Patent ID: 9065992
Filing Date: 2015-06-23
Classification: H01L,H04N

Abstract:
1. A solid-state image sensor including a plurality of pixels for detecting focus based on a phase-difference detection method, each of the plurality of pixels including: a semiconductor region including a plurality of photoelectric converters from which signals are allowed to be independently read out for detecting focus; a first microlens; a second microlens, made of a single material, which is arranged between the first microlens and the semiconductor region; and an insulating film arranged between the second microlens and the semiconductor region, the insulating film having a flat upper surface, wherein the second microlens includes a central portion and a peripheral portion that surrounds the central portion, the central portion having a flat upper surface, and a flat lower surface in contact with the flat upper surface of the insulating film, the peripheral portion having a upper surface, and a flat lower surface in contact with the flat upper surface of the insulating film, and wherein the upper surface of the peripheral portion is configured such that the peripheral portion has a positive power.