PCB hard kub thiab mos kub yog ob feem ntau siv hlau nto kev kho mob ntawm cov ntawv luam tawm Circuit Boards (PCBs). Lawv ua lub luag haujlwm tseem ceeb hauv kev lag luam hluav taws xob, tab sis muaj qhov sib txawv tseem ceeb ntawm ob.
PCB hard kub thiab mos kub yog ob feem ntau siv hlau nto kev kho mob ntawm cov ntawv luam tawm Circuit Boards (PCBs). Lawv ua lub luag haujlwm tseem ceeb hauv kev lag luam hluav taws xob, tab sis muaj qhov sib txawv tseem ceeb ntawm ob.
Ua ntej, cia peb kawm txog PCB nyuaj hlau. PCB nyuaj kub (tseem hu ua hard kub sockets) yog tsim los ntawm depositing ob hlau, npib tsib xee thiab kub, mus rau saum npoo ntawm PCB. Nws muaj qhov zoo conductivity thiab hnav tsis kam, uas tuaj yeem tiv thaiv oxidation teeb meem thaum lub sij hawm ntxig thiab tshem tawm. Vim lub thickness loj ntawm cov hlau nyuaj, feem ntau yog nruab nrab ntawm 1-3 microns, nws muaj corrosion kuj zoo thiab durability. Qhov no ua rau PCB nyuaj hlau yog qhov kev xaiv zoo tshaj plaws hauv cov ntawv thov uas yuav tsum tau siv sijhawm ntev, kev tso siab siab thiab lub sijhawm tshem tawm, lossis ib puag ncig hnyav.
Piv nrog rau kub kub, mos kub yog ib qho alloy ntawm palladium thiab npib tsib xee uas muaj kub lossis kub alloys. Piv nrog rau cov kub kub, nws cov hlau txheej yog nyias nyias, feem ntau ntawm {{0}}.05 thiab 0.1 micrometers. Cov txheej hlau nyias nyias tuaj yeem txo cov nqi thiab muab hluav taws xob zoo. Txawm li cas los xij, cov kub kub yog qhov cuam tshuam rau oxidation vim nws cov txheej nyias nyias, uas txo cov corrosion kuj thiab durability ntawm hard kub.
Yog li ntawd, cov kub muag feem ntau yog siv rau hauv cov ntawv thov uas cov kev xav tau vuam tsis nruj.
Txawm hais tias tawv kub muaj qhov zoo hauv kev tiv thaiv corrosion thiab kav ntev, thiab tsim nyog rau kev sib txuas zoo, nws lub peev xwm vuam yog qhov tsis zoo. Qhov tsis zoo welding muaj peev xwm ntawm cov tawv kub yog feem ntau yog vim lub thickness ntawm cov hlau txheej. Cov txheej hlau thicker ua rau melting thiab diffusion nyuaj dua, yog li txo qhov kev ntseeg ntawm vuam. Tsis tas li ntawd, qhov kub thiab txias tsim thaum lub sij hawm vuam kuj tseem tuaj yeem ua rau oxidation ntawm cov hlau tawv txheej, ntxiv txo qhov vuam zoo.