Indlela yokukhetha ngokufanelekileyo izixhobo zePCB kunye namacandelo e-elektroniki

Ukukhethwa kwezixhobo zePCB kunye namacandelo e-elektroniki afundiweyo, kuba abathengi kufuneka baqwalasele izinto ezininzi, ezifana nezalathisi zokusebenza zamacandelo, imisebenzi, kunye nomgangatho kunye nebakala lamacandelo.

Namhlanje, siya kwazisa ngocwangco indlela ukukhetha ngokuchanekileyo izixhobo PCB kunye namacandelo electronic.

Ukukhetha izinto zePCB

I-FR4 epoxy fiberglass wipes isetyenziselwa iimveliso ze-elektroniki, i-polyimide fiberglass wipes isetyenziselwa ubushushu obuphezulu be-ambient okanye iibhodi zesekethe eziguquguqukayo, kunye ne-polytetrafluoroethylene fiberglass wipes ziyafuneka kwi-high-frequency circuits. Kwiimveliso ze-elektroniki ezineemfuno eziphezulu zokutshatyalaliswa kobushushu, ii-substrates zetsimbi kufuneka zisetyenziswe.

Izinto ekufuneka ziqwalaselwe xa ukhetha izixhobo zePCB:

(1) I-substrate enobushushu obuphezulu beglasi (Tg) kufuneka ikhethwe ngokufanelekileyo, kwaye i-Tg kufuneka ibe phezulu kunobushushu bokusebenza besiphaluka.

(2) I-coefficient ephantsi yokwandiswa kwe-thermal (CTE) iyadingeka. Ngenxa ye-coefficient engahambelaniyo yokwandiswa kwe-thermal kwicala le-X, Y kunye nobukhulu, kulula ukubangela ukuguqulwa kwe-PCB, kwaye kuya kubangela ukuphuka komngxuma we-metallization kunye namalungu omonakalo kwiimeko ezinzima.

(3) Ukumelana nokushisa okuphezulu kuyadingeka. Ngokubanzi, iPCB iyafuneka ibe nokumelana nobushushu obungama-250℃/50S.

(4) Ukuthambeka okuhle kuyafuneka. Imfuno ye-PCB warpage ye-SMT yi <0.0075mm/mm.

(5) Ngokubhekiselele ekusebenzeni kombane, iisekethe eziphezulu ze-frequency zifuna ukukhethwa kwezixhobo ezine-dielectric rhoqo kunye nokulahleka kwe-dielectric ephantsi. Ukumelana ne-insulation, amandla ombane, ukuchasana kwe-arc ukuhlangabezana neemfuno zemveliso.

Ukukhethwa kwezixhobo ze-elektroniki

Ukongeza kokuhlangabezana neemfuno zokusebenza kombane, ukukhethwa kwamacandelo kufuneka kwakhona kuhlangabezane neemfuno zokuhlanganiswa komphezulu kumacandelo. Kodwa kwakhona ngokwemiqathango yezixhobo zomgca wemveliso kunye nenkqubo yemveliso yokukhetha ifom yokupakisha yecandelo, ubungakanani becandelo, ifom yokupakisha yecandelo.

Ngokomzekelo, xa indibano yoxinaniso oluphezulu lufuna ukukhethwa kwamacandelo amancinci amancinci amancinci: ukuba umatshini wokunyuka awunayo i-braid-braid feeder, ifowuni ye-SMD yokupakishwa kwe-braid ayikwazi ukukhethwa;