Invention Grant
- Patent Title: Colored multilayer oxide coatings
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Application No.: US15233728Application Date: 2016-08-10
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Publication No.: US11352708B2Publication Date: 2022-06-07
- Inventor: James A. Curran , Karin H. Rasmussen , Zechariah D. Feinberg
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Dorsey & Whitney LLP
- Main IPC: C23C14/10
- IPC: C23C14/10 ; C25D11/24 ; H05K5/04 ; C25D11/14 ; C25D11/26 ; C25D11/30 ; C25D11/22 ; B32B15/04 ; C25D11/08 ; C25D11/04

Abstract:
Colored oxide coatings having multiple oxide layers are described. Processes for forming the multilayer oxide coating can include converting a portion of a metal substrate to a primary oxide layer, coloring the primary oxide layer, and depositing a secondary oxide layer on the primary oxide layer. The primary oxide layer and the secondary oxide layer can be at least partially transparent such that a texture of an underlying metal substrate surface is visible through the multilayer oxide coating. A top surface of the secondary oxide layer can be polished to a high gloss to give the multilayer oxide coating an appearance of depth.
Public/Granted literature
- US20180049337A1 COLORED MULTILAYER OXIDE COATINGS Public/Granted day:2018-02-15
Information query
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