Invention Grant
- Patent Title: White anodic films with multiple layers
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Application No.: US15333070Application Date: 2016-10-24
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Publication No.: US10760175B2Publication Date: 2020-09-01
- Inventor: Masashige Tatebe , Takahiro Oshima , Jody R. Akana , Yutaka Nakagishi , Junichi Katayama , Kenji Hara , Yasuhiro Ito , Ayumi Hongou
- 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: C25D11/22
- IPC: C25D11/22 ; C25D11/16 ; C25D11/24 ; C25F3/20 ; H05K5/02 ; H05K5/04 ; C25D11/08 ; C25D11/10 ; C25D11/12 ; C25D11/06 ; G06F1/16

Abstract:
Anodic films that have a white color, and methods for forming the same, are described. According to some embodiments, the anodic films have multiple metal oxide layers. A first layer can provide scratch and chemical resistance and a second layer can provide a light diffusing pore structure that diffusely reflects incoming light and provides a white appearance to the anodic film. According to some embodiments, the anodic films also include a smoothed barrier layer that specularly reflects incoming light so as to brighten the appearance and enhance the white color of the anodic film. The resulting anodic films have an opaque white appearance not achievable using conventional techniques. The anodic films are well suited for providing cosmetically appealing coatings for consumer products, such as housings for electronic products.
Public/Granted literature
- US20170121836A1 WHITE ANODIC FILMS WITH MULTIPLE LAYERS Public/Granted day:2017-05-04
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