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US 10,244,647 B2Granted
Substrate with insulating layer
AssigneeHewlett-Packard Development Company, L.P.
InventorsKuan-Ting Wu, Yu-Chuan Kang, Chung-Hung Huang
Life of this patent
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Abstract
A substrate with a Micro-Arc Oxidation (MAO) layer or an electrophoretic deposition (ED) layer on a first side of the substrate and an electrically insulating layer on a second side of the substrate.
Claims14
A method of treating a substrate comprising a first surface and a second surface, the first surface and the second surface being electrically conductive surfaces on opposite sides of the substrate, the method comprising:
- applying an electrically insulating coating to the first surface of the substrate before performing a Micro-Arc Oxidation (MAO) or an electrophoretic deposition (ED);
- immersing the substrate with the electrically insulating coating on the first surface into a bath of an electrolyte solution;
- and
- performing the MAO or the ED on the second surface of the substrate, wherein the electrically insulating coating covers at least 80% of the first surface of the substrate, wherein the first surface is an inside surface of a casing for an electronic device and the second surface is an outside surface of the casing.
1 more element
A casing for an electronic device comprising:
- a substrate, a Micro-Arc Oxidation (MAO) layer or an electrophoretic deposition (ED) layer on an exterior surface of the substrate;
- and
- an electrically insulating layer on an inner surface of the substrate to prevent the MAO layer or the ED layer from forming on portions of the substrate with the electrically insulating layer when the substrate is immersed in a bath of an electrolyte solution, wherein the exterior surface of the substrate faces an exterior of the casing and the inner surface of the substrate faces an interior of the casing.
A casing for an electronic device comprising:
- a substrate having a surface area;
- a first portion of the surface area of the substrate being covered with an electrically insulating layer;
- and
- a second portion of the surface area of the electrically conductive substrate being covered with a Micro-Arc Oxidation (MAO) layer or an electrophoretic deposition (ED) layer, wherein the electrically insulating layer is to prevent the MAO layer or the ED layer from forming on the first portion of the surface area of the substrate that is covered with the electrically insulating layer when the substrate is immersed in a bath of an electrolyte solution, wherein the first portion comprises at least 45% of the surface area of the substrate, wherein the first portion of the surface area includes an inside surface of the casing and the second portion of the surface area includes an outside surface of the casing.
1 more element
Dependencies are inferred from the claim text.