Patent ID: 9362368
Filing Date: 2016-06-07
CPC Classification: H01L

Claim Text:
1. A substrate with a silicon carbide film, comprising: a silicon substrate; and a cubic silicon carbide film and a mask stacked on the silicon substrate, wherein the cubic silicon carbide film has a first cubic silicon carbide film provided on the upper side of the silicon substrate and a second cubic silicon carbide film provided on the upper side of the first cubic silicon carbide film, the mask has a first mask provided between the silicon substrate and the first cubic silicon carbide film and a second mask provided between the first cubic silicon carbide film and the second cubic silicon carbide film, the first mask includes a first opening, and the silicon substrate is exposed from the first opening, the second mask includes a second opening, and the first cubic silicon carbide film is exposed from the second opening, and when the width of the first opening is represented by W