公开(公告)号：US20190382911A1

公开(公告)日：2019-12-19

申请号：US16360851

申请日：2019-03-21

Applicant: Apple Inc.

Inventor： James A. CURRAN ,  Rohit G. PURANIK ,  Shi Hua ZHANG ,  James A. DEAN ,  Karin H. RASMUSSEN

IPC: C25D11/24 ,  C25D11/14 ,  C25D11/34

Abstract: This application relates to an enclosure for a portable electronic device. The enclosure includes an aluminum alloy substrate and an anodized layer overlaying and formed from the aluminum alloy substrate, wherein the anodized layer has an external surface that has a concentration of zinc that is between about 3 wt % to about 7 wt %.