ikhono lokutshatyalaliswa kobushushu bebhodi yesekethe ye-PCB, makhe siyixoxe kunye.
Ibhodi ye-PCB esetyenziswa kakhulu ekutshitshiseni ubushushu ngebhodi yePCB ngokwayo i-copper-covered/epoxy glasscloth substrate okanye i-phenolic resin yeglasi yelaphu substrate, kwaye kukho inani elincinci lephepha-eligqunywe ngobhedu elisetyenzisiweyo. Nangona ezi substrates zineempawu ezibalaseleyo zombane kunye neepropathi zokucubungula, zinokutshatyalaliswa kobushushu, kwaye njengendlela yokutshatyalaliswa kobushushu kumacandelo aphezulu okufudumeza, akunakulindeleka ukuba ziqhube ubushushu nge-PCB ngokwayo, kodwa ukutshabalalisa ubushushu ukusuka kumphezulu we-PCB. icandelo kumoya ojikelezileyo. Nangona kunjalo, njengoko iimveliso ze-elektroniki zingene kwixesha le-miniaturization yecandelo, ukufakwa koxinzelelo oluphezulu, kunye nendibano yobushushu obuphezulu, akwanelanga ukuthembela kuphela kumphezulu wendawo encinci kakhulu yokuchitha ubushushu. Kwangaxeshanye, ngenxa yokusetyenziswa okukhulu kwamacandelo axhonywe phezulu afana ne-QFP kunye ne-BGA, ubushushu obuveliswa ngamacandelo bugqithiselwa kwibhodi yePCB ngobuninzi, ngoko ke, eyona ndlela ilungileyo yokusombulula ubushushu kukuphucula ubushushu. amandla okuphelisa ubushushu ye-PCB ngokwayo ekudibaneni ngokuthe ngqo nento yokufudumeza, esasazwa okanye isasazwe ngebhodi ye-PCB.
Uyilo lwePCB
a, isixhobo esinobuntununtunu kubushushu sibekwe kwindawo yomoya obandayo.
b, isixhobo sokubona ubushushu sibekwe kweyona ndawo ishushu.
c, izixhobo ezikwibhodi enye eprintiweyo kufuneka zicwangciswe kangangoko kunokwenzeka ngokobungakanani bayo ubushushu kunye nesidanga ubushushu dissipation, ubushushu obuncinane okanye amahlwempu izixhobo ukumelana nobushushu (ezifana transistors umqondiso omncinci, iisekethe ezincinci ezidibeneyo, i-electrolytic capacitors. njl. ibekwe kumazantsi omlambo wokupholisa.
d, kwicala elithe tye, izixhobo eziphezulu zamandla zilungiselelwe ngokusondeleyo kumda webhodi eprintiweyo ukwenzela ukunciphisa indlela yokudlulisa ukushisa; Kwindlela ethe nkqo, izixhobo eziphezulu zamandla zilungiselelwe ngokusondeleyo kunokwenzeka kwibhodi eprintiweyo, ukwenzela ukunciphisa impembelelo yezi zixhobo kwiqondo lokushisa kwezinye izixhobo xa zisebenza.
e, ukutshatyalaliswa kobushushu bebhodi eprintiweyo kwisixhobo ikakhulu kuxhomekeke ekuhambeni komoya, ngoko ke indlela yokuhamba komoya kufuneka ifundwe kuyilo, kwaye isixhobo okanye ibhodi yesekethe eprintiweyo kufuneka iqwalaselwe ngokufanelekileyo. Xa umoya uhamba, uhlala udla ngokuhamba apho ukuchasana kuphantsi, ngoko ke xa ulungiselela isixhobo kwibhodi yesiphaluka eprintiweyo, kuyimfuneko ukuphepha ukushiya indawo enkulu yomoya kwindawo ethile. Ukucwangciswa kweebhodi zeesekethe ezininzi eziprintiweyo kuwo wonke umatshini kufuneka kwakhona ingqalelo ingxaki efanayo.
f, izixhobo ezingevayo kubushushu zibekwe ngcono kweyona ndawo isezantsi yobushushu (efana nomzantsi wesixhobo), ungawubeki ngentla kwesixhobo sokufudumeza, izixhobo ezininzi zezona zigqwesileyo zimile kwinqwelomoya ethe tye.
g, cwangcisa isixhobo ngesona sixhobo siphezulu sokusebenzisa amandla kunye neyona ndawo inkulu yokuchitha ubushushu kufutshane neyona ndawo ilungileyo yokuchitha ubushushu. Musa ukubeka izixhobo ezinobushushu obuphezulu kwiikona nasemacaleni ebhodi eprintiweyo, ngaphandle kokuba isixhobo sokupholisa silungiselelwe kufutshane nayo. Xa uyila ukuxhathisa amandla, khetha isixhobo esikhulu kangangoko kunokwenzeka, kwaye ulungelelanise uyilo lwebhodi eprintiweyo ukuze ibe nendawo eyaneleyo yokutshatyalaliswa kobushushu.
Ixesha lokuposa: Mar-22-2024
