Patent ID: 7736446

Claim:
A method for manufacturing a lanthanum aluminum oxide compound on a substrate, comprising: setting a number of H 2 O molecule, a number of CO molecule and a number of CO 2 molecule to one-half or less, one-fifth or less and one-tenth or less per one lanthanum atom, respectively, in an atmosphere; heating a lanthanum raw material in a first Knudsen cell at a first temperature of 900° C. or over to degas from the lanthanum raw material; heating an aluminum raw material in a second Knudsen cell at a second temperature from 800 to 1200° C. to degas from the aluminum raw material; and supplying the lanthanum raw material, the aluminum raw material, and an oxygen raw material gas simultaneously to the substrate under a condition that a number of O 2 molecule is set to 20 or more per one lanthanum atom to manufacture the lanthanum aluminum oxide compound on the substrate, wherein the lanthanum raw material is supplied by molecular beam epitaxy method by heating the lanthanum raw material in the first Knudsen cell at a temperature higher than the first temperature, and the aluminum raw material is supplied by molecular beam epitaxy method by heating the aluminum raw material in the second Knudsen cell at a temperature higher than the second temperature.