Patent ID: 9620291
Date: 2017-04-11
CPC Classifications: H01G

Claim:
1. A thin film capacitor including a lower electrode layer, a dielectric layer provided on the lower electrode layer, and an upper electrode layer formed on the dielectric layer, wherein the dielectric layer includes a recessed portion in a portion on an upper face thereof, a cross-sectional structure perpendicular to the dielectric layer of the recessed portion has a cross-sectional taper angle of 1 to 25 degrees, the cross-sectional taper angle being formed by (1) a tangential line that is tangent to a position on an end portion of the recessed portion and at 50% of a maximum depth of the recessed portion, and (2) a line being an interface between a portion other than the recessed portion of the dielectric layer and the upper electrode layer, and a distance between a bottom portion center and an outermost portion of the recessed portion is 20 to 150 times a thickness of the dielectric layer.