公开(公告)号：US20180080138A1

公开(公告)日：2018-03-22

申请号：US15410564

申请日：2017-01-19

Applicant: Apple Inc.

Inventor： James A. CURRAN ,  Kevin B. MICKLEWRIGHT ,  Karin H. RASMUSSEN

IPC: C25D11/24 ,  H05K5/04 ,  H05K5/02

CPC classification number: C25D11/243 ,  C25D11/246

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.