Tooj liab yog ib qho ntawm cov hlau uas siv tau ntau yam tshaj plaws hauv ntiaj teb. Nws cov yam ntxwv tshwj xeeb ua rau nws haum rau ntau yam kev siv, suav nrog kev ua hluav taws xob. Tooj liab siv dav hauv kev lag luam hluav taws xob thiab khoom siv hluav taws xob, thiab cov ntawv ci tooj liab yog cov khoom tseem ceeb rau kev tsim cov laug cam luam tawm (PCBs). Ntawm ntau hom ntawv ci tooj liab siv hauv kev tsim cov PCBs, ED ntawv ci tooj liab yog qhov siv dav tshaj plaws.
ED ntawv ci tooj liab yog tsim los ntawm electro-deposition (ED), uas yog ib qho txheej txheem uas cuam tshuam nrog kev tso cov atoms tooj liab rau ntawm qhov chaw hlau los ntawm kev siv hluav taws xob. Cov ntawv ci tooj liab uas tshwm sim yog qhov huv heev, sib xws, thiab muaj cov khoom siv kho tshuab thiab hluav taws xob zoo heev.
Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm ED tooj liab ntawv ci yog nws qhov sib xws. Cov txheej txheem electro-deposition ua kom ntseeg tau tias qhov tuab ntawm cov ntawv ci tooj liab yog sib xws thoob plaws nws qhov chaw, uas yog qhov tseem ceeb hauv kev tsim khoom PCB. Qhov tuab ntawm cov ntawv ci tooj liab feem ntau yog teev nyob rau hauv microns, thiab nws tuaj yeem ntau ntawm ob peb microns mus rau ntau kaum ntawm microns, nyob ntawm daim ntawv thov. Qhov tuab ntawm cov ntawv ci tooj liab txiav txim siab nws cov hluav taws xob conductivity, thiab cov ntawv ci tuab dua feem ntau muaj conductivity siab dua.
Ntxiv rau nws qhov sib xws, ED tooj liab ntawv ci muaj cov khoom siv kho tshuab zoo heev. Nws muaj kev ywj pheej heev thiab tuaj yeem yooj yim khoov, ua duab, thiab tsim kom haum rau cov duab ntawm PCB. Qhov kev ywj pheej no ua rau nws yog cov khoom siv zoo tshaj plaws rau kev tsim cov PCBs nrog cov qauv geometries thiab cov qauv tsim nyuaj. Ntxiv mus, qhov siab ductility ntawm tooj liab ntawv ci tso cai rau nws kom tiv taus rov ua dua thiab khoov yam tsis muaj kev tawg lossis tawg.
Lwm yam khoom tseem ceeb ntawm ED tooj liab ntawv ci yog nws cov hluav taws xob conductivity. Tooj liab yog ib qho ntawm cov hlau conductive tshaj plaws, thiab ED tooj liab ntawv ci muaj conductivity ntawm ntau dua 5 × 10 ^ 7 S / m. Qib siab ntawm conductivity no yog qhov tseem ceeb hauv kev tsim cov PCBs, qhov twg nws ua rau muaj kev xa cov teeb liab hluav taws xob ntawm cov khoom. Ntxiv mus, qhov tsis kam hluav taws xob qis ntawm tooj liab ntawv ci txo qhov poob ntawm lub zog teeb liab, uas yog qhov tseem ceeb hauv kev siv ceev thiab zaus siab.
ED tooj liab ntawv ci kuj tseem tiv taus oxidation thiab corrosion. Tooj liab reacts nrog oxygen hauv huab cua los tsim ib txheej nyias ntawm tooj liab oxide ntawm nws qhov chaw, uas tuaj yeem ua rau nws cov hluav taws xob conductivity. Txawm li cas los xij, ED tooj liab ntawv ci feem ntau yog coated nrog ib txheej ntawm cov khoom tiv thaiv, xws li tin lossis nickel, los tiv thaiv oxidation thiab txhim kho nws cov solderability.
Xaus lus, ED tooj liab ntawv ci yog ib yam khoom siv uas siv tau ntau yam thiab tseem ceeb hauv kev tsim cov PCBs. Nws qhov sib xws, kev ywj pheej, kev ua hluav taws xob siab, thiab kev tiv thaiv oxidation thiab corrosion ua rau nws yog ib yam khoom zoo tagnrho rau kev tsim cov PCBs nrog cov geometries nyuaj thiab cov kev xav tau kev ua tau zoo. Nrog rau qhov kev thov nce ntxiv rau cov khoom siv hluav taws xob ceev thiab zaus siab, qhov tseem ceeb ntawm ED tooj liab ntawv ci tsuas yog teeb tsa kom nce ntxiv hauv xyoo tom ntej.
Lub sijhawm tshaj tawm: Lub Ob Hlis-17-2023