US 12,295,178 B2
Image sensor
Yuan-Shuo Chang, Taichung (TW); and Ching-Chiang Wu, Zhubei (TW)
Assigned to VISERA TECHNOLOGIES COMPANY LIMITED, Hsin-Chu (TW)
Filed by VisEra Technologies Company Limited, Hsin-Chu (TW)
Filed on Jan. 19, 2021, as Appl. No. 17/152,288.
Prior Publication US 2022/0231074 A1, Jul. 21, 2022
Int. Cl. H01L 27/14 (2006.01); H10F 39/00 (2025.01); H10F 39/18 (2025.01)
CPC H10F 39/18 (2025.01) [H10F 39/8053 (2025.01); H10F 39/8063 (2025.01)] 19 Claims
OG exemplary drawing
 
1. An image sensor, comprising:
a substrate having a plurality of imaging sections;
first photodiodes and second photodiodes alternately disposed in the substrate, wherein one of the first photodiodes and one of the second photodiodes are provided in each of the plurality of imaging sections, wherein an area of each of the first photodiodes is less than an area of each of the second photodiodes from a top view;
an interlayer disposed on the substrate;
a light-guiding structure disposed in the interlayer and directly on at least one of the first photodiodes or the second photodiodes, wherein a refractive index of the light-guiding structure is greater than a refractive index of the interlayer;
a micro-lens layer disposed on the interlayer; and
a color filter array having a plurality of color filters disposed between the interlayer and the micro-lens layer, wherein each of the color filters overlaps only a first photodiode disposed in a first one of the plurality of imaging sections and a second photodiode disposed in a second one of the plurality of imaging sections that is adjacent to the first one of the plurality of imaging sections.