Molecular beam epitaxy, lossis MBE, yog ib txoj kev tshiab rau kev loj hlob cov zaj duab xis nyias zoo ntawm cov siv lead ua rau ntawm cov khoom siv lead ua. Hauv cov xwm txheej nqus tsev siab heev, los ntawm lub qhov cub cua sov muaj txhua yam khoom xav tau thiab tsim cov pa dej, los ntawm cov qhov tsim tom qab sib txuas cov beam atomic lossis molecular beam, txhaj tshuaj ncaj qha mus rau qhov kub thiab txias ntawm cov khoom siv lead ua ib leeg, tswj cov beam molecular rau cov khoom siv lead ua tib lub sijhawm, nws tuaj yeem ua rau cov molecules lossis atoms hauv cov txheej sib dhos siv lead ua los ua cov zaj duab xis nyias rau ntawm cov khoom siv lead ua "kev loj hlob".

Rau kev ua haujlwm ib txwm ntawm MBE cov khoom siv, cov kua nitrogen uas muaj kev ntshiab siab, siab qis thiab huv si heev yuav tsum tau thauj mus rau chav txias ntawm cov khoom siv tas mus li thiab ruaj khov. Feem ntau, lub tank uas muab cov kua nitrogen muaj qhov tso zis siab ntawm 0.3MPa thiab 0.8MPa. Cov kua nitrogen ntawm -196 ℃ yooj yim vaporized rau hauv nitrogen thaum lub sijhawm thauj mus los ntawm cov kav dej. Thaum cov kua nitrogen nrog cov roj-kua piv ntawm kwv yees li 1: 700 tau gasified hauv cov kav dej, nws yuav siv ntau qhov chaw ntws kua nitrogen thiab txo qhov ntws ib txwm ntawm qhov kawg ntawm cov kav dej kua nitrogen. Tsis tas li ntawd, hauv lub tank cia kua nitrogen, yuav muaj cov khib nyiab uas tsis tau ntxuav. Hauv cov kav dej kua nitrogen, qhov muaj huab cua ntub kuj tseem yuav ua rau muaj cov dej khov slag. Yog tias cov khoom tsis huv no raug tso tawm rau hauv cov khoom siv, nws yuav ua rau muaj kev puas tsuaj rau cov khoom siv.

Yog li ntawd, cov kua nitrogen hauv lub tank cia sab nraum zoov raug thauj mus rau MBE cov khoom siv hauv lub chaw ua haujlwm tsis muaj plua plav nrog kev ua haujlwm siab, ruaj khov thiab huv si, thiab qhov siab qis, tsis muaj nitrogen, tsis muaj impurities, 24 teev tsis muaj kev cuam tshuam, xws li kev tswj kev thauj mus los yog cov khoom tsim nyog.