# US 10,501,842 B2 · Coated tool > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,501,842 B2 - Document ID: US10501842B2 - Status: Granted - Kind: B2 - Application number: 15/697,026 - Filed: 2017-09-06 - Published: 2018-01-11 - Granted: 2019-12-10 - Earliest claimed: 2012-08-10 - Assignees: Tungaloy Corporation - Applicants: Tungaloy Corporation - Inventors: Shota Asari; Masakazu Kikuchi - Web page: https://patentgrep.com/patent/US10501842B2 ## CPC - C23C 14/0641: {Nitrides (C23C14/0617 takes precedence)} - C23C 14/32: by explosion; by evaporation and subsequent ionisation of the vapours {, e.g. ion-plating}(C23C14/34 - C23C14/48 take precedence) - C23C 14/325: {Electric arc evaporation} - C23C 28/042: {including a refractory ceramic layer, e.g. refractory metal oxides, ZrO2, rare earth oxides} - C23C 28/044: {coatings specially adapted for cutting tools or wear applications} - C23C 28/42: {characterized by the composition of the alternating layers} - C23C 30/005: {on hard metal substrates} - Y10T 428/24975: No layer or component greater than 5 mils thick - C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A coated tool includes a substrate and a coating layer disposed on a surface of the substrate. The coating layer includes a first stack structure (3) and a second stack structure (4). The first stack structure has two or more kinds of layers with different compositions periodically stacked with an average layer thickness of 60-500 nm. The second stack structure has two or more kinds of layers with different compositions periodically stacked with an average layer thickness of 2 nm to less than 60 nm. The layers in each stack structure include at least one selected from the group consisting of metal elements Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Al, Si, Sr, Y, Sn and Bi; and compounds including at least one of these metal elements and at least one non-metal element selected from carbon, nitrogen, oxygen and boron. ## Claims ### Claim 1 A coated tool, comprising: a substrate and a coating layer disposed on a surface of the substrate, the coating layer including a first stack structure and a second stack structure, the first stack structure having a structure in which two or more kinds of layers with different compositions are periodically stacked, wherein the average layer thickness of each of the layers is 60 nm to 500 nm, the second stack structure having a structure in which two or more kinds of layers with different compositions are periodically stacked, wherein the average layer thickness of each of the layers is 2 nm to less than 60 nm, the layers constituting the first stack structure and the layers constituting the second stack structure including at least one selected from the compounds including at least one metal element selected from Ti, Nb, Ta, Cr, W, Al, Si, Sr and Y and at least one non-metal element selected from carbon and nitrogen, wherein the first stack structure is an alternate stack structure including two kinds of layers with different compositions stacked alternately each in two or more layers, and wherein the coating layer includes a structure including the first stack structures and the second stack structures stacked alternately and continuously each in two or more structures. ### Claim 2 (depends on 1) The coated tool according to claim 1, wherein the second stack structure is an alternate stack structure including two kinds of layers with different compositions stacked alternately each in two or more layers. ### Claim 3 (depends on 1) The coated tool according to claim 1, wherein (T1−T2) is 20 nm to 996 nm, wherein T1 is the average value of the stacking periods in the first stack structure and T2 is the average value of the stacking periods in the second stack structure. ### Claim 4 (depends on 1) The coated tool according to claim 1, wherein the metal elements present in the layers constituting the first stack structure are identical among the layers constituting the first stack structure and include one or more metal elements having a difference in absolute value of 5 at % or more between the ratio thereof relative to the total of the metal elements present in one layer constituting the first stack structure and the ratio of the identical metal element relative to the total of the metal elements present in a layer constituting the first stack structure which layer is adjacent to the one layer. ### Claim 5 (depends on 1) The coated tool according to claim 1, wherein the metal elements present in the layers constituting the second stack structure are identical among the layers constituting the second stack structure and include one or more metal elements having a difference in absolute value of 5 at % or more between the ratio thereof relative to the total of the metal elements present in one layer constituting the second stack structure and the ratio of the identical metal element relative to the total of the metal elements present in a layer constituting the second stack structure which layer is adjacent to the one layer. ### Claim 6 (depends on 1) The coated tool according to claim 1, wherein one layer constituting the first stack structure contains one or more metal elements different from the metal element or elements present in a layer constituting the first stack structure which layer is adjacent to the one layer. ### Claim 7 (depends on 1) The coated tool according to claim 1, wherein one layer constituting the second stack structure contains one or more metal elements different from the metal element or elements present in a layer constituting the second stack structure which layer is adjacent to the one layer. ### Claim 8 (depends on 1) The coated tool according to claim 1, wherein the average total layer thickness of the entirety of the coating layer is 0.22 to 12 μm. ### Claim 9 (depends on 1) The coated tool according to claim 1, wherein the average thickness of the first stack structure is 0.2 to 6 μm. ### Claim 10 (depends on 1) The coated tool according to claim 1, wherein the average thickness of the second stack structure is 0.02 to 6 μm.