# US 12,110,933 B2 · Wear resistant braking systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,110,933 B2 - Document ID: US12110933B2 - Status: Granted - Kind: B2 - Application number: 18/122,822 - Filed: 2023-03-17 - Published: 2023-07-13 - Granted: 2024-10-08 - Earliest claimed: 2013-03-15 - Assignees: Tech M3, Inc. - Applicants: Tech M3, Inc. - Inventors: Peter Filip; Nathan K. Meckel - Web page: https://patentgrep.com/patent/US12110933B2 ## CPC - F16D 65/127: {characterised by properties of the disc surface; Discs lined with friction material} - C23C 14/34: Sputtering - C23C 28/32: {including at least one pure metallic layer} - C23C 28/347: {with layers adapted for cutting tools or wear applications} - F16D 65/12: Discs; Drums for disc brakes - F16D 2065/132: {layered} - F16D 2069/004: {Profiled friction surfaces, e.g. grooves, dimples} - F16D 2200/0026: Non-ferro - F16D 2200/003: Light metals, e.g. aluminium - F16D 2250/00: Manufacturing; Assembly - F16D 2250/0046: Coating - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - 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) ## Abstract In some implementations of the current subject matter, a brake rotor can include a supporting layer applied to a friction surface of a brake rotor substrate, which can optionally include cast iron, and a coating applied over the supporting layer. The supporting layer can include a preparatory metal, and the coating can impart wear and corrosion resistant properties to the friction surface. Related systems, methods, articles of manufacture, and the like are disclosed. ## Claims ### Claim 1 A brake rotor, comprising a supporting layer applied to a friction surface of a brake rotor substrate, the supporting layer comprising a preparatory metal; and a coating applied over the supporting layer, the coating imparting wear and corrosion resistant properties to the friction surface wherein the friction surface of the brake rotor substrate comprises an activated layer, the activated layer resulting from back-sputtering of the friction surface prior to the supporting layer having been applied. ### Claim 2 (depends on 1) A brake rotor as in claim 1, wherein the brake rotor substrate comprises at least one of cast iron and an alloy of cast iron. ### Claim 3 (depends on 1) A brake rotor as in claim 1, wherein the back-sputtering of the friction surface comprises accelerating ions of the preparatory metal at the friction surface under a voltage in a range of approximately 400 V to 1200 V. ### Claim 4 (depends on 1) A brake rotor as in claim 1, wherein the preparatory metal comprises at least one of chrome and nickel. ### Claim 5 (depends on 1) A brake rotor as in claim 1, wherein the coating comprises graphene. ### Claim 6 (depends on 1) A brake rotor as in claim 1, wherein the coating comprises a first layer comprising a first material and a second layer comprising a second material. ### Claim 7 (depends on 6) A brake rotor as in claim 6, wherein the first material comprises a metal. ### Claim 8 (depends on 7) A brake rotor as in claim 7, wherein the metal comprises at least one of titanium, chromium, zirconium, aluminum, and hafnium. ### Claim 9 (depends on 6) A brake rotor as in claim 6, wherein the first layer comprises a plurality of layers of the first material merged to form a single layer. ### Claim 10 (depends on 6) A brake rotor as in claim 6, wherein the second material comprises at least one of a nitride, a boride, a carbide, or an oxide of the first material. ### Claim 11 (depends on 6) A brake rotor as in claim 6, wherein the coating comprises multiple iterations of the first layer and the second layer. ### Claim 12 (depends on 11) A brake rotor as in claim 11, wherein the multiple iterations of the first layer are deposited sequentially prior to deposition of the multiple iterations of the second layer. ### Claim 13 (depends on 11) A brake rotor as in claim 11, wherein the multiple iterations of the first layer are deposited alternatively with intervening deposition of one or more of the multiple iterations of the second layer. ### Claim 14 (depends on 11) The brake rotor as in claim 11, wherein each of the multiple iterations of the first layer and each of the multiple iterations of the second layer have a thickness in a range of one atom to three or four thousand Angstroms. ### Claim 15 (depends on 1) A brake rotor as in claim 1, wherein the friction surface comprises a first scale of surface topography, the first scale of surface topography comprising a plurality of island formations separated by channels. ### Claim 16 (depends on 15) A brake rotor as in claim 15, wherein some of a friction material of a brake pad is transferred to the friction surface of the brake rotor during braking such that a transfer film layer comprising the transferred friction material is created and mechanically held in place on the friction surface of the brake rotor by features of the first and/or second scale of surface topography. ### Claim 17 (depends on 16) A brake rotor as in claim 16, wherein the friction material of the brake pad and the friction material of the transfer film layer participate in an adherent friction interaction that enhances a braking power of a braking system comprising the brake rotor and the brake pad. ### Claim 18 (depends on 16) A brake rotor as in claim 16, wherein a friction material of the brake pad consists essentially of components other than copper. ### Claim 19 (depends on 1) A brake rotor as in claim 1, wherein the friction surface comprises a second scale of surface topography, the second scale of surface topography comprising a plurality of peaks and valleys of regular or irregular shape.