Tooj liab yog ib qho ntawm feem ntau ntawm feem ntau ntawm cov hlau hauv ntiaj teb. Nws cov khoom tshwj xeeb ua nws haum rau ntau cov ntawv thov, suav nrog hluav taws xob kev coj ua. Tooj liab siv tau ntau yam hauv hluav taws xob thiab hluav taws xob cov khoom lag luam, thiab tooj liab foil yog cov khoom tseem ceeb rau kev tsim cov khoom lag luam hluav taws xob (PCBs). Ntawm cov sib txawv ntawm tooj liab cov ntawv ci siv hauv kev tsim cov PCBs, ed tooj liab ntawv yog qhov feem ntau siv.
Ed tooj liab ntawv ci yog tsim los ntawm Electro-Pradition (ED), uas yog cov txheej txheem ntawm cov xim hlau atom rau ntawm cov hlau me me los ntawm kev txhais tau tias muaj hluav taws xob hluav taws xob. Lub resulting tooj liab yog cov ntshiab heev, sib txig, thiab muaj cov khoom siv hluav taws xob zoo nkauj thiab hluav taws xob zoo.
Ib qho ntawm qhov tseem ceeb ntawm ed tooj liab ntawv muag yog nws cov kev coj ua. Cov txheej txheem hluav taws xob-dim kom ntseeg tau tias cov tuab tuab uas cov tuab tuab ntawm lub tooj liab ntawv ci yog ncaj thoob plaws hauv nws qhov chaw, uas yog qhov tseem ceeb hauv kev tsim PCB. Lub thickness ntawm tus tooj liab ntawv ci yog feem ntau teev nyob rau hauv microns, thiab nws tuaj yeem muaj los ntawm ob peb lub voos rau ob peb kaum ntawm daim ntawv thov. Lub thickness ntawm tus tooj liab ntawv txiav txim siab nws hluav taws xob conduction, thiab cov ntawv ci tuab ib txwm muaj kev ua haujlwm ntau dua.
Ntxiv rau nws cov kev sib xyaw ua ke, ed tooj liab ntawv muaj cov kws kho tshuab zoo dua. Nws yog qhov hloov tau yooj yim thiab tuaj yeem yooj yim khoov, puab, thiab tsim kom haum rau cov pcb. Qhov kev hloov pauv no ua rau nws cov khoom zoo tshaj plaws rau kev tsim cov PCBS nrog cov qauv kev tsim qauv thiab cov qauv tsim. Ntxiv mus, qhov kev sib luag ntawm tooj liab cov ntawv ci tso cai rau nws tiv thaiv dua khoov thiab yoog raws yam tsis tau tawg lossis tawg.
Lwm cov cuab yeej tseem ceeb ntawm ed tooj liab ntawv yog nws hluav taws xob conductivity. Tooj liab yog ib qho ntawm cov khoom siv hlau tshaj plaws, thiab ed tooj liab ntawv muaj kev tshaj tawm ntawm ntau tshaj 5 × 10 s / m. Qhov kev ua tau zoo ntawm kev coj ua yog qhov tseem ceeb hauv kev tsim cov pcbs, qhov twg nws ua rau cov khoom sib kis hluav taws xob ntawm cov khoom siv hluav taws xob. Ntxiv mus, qhov hluav taws xob qis tsis kam ntawm tooj liab cov khoom siv kom muaj lub teeb liab, uas yog qhov tseem ceeb hauv kev siv cov kev siv hluav taws xob siab thiab ntau zaus.
Ed tooj liab ntawv ci kuj tseem tiv taus oxidation thiab corrosion. Tooj liab reacts nrog oxygen nyob rau hauv cov huab cua los ua ib qho txheej loj ntawm tooj liab oxide ntawm nws cov npoo, uas tuaj yeem hloov kho nws cov hluav taws xob. Txawm li cas los xij, ed tooj liab ntawv ntim yog feem ntau coated nrog ib txheej ntawm cov khoom tiv thaiv, xws li tsis tiv thaiv oxidation thiab txhim kho nws lub solderability.
Hauv kev xaus, ed tooj liab ntawv ci yog ib qho ntau ntau thiab cov ntaub ntawv tseem ceeb hauv kev tsim cov PCBs. Nws cov kev sib luag, hloov pauv, muaj hluav taws xob siab, thiab corrosion ua nws cov khoom zoo rau kev tsim cov PCometries thiab kev xav tau siab. Nrog rau kev cog lus xav rau qhov nrawm nrawm thiab cov hluav taws xob hluav taws xob ntau zaus, qhov tseem ceeb ntawm ed tooj liab ntawv yog tsuas yog teeb tsa kom nce rau lub xyoo dhau los.
Lub Sijhawm Post: Feb-17-2023