公开(公告)号：US20250085463A1

公开(公告)日：2025-03-13

申请号：US18523605

申请日：2023-11-29

Applicant: Apple Inc.

Inventor： Brian S Tryon ,  Jozef M Matlak ,  Ziqing Duan ,  Yi Zhou ,  Di Fan ,  Donghai Yu

IPC: G02B5/28

Abstract: An electronic device may be provided with conductive structures such as conductive housing structures. A visible-light-reflecting coating may be formed on the conductive structures. The coating may have adhesion and transition layers, an opaque coloring layer on the adhesion and transition layers, and a two-layer thin-film interference filter on the opaque coloring layer. The two-layer thin-film interference filter may an uppermost diamond-like carbon (DLC) or CrSiCN layer and a lowermost SiCrCN layer. The coating may exhibit a dark blue or black color that has a relatively uniform visual response even when the underlying conductive structures have a three-dimensional shape.