Si Windows-low Density (Nws qhov ntom yog ib nrab ntawm cov khoom siv Germanium)

Lub teeb yog yooj yim dispersed ntawm grain ciam teb nyob rau hauv cov ntaub ntawv polycrystalline, yog li cov ntaub ntawv kho qhov muag yuav tsum tau high-purity ib leeg-crystal silicon substrates. Kev hloov pauv ntawm raw silicon rau hauv high-purity ib leeg-crystal substrates pib nrog mining thiab txo silica nyob rau hauv high-temperature furnaces. Cov neeg tsim khoom txuas ntxiv ua kom zoo dua thiab sib txuas 97% ntshiab polysilicon kom tshem tawm lwm yam impurities, thiab purity tuaj yeem ncav cuag 99.999% lossis zoo dua.
Khoom Paub meej:
Silicon (Si) ib leeg siv lead ua yog cov khoom siv tsis muaj tshuaj lom neeg uas muaj siab hardness thiab insoluble hauv dej. Nws muaj lub teeb kis tau zoo hauv 1-7μm band, thiab nws kuj muaj lub teeb kis tau zoo nyob rau hauv qhov deb infrared band 300-300μm Kev ua tau zoo, uas yog qhov tshwj xeeb uas lwm cov khoom siv kho qhov muag tsis muaj. Silicon (Si) ib leeg siv lead ua feem ntau yog siv los ua lub substrate ntawm 3-5μm mid-wave infrared optical qhov rais thiab kho qhov muag lim. Vim muaj cov thermal conductivity zoo thiab qhov ntom ntom ntawm cov khoom siv no, nws kuj yog qhov kev xaiv zoo tshaj plaws rau kev ua cov tsom iav laser lossis infrared ntsuas kub thiab infrared optical lo ntsiab muag. Feem ntau siv cov ntaub ntawv, cov khoom yuav coated los yog uncoated.