# US 12,224,291 B2 · Display device and manufacturing method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,224,291 B2 - Document ID: US12224291B2 - Status: Granted - Kind: B2 - Application number: 18/485,802 - Filed: 2023-10-12 - Published: 2024-02-01 - Granted: 2025-02-11 - Earliest claimed: 2020-05-14 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., LTD. - Inventors: Hyeon Bum Lee - Web page: https://patentgrep.com/patent/US12224291B2 ## CPC - H10D 86/60: wherein the TFTs are in active matrices - G06F 3/0412: {Digitisers structurally integrated in a display} - H10D 86/451: {characterised by the compositions or shapes of the interlayer dielectrics} - H10K 59/123: Connection of the pixel electrodes to the thin film transistors [TFT] - H10K 59/122: Pixel-defining structures or layers, e.g. banks - H10K 59/124: Insulating layers formed between TFT elements and OLED elements - H10K 59/38: comprising colour filters or colour changing media [CCM] - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract A display device may include a source electrode disposed on a substrate; a drain electrode disposed on the substrate; an insulating layer disposed on the source electrode and the drain electrode, the insulating layer including an opening overlapping the drain electrode; and a first electrode disposed on the insulating layer and electrically contacting the drain electrode in the opening of the insulating layer, wherein an angle between a side surface of the opening of the insulating layer and a plane parallel to the substrate is in a range of about 70 degrees to about 85 degrees. ## Claims ### Claim 1 A display device comprising: a substrate; a source electrode or a drain electrode disposed on the substrate, the source electrode or the drain electrode to provide current to a light emitting diode; a first insulating layer disposed on the source electrode or the drain electrode, the first insulating layer including a first opening overlapping the source electrode or the drain electrode; a second insulating layer overlapping an upper surface of the first insulating layer, the second insulating layer including a second opening overlapping the source electrode or the drain electrode; and a first electrode disposed on the second insulating layer and electrically contacting a source electrode or the drain electrode in the second opening of the second insulating layer, wherein an angle between a side surface of the second opening of the second insulating layer and a plane parallel to the substrate is in a range of about 70 degrees to about 85 degrees, and the display device does not include a polarizer. ### Claim 2 (depends on 1) The display device of claim 1, wherein an angle between a side surface of the first opening of the first insulating layer and the plane parallel to the substrate and the angle between the side surface of the second opening of the second insulating layer and the plane parallel to the substrate are equal to each other. ### Claim 3 (depends on 1) The display device of claim 1, wherein an angle between a side surface of the first opening of the first insulating layer and the plane parallel to the substrate and the angle between the side surface of the second opening of the second insulating layer and the plane parallel to the substrate are different from each other. ### Claim 4 (depends on 3) The display device of claim 3, wherein the angle between the side surface of the first opening of the first insulating layer and the plane parallel to the substrate is smaller than the angle between the side surface of the second opening of the second insulating layer and the plane parallel to the substrate. ### Claim 5 (depends on 1) The display device of claim 1, wherein an angle between a side surface of the first opening of the first insulating layer and the plane parallel to the substrate is equal to or less than about 45 degrees. ### Claim 6 (depends on 1) The display device of claim 1, wherein each of a thickness of the first insulating layer and a thickness of the second insulating layer are in a range of about 1.5 μm to about 3.0 μm. ### Claim 7 (depends on 1) The display device of claim 1, wherein the first insulating layer and the second insulating layer include different materials. ### Claim 8 (depends on 1) The display device of claim 1, wherein the first insulating layer includes a siloxane or a polyimide, and the second insulating layer includes a siloxane or a polyimide. ### Claim 9 (depends on 1) The display device of claim 1, wherein the source electrode includes a first source electrode and a second source electrode electrically connected to each other; or the drain electrode includes a first drain electrode and a second drain electrode electrically connected to each other, and the display device further comprises an intermediate layer disposed between the first source electrode and the second source electrode or the first drain electrode and the second drain electrode. ### Claim 10 (depends on 1) The display device of claim 1, further comprising: a partition wall disposed on the first electrode; and a spacer disposed on the partition wall, wherein at least one of the partition wall, the spacer, and the second insulating layer includes a black material. ### Claim 11 (depends on 1) The display device of claim 1, wherein a side surface of the first opening of the first insulating layer and the side surface of the second opening of the second insulating layer are disposed on a same surface. ### Claim 12 (depends on 10) The display device of claim 10, wherein an angle between a side surface of the first opening of the first insulating layer and the plane parallel to the substrate is in a range of about 70 degrees to about 85 degrees. ### Claim 13 (depends on 10) The display device of claim 10, wherein a side surface of the first insulating layer and a side surface of the first electrode directly contact each other. ### Claim 14 A display device comprising: a source electrode or a drain electrode disposed on a substrate; a first insulating layer disposed on the source electrode or the drain electrode, the first insulating layer including a first opening overlapping the source electrode or the drain electrode; a second insulating layer overlapping an upper surface of the first insulating layer, the second insulating layer including a second opening overlapping the source electrode or the drain electrode; and a first electrode disposed on the second insulating layer and electrically contacting a source electrode or the drain electrode in the second opening of the second insulating layer, wherein an angle between a side surface of the second opening of the second insulating layer and a plane parallel to the substrate is in a range of about 70 degrees to about 85 degrees, and the second insulating layer directly contacts a side surface of the first opening of the first insulating layer. ### Claim 15 (depends on 14) The display device of claim 14, wherein the display device does not include a polarizer. ### Claim 16 (depends on 1) The display device of claim 1, further comprising a light emitting diode, wherein the source electrode or the drain electrode is an electrode of the light emitting diode.