# US 2017/0257554 A1 · Integrated circuit device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0257554 A1 - Document ID: US20170257554A1 - Status: Published application - Kind: A1 - Application number: 15/060,604 - Filed: 2016-03-04 - Published: 2017-09-07 - Earliest claimed: 2016-03-04 - Assignees: Taiwan Semiconductor Manufacturing Company, Ltd. - Applicants: Taiwan Semiconductor Manufacturing Co., Ltd. - Inventors: Zen-Fong Huang; Volume Chien - Web page: https://patentgrep.com/patent/US20170257554A1 ## CPC - H04N 23/672: {based on the phase difference signals} - H04N 23/55: Optical parts specially adapted for electronic image sensors; Mounting thereof - H10F 39/182: {Colour image sensors} - H10F 39/8053: {Colour filters} - H10F 39/8063: {Microlenses} - H10F 39/807: {Pixel isolation structures} - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION ## Abstract Integrated circuit devices are disclosed. The integrated circuit device includes a focus detection pixel and a lens. The focus detection pixel includes a photosensitive unit and a photo-insensitive unit in a substrate. The lens is disposed over the focus detection pixel, wherein the photosensitive unit and the photo-insensitive unit are disposed opposite to each other with respect to an optical axis of the lens, and a light beam passing through the lens is simultaneously incident into the photosensitive unit and the photo-insensitive unit. ## Claims ### Claim 1 An integrated circuit device, comprising: a focus detection pixel, comprising a photosensitive unit and a photo-insensitive unit in a substrate; and a lens, disposed over the focus detection pixel, wherein the photosensitive unit and the photo-insensitive unit are disposed opposite to each other with respect to an optical axis of the lens, and a light beam passing through the lens is simultaneously incident into the photosensitive unit and the photo-insensitive unit. ### Claim 2 (depends on 1) The integrated circuit device according to claim 1, wherein a size of the photosensitive unit is about equal to a size of the photo-insensitive unit. ### Claim 3 (depends on 1) The integrated circuit device according to claim 1, further comprising a plurality of isolation structures in the substrate, wherein the photosensitive unit and the photo-insensitive unit are respectively disposed between the isolation structures. ### Claim 4 (depends on 1) The integrated circuit device according to claim 1, wherein the photo-insensitive unit is an insulating feature. ### Claim 5 (depends on 1) The integrated circuit device according to claim 1, wherein the photo-insensitive unit is a doped region having the same conductivity type as the substrate. ### Claim 6 (depends on 1) The integrated circuit device according to claim 1, wherein the photo-insensitive unit is a portion of the substrate without additional doping. ### Claim 7 (depends on 1) The integrated circuit device according to claim 1, further includes a color filter disposed between the focus detection pixel and the lens. ### Claim 8 An integrated circuit device, comprising: a plurality of image sensing pixels; a focus detection pixel pair, disposed among the image sensing pixels and comprising a first focus detection pixel and a second focus detection pixel, wherein the first focus detection pixel comprises a first photosensitive unit at a first side and a first photo-insensitive unit at a second side, and the second focus detection pixel comprises a second photosensitive unit at the second side and a second photo-insensitive unit at the first side; and lenses, respectively disposed over the image sensing pixels, the first focus detection pixel and the second focus detection pixel, wherein the first side and the second side are opposite to each other with respect to an optical axis of the lens, a light beam passing through the lens over the first focus detection pixel is simultaneously incident into the first photosensitive and photo-insensitive units, and a light beam passing through the lens over the second focus detection pixel is simultaneously incident into the second photosensitive and photo-insensitive units. ### Claim 9 (depends on 8) The integrated circuit device according to claim 8, wherein at least one of a size of the first photosensitive unit, the first photo-insensitive unit, the second photosensitive unit, and the second photo-insensitive unit is about equal to a size of the image sensing pixel. ### Claim 10 (depends on 8) The integrated circuit device according to claim 8, wherein a size of the lens over at least one of the first focus detection pixel and the second focus detection pixel is about equal to a size of the lens over the image sensing pixel. ### Claim 11 (depends on 8) The integrated circuit device according to claim 8, wherein a size of the lens over at least one of the first focus detection pixel and the second focus detection pixel is larger than a size of the lens over the image sensing pixel. ### Claim 12 (depends on 8) The integrated circuit device according to claim 8, wherein a size of the first photosensitive unit is about equal to a size of the first photo-insensitive unit. ### Claim 13 (depends on 8) The integrated circuit device according to claim 8, wherein a size of the second photosensitive unit is about equal to a size of the second photo-insensitive unit. ### Claim 14 (depends on 8) The integrated circuit device according to claim 8, wherein one of the first side and the second side is a right side, and the other of the first side and the second side is a left side. ### Claim 15 (depends on 8) The integrated circuit device according to claim 8, further includes color filters disposed between the image sensing pixels and the lens, the first focus detection pixel and the lens, and the second focus detection pixel and the lens. ### Claim 16 (depends on 8) The integrated circuit device according to claim 8, wherein the first focus detection pixel and the second focus detection pixel are disposed adjacent to each other. ### Claim 17 An integrated circuit device, comprising: a plurality of image sensing pixels; a focus detection pixel pair, comprising a first focus detection pixel and a second focus detection pixel, wherein the first focus detection pixel comprises a first photosensitive unit and a first photo-insensitive unit, and the second focus detection pixel comprises a second photosensitive unit and a second photo-insensitive unit; and lenses, respectively disposed over the image sensing pixels, the first focus detection pixel and the second focus detection pixel, wherein a size of the lens over the first focus detection pixel and a size of the lens over the second focus detection pixel are respectively larger than a size of the lens over the image sensing pixel. ### Claim 18 (depends on 17) The integrated circuit device according to claim 17, wherein a size of the lens over the first focus detection pixel and a size of the lens over the second focus detection pixel are respectively about two times a size of the lens over the image sensing pixel. ### Claim 19 (depends on 17) The integrated circuit device according to claim 17, wherein a size of each of the first photosensitive unit, the first photo-insensitive unit, the second photosensitive unit, and the second photo-insensitive unit is about equal to a size of the image sensing pixel. ### Claim 20 (depends on 17) The integrated circuit device according to claim 17, wherein a light beam passing through the lens over the first focus detection pixel is simultaneously incident into the first photosensitive and photo-insensitive units, and a light beam passing through the lens over the second focus detection pixel is simultaneously incident into the second photosensitive and photo-insensitive units.