Invention Application
- Patent Title: PROCESSES FOR REDUCING SURFACE CONCENTRATION OF DYES IN ANODIC OXIDES
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Application No.: US15410564Application Date: 2017-01-19
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Publication No.: US20180080138A1Publication Date: 2018-03-22
- Inventor: James A. CURRAN , Kevin B. MICKLEWRIGHT , Karin H. RASMUSSEN
- Applicant: Apple Inc.
- Main IPC: C25D11/24
- IPC: C25D11/24 ; H05K5/04 ; H05K5/02

Abstract:
Dyed anodic oxides having modified dye concentration profiles, and processes for forming the same, are described. The modified dye concentration profiles can be characterized as having a peak of dye concentration beyond at least a specified distance from an outer surface of an anodic oxide. The modified dyed anodic oxides less prone to discoloration, color fading and other cosmetic defects compared to conventionally dyed anodic oxides. The dyed anodic oxides are well suited for implementation on metal surfaces of consumer products, such as consumer electronic products.
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