Kyoto Semiconductor Co., Ltd.

Yu Itazaki

Etsuji Omura

An edge incident type light receiving element unit capable of receiving optical signals in different wavelength ranges incident from the edge side comprises a first light receiving element for receiving optical signals in a first wavelength range and a second light receiving element for receiving optical signals in a second wavelength range, and configured so that optical signals transmitted through a first light receiving portion formed vertically on a wall portion of a first semiconductor substrate incident via a reflecting portion on a second light receiving portion formed on a second semiconductor substrate fitted on the first semiconductor substrate.

Light receiving element unit

The light receiving element unit includes a first light receiving element having a light receiving region on the main surface side of the first semiconductor substrate and a second light receiving element having a light receiving region on the main surface side of the second semiconductor substrate, and a support substrate having wiring for electrically connecting the first light receiving element and the second light receiving element to the outside, one of the first light receiving element and the second light receiving element has a recess formed in a concave shape from the back surface opposite to the light receiving region toward the light receiving region, and the other is accommodated in the recess.

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Kyoto, Japan

Yu Itazaki