Semiconductor light receiving element and optical pick-up device having the semiconductor light receiving element

摘要

A semiconductor light receiving element has: a semiconductor substrate; a plurality of photodiodes formed on the semiconductor substrate and configured to receive respective lights of different wavelengths; and an anti-reflection film provided on light receiving surfaces of the plurality of photodiodes. A structure of the anti-reflection film on at least one photodiode of the plurality of photodiodes is different from a structure of the anti-reflection film on another photodiode of the plurality of photodiodes.