公开(公告)号：US20250052936A1

公开(公告)日：2025-02-13

申请号：US18505906

申请日：2023-11-09

Applicant: Apple Inc.

Inventor： Shuang Li ,  Brian S. Tryon ,  Jacob L. Smith ,  Naoto Matsuyuki

IPC: G02B5/28 ,  G04G9/00

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 and a thin-film interference filter on the adhesion and transition layers. The thin-film interference filter may be a four-layer interference filter stacked directly onto the adhesion and transition layers and having an uppermost SiCrN layer, a lowermost SiN layer, and interleaved SiH and SiN layers. If desired, an opaque coloring layer such as a Cr layer may be disposed between the interference filter and the adhesion and transition layers. The coating may exhibit a deep red or orange color that has a relatively uniform visual response even when the underlying conductive structures have a three-dimensional shape.