# US 12,604,592 B2 · Display device and method of fabricating the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,604,592 B2 - Document ID: US12604592B2 - Status: Granted - Kind: B2 - Application number: 18/076,241 - Filed: 2022-12-06 - Published: 2023-06-15 - Granted: 2026-04-14 - Earliest claimed: 2021-12-10 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., LTD. - Inventors: Jae Hee Kim; Ki Nyeng Kang; In Pyo Kim; Jeong Kook Wang; Hyo Jeong Lee; Jong Hwan Cha - Web page: https://patentgrep.com/patent/US12604592B2 ## CPC - H10H 29/142: {Two-dimensional arrangements, e.g. asymmetric LED layout} - H10W 90/00: Package configurations - H10H 20/821: of the light-emitting regions, e.g. non-planar junctions - H10H 20/831: characterised by their shape - H10H 20/84: Coatings, e.g. passivation layers or antireflective coatings - H10H 20/851: Wavelength conversion means - H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls - H10H 20/032: {of electrodes} - H10H 20/034: {of coatings} - H10H 20/0364: {of interconnections} - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract A display device may include a first electrode and a second electrode spaced from each other on a substrate. A light emitting element may be on the first electrode and the second electrode. A first insulating pattern may be on the light emitting element. A first contact electrode may be on a first side of the first insulating pattern and contacting a first end of the light emitting element. A second insulating pattern may be on the first insulating pattern and partially covering the first contact electrode. A third insulating layer may be on the second insulating pattern. A second contact electrode may be on a second side of the first insulating pattern, and contact a second end of the light emitting element that is exposed from the first insulating pattern, the second insulating pattern, and the third insulating layer. ## Claims ### Claim 1 A display device comprising: a first electrode and a second electrode spaced from each other on a substrate; a light emitting element on the first electrode and the second electrode; a first insulating pattern on the light emitting element; a first contact electrode adjacent to a first side of the first insulating pattern and contacting a first end of the light emitting element; a second insulating pattern on the first insulating pattern and partially covering the first contact electrode; a third insulating layer on the second insulating pattern; and a second contact electrode adjacent to a second side of the first insulating pattern, and contacting a second end of the light emitting element that is exposed from the first insulating pattern, the second insulating pattern, and the third insulating layer. ### Claim 2 (depends on 1) The display device according to claim 1, wherein a stepped portion is formed in a portion of the first contact electrode that is covered with the second insulating pattern. ### Claim 3 (depends on 2) The display device according to claim 2, wherein a thickness of the portion of the first contact electrode is less than an average thickness of the first contact electrode. ### Claim 4 (depends on 3) The display device according to claim 3, wherein the average thickness of the first contact electrode is greater than an average thickness of the second contact electrode. ### Claim 5 (depends on 1) The display device according to claim 1, wherein the first insulating pattern and the second insulating pattern comprise an identical material or similar materials. ### Claim 6 (depends on 1) The display device according to claim 1, wherein the second insulating pattern is on the light emitting element at a position closer to the first electrode than to the second electrode. ### Claim 7 (depends on 1) The display device according to claim 1, wherein the first electrode and the second electrode are spaced from each other in a first direction, and wherein a distance between the first contact electrode and the second contact electrode in the first direction is equal to or less than one third of a distance between the first electrode and the second electrode in the first direction. ### Claim 8 (depends on 7) The display device according to claim 7, wherein the distance between the first contact electrode and the second contact electrode is approximately 1 μm. ### Claim 9 (depends on 8) The display device according to claim 8, wherein a width of the second insulating pattern with respect to the first direction is approximately 2 μm. ### Claim 10 (depends on 1) The display device according to claim 1, wherein the second contact electrode partially covers the third insulating layer. ### Claim 11 (depends on 10) The display device according to claim 10, wherein the first contact electrode partially covers the first insulating pattern. ### Claim 12 (depends on 11) The display device according to claim 11, wherein the first contact electrode comprises: a first part located between the first insulating pattern and the second insulating pattern; and a second part located between the second insulating pattern and the third insulating layer. ### Claim 13 (depends on 1) The display device according to claim 1, wherein an average thickness of the first contact electrode is substantially identical with an average thickness of the second contact electrode. ### Claim 14 (depends on 1) The display device according to claim 1, further comprising color conversion particles on the light emitting element, and configured to convert light having a first color emitted from the light emitting element to light having a second color. ### Claim 15 A display device comprising: a first electrode and a second electrode spaced from each other on a substrate; a light emitting element on the first electrode and the second electrode; an insulating pattern on the light emitting element; a first contact electrode adjacent to a first side of the insulating pattern and contacting a first end of the light emitting element; and a second contact electrode adjacent to a second side of the insulating pattern and contacting a second end of the light emitting element, wherein a stepped portion is formed in a portion of the first contact electrode that overlaps the insulating pattern in a thickness direction of the substrate, and wherein a thickness of the portion of the first contact electrode is less than an average thickness of the first contact electrode. ### Claim 16 (depends on 15) The display device according to claim 15, wherein the portion of the first contact electrode is located between the insulating pattern and the light emitting element. ### Claim 17 (depends on 15) The display device according to claim 15, wherein the insulating pattern is on the light emitting element at a position closer to the first electrode than to the second electrode. ### Claim 18 (depends on 15) The display device according to claim 15, wherein the first electrode and the second electrode touch the light emitting element. ### Claim 19 A method of fabricating a display device, comprising: preparing a panel comprising a first electrode and a second electrode spaced from each other on a substrate, and a light emitting element on the first electrode and the second electrode; forming a first insulating pattern on the light emitting element, the first insulating pattern exposing a first end of the light emitting element, and covering a second end of the light emitting element; forming a first contact electrode on the first end of the light emitting element and the first electrode; forming a second insulating pattern on the first insulating pattern and a portion of the first contact electrode; exposing the second end of the light emitting element by forming a third insulating layer that covers the second insulating pattern and the first contact electrode and by partially etching the first insulating pattern, the second insulating pattern, and the third insulating layer; and forming a second contact electrode on the second end of the light emitting element and the second electrode. ### Claim 20 (depends on 19) The method according to claim 19, further comprising forming the first contact electrode on the first end of the light emitting element and the first electrode after forming the second insulating pattern, wherein a stepped portion is formed in a portion of the first contact electrode that is covered with the second insulating pattern.