US 12,255,214 B2
Light detection device
Nao Inoue, Hamamatsu (JP); Ryosuke Koike, Hamamatsu (JP); and Haruyuki Nakayama, Hamamatsu (JP)
Assigned to HAMAMATSU PHOTONICS K.K., Hamamatsu (JP)
Filed by HAMAMATSU PHOTONICS K.K., Hamamatsu (JP)
Filed on Feb. 5, 2024, as Appl. No. 18/432,122.
Application 16/827,866 is a division of application No. 16/152,494, filed on Oct. 5, 2018, granted, now 10,672,814, issued on Jun. 2, 2020.
Application 18/432,122 is a continuation of application No. 18/120,594, filed on Mar. 13, 2023.
Application 18/120,594 is a continuation of application No. 17/375,176, filed on Jul. 14, 2021, granted, now 11,652,120, issued on May 16, 2023.
Application 17/375,176 is a continuation of application No. 16/827,866, filed on Mar. 24, 2020, granted, now 11,101,310, issued on Aug. 24, 2021.
Claims priority of application No. 2017-196297 (JP), filed on Oct. 6, 2017.
Prior Publication US 2024/0178249 A1, May 30, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H01L 27/146 (2006.01); H01L 23/00 (2006.01)
CPC H01L 27/14623 (2013.01) [H01L 27/14618 (2013.01); H01L 27/14634 (2013.01); H01L 27/14636 (2013.01); H01L 27/1464 (2013.01); H01L 27/14643 (2013.01); H01L 24/13 (2013.01); H01L 24/16 (2013.01); H01L 24/32 (2013.01); H01L 24/73 (2013.01); H01L 2224/13109 (2013.01); H01L 2224/16145 (2013.01); H01L 2224/2919 (2013.01); H01L 2224/32145 (2013.01); H01L 2224/73204 (2013.01)] 34 Claims
OG exemplary drawing
 
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 the opening is narrowed from the first opening edge toward a second opening edge opposite to the circuit element in the opening,
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.