Patent ID: 11929378
Assignee: HAMAMATSU PHOTONICS K.K.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A light detection device comprising:
a back-illuminated light receiving element including a plurality of light receiving portions;
a circuit element;
a connection member disposed between the light receiving element and the circuit element and configured to electrically and physically connect the light receiving element and the circuit element to each other;
an underfill disposed between the light receiving element and the circuit element; and
a frame-shaped light shielding mask disposed on the circuit element to surround the light receiving element when viewed from a light incident direction to the light receiving element,
wherein the light shielding mask includes a frame having an opening in which the light receiving element is located,
wherein a first opening edge on the side of the circuit element in the opening is located at the outside of an outer edge of the light receiving element when viewed from the light incident direction,
wherein a second opening edge opposite to the circuit element in the opening is located at the inside of the outer edge of the light receiving element when viewed from the light incident direction,
wherein the opening is narrowed from the first opening edge toward the second opening edge,
wherein a width of the frame increases from the first opening edge toward the second opening edge, and
wherein the underfill reaches a gap between the light receiving element and an inner surface of the opening of the light shielding mask.