# US 10,872,916 B2 · Optical element, image sensor package, imaging device and electronic device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,872,916 B2 - Document ID: US10872916B2 - Status: Granted - Kind: B2 - Application number: 16/470,080 - Filed: 2017-11-15 - Published: 2019-10-17 - Granted: 2020-12-22 - Earliest claimed: 2016-12-16 - Assignees: Sony Corporation - Applicants: Sony Corporation - Inventors: Yusuke Suzuki - Web page: https://patentgrep.com/patent/US10872916B2 ## CPC - H10F 39/805: {Coatings} - G02B 1/118: having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures - G02B 3/0006: {Arrays (G02B3/02, G02B5/188 take precedence)} - G02B 5/208: {for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation} - H04N 25/70: SSIS architectures; Circuits associated therewith - H10F 39/804: {Containers or encapsulations} - H10F 39/806: {Optical elements or arrangements associated with the image sensors} - H10F 39/8063: {Microlenses} - H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract An optical element includes: a base; and an uneven structure layer that is disposed on at least one face of the base, and suppresses reflectance, the optical element having a reflectance of 1% or smaller, in a wavelength region of 400 nm or longer and 700 nm or shorter, a transmittance of 90% or larger, in a wavelength region of 470 nm or longer and 550 nm or shorter, and a variation of transmittance of 1% or smaller, between before and after a high-temperature environmental test conducted at 150° C. for 250 h. ## Claims ### Claim 1 An optical element comprising: a base; and an uneven structure layer that is disposed on one face of the base, and suppresses reflectance, the optical element having a reflectance of 1% or smaller, in a wavelength region of 400 nm or longer and 700 nm or shorter, a transmittance of 90% or larger, in a wavelength region of 470 nm or longer and 550 nm or shorter, and a variation of transmittance of 1% or smaller, between before and after a high-temperature environmental test conducted at 150° C. for 250 h. ### Claim 2 (depends on 1) The optical element according to claim 1, having a variation of transmittance of 1% or smaller, between before and after a high-temperature environmental test conducted at 150° C. for 1000 h. ### Claim 3 (depends on 1) The optical element according to claim 1, having a variation of transmittance of 1% or smaller, between before and after a heat resistance test conducted at 245° C. for 5 min. ### Claim 4 An optical element comprising: a base; and an uneven structure layer that is disposed on one face of the base, and suppresses reflectance, the optical element having a reflectance of 1% or smaller, in a wavelength region of 400 nm or longer and 700 nm or shorter, a transmittance of 90% or larger, in a wavelength region of 420 nm or longer and 600 nm or shorter, and a variation of transmittance of 1% or smaller, between before and after a high-temperature environmental test conducted at 150° C. for 250 h. ### Claim 5 (depends on 1) The optical element according to claim 1, wherein the uneven structure layer contains an organic resin, and the base contains at least one of glass, crystallized glass, or crystal. ### Claim 6 (depends on 5) The optical element according to claim 5, wherein the organic resin is a cured article of a UV curable resin composition. ### Claim 7 (depends on 6) The optical element according to claim 6, wherein the UV curable resin composition is at least one of a first composition that contains a first compound having vinyl group and a second compound having (meth)acryloyl group; or a second composition that contains a third compound having vinyl group and (meth)acryloyl group. ### Claim 8 (depends on 6) The optical element according to claim 6, wherein the UV curable resin composition is of solventless type. ### Claim 9 (depends on 1) The optical element according to claim 1, wherein the uneven structure layer contains a plurality of structures, and each structure has an aspect ratio of 1 or larger. ### Claim 10 (depends on 1) The optical element according to claim 1, further comprising a multilayered film that is disposed on the other face of the base, and suppresses reflectance. ### Claim 11 (depends on 1) The optical element according to claim 1, further comprising a multilayered film that is disposed on the other face of the base, and has a function for cutting light in a specified wavelength region. ### Claim 12 (depends on 1) The optical element according to claim 1, further comprising an uneven structure layer that is disposed on the other face of the base, and suppresses reflectance. ### Claim 13 (depends on 1) The optical element according to claim 1, wherein the uneven structure layer contains a light absorber. ### Claim 14 (depends on 13) The optical element according to claim 13, wherein the light absorber contains phthalocyanine-nickel complex. ### Claim 15 (depends on 1) The optical element according to claim 1, having a silane coupling agent applied between the base and the uneven structure layer. ### Claim 16 (depends on 1) The optical element according to claim 1, wherein adhesiveness between the base and the uneven structure layer is denoted by any one of classifications 0 to 2, in a cross-cut test in compliance with JIS K5600-5-6. ### Claim 17 (depends on 1) The optical element according to claim 1, being intended for an image sensor package. ### Claim 18 (depends on 1) An image sensor package comprising: a package including the optical element according to claim 1; and an image sensor housed in the package. ### Claim 19 (depends on 18) The image sensor package according to claim 18, wherein the uneven structure layer is opposed to the image sensor. ### Claim 20 (depends on 18) The image sensor package according to claim 18, further comprising a multilayered film that is disposed on the other face of the base, and has a function for cutting light in a specified wavelength region, wherein the uneven structure layer contains a light absorber. ### Claim 21 (depends on 20) The image sensor package according to claim 20, wherein the image sensor has, on a surface, a microlens. ### Claim 22 (depends on 18) An imaging device comprising the image sensor package according to claim 18. ### Claim 23 (depends on 18) An electronic device comprising the image sensor package according to claim 18. ### Claim 24 (depends on 4) An image sensor package comprising: a package including the optical element according to claim 4; and an image sensor housed in the package. ### Claim 25 (depends on 24) The image sensor package according to claim 24, wherein the uneven structure layer is opposed to the image sensor. ### Claim 26 (depends on 24) The image sensor package according to claim 24, further comprising a multilayered film that is disposed on the other face of the base, and has a function for cutting light in a specified wavelength region, wherein the uneven structure layer contains a light absorber. ### Claim 27 (depends on 26) The image sensor package according to claim 26, wherein the image sensor has, on a surface, a microlens. ### Claim 28 (depends on 24) An imaging device comprising the image sensor package according to claim 24. ### Claim 29 (depends on 24) An electronic device comprising the image sensor package according to claim 24.