Patent ID: 9157144
Filing Date: 2015-10-13
Classification: C23C

Abstract:
1. A method of making thin film using a masking mechanism, the masking mechanism comprising: a mask; and a means for moving the mask in one direction on a straight line above or beneath a substrate; wherein the mask has a periphery making an angle of α (where 0°<α<90°) to the straight line, and a first and a second openings, the first opening has a first edge making an angle of 30°+α to the straight line, the second opening has a second edge making an angle of −30°+α to the straight line, the periphery, the first edge and the second edge are arranged along the one direction on the straight line, and further including the steps of: positioning the periphery of the mask immediately before a region of equilateral triangle where a thin film of ternary phase-diagrammatic system is to be formed in the substrate, moving the mask linearly in the same direction as the one direction, while a first material is evaporated so that the periphery forms a film-thickness gradient of the first material, moving the mask linearly and continuously in the same direction as the one direction, until the first edge of the mask is positioned immediately before the region of equilateral triangle where the thin film of ternary phase-diagrammatic system is to be formed in the substrate, moving the mask linearly in the same or opposite direction to the one direction, while a second material is evaporated so that the first edge of the mask forms a film-thickness gradient of the second material, moving the mask linearly and continuously in the same direction as the one direction, until the second edge of the mask is positioned immediately before the region of equilateral triangle where the thin film of ternary phase-diagrammatic system is to be formed in the substrate, and moving the mask linearly in the same or opposite direction to the one direction, while a third material is evaporated so that the second edge of the mask forms a film-thickness gradient of the third material.