Patent ID: 8866153

Claim:
A functional element formed by stacking semiconductor layers on a top face of a substrate having a hexagonal crystal structure, wherein the functional element has a boundary that forms at least two opposite sides of a top-face shape thereof, a first easy-to-split portion is formed at a position Y d μm away from the top face of the substrate (where Y d =X s ·tan (θ) and θ≠0) and displaced X s μm from the boundary, a second easy-to-split portion is formed at a different position from the first easy-to-split portion with respect to a direction perpendicular to the top face of the substrate, the functional element has a splitting face that includes the first and second easy-to-split portions and of which at least part is inclined, and element separation portions along the two opposite sides, respectively, of the top face of the functional element have approximately equal widths.