公开(公告)号：US20190098785A1

公开(公告)日：2019-03-28

申请号：US16125409

申请日：2018-09-07

Applicant: Apple Inc.

Inventor： Todd S. MINTZ ,  Shi Hua ZHANG ,  Abhijeet MISRA ,  Eric W. HAMANN

IPC: H05K5/06 ,  H05K5/00 ,  H05K5/04 ,  C23F1/02

Abstract: This application relates to a composite part that can include a non-metal layer having attachment features, and a metal part that is joined with the non-metal layer. The metal part can include a plurality of interlocking structures that are disposed at an external surface of the metal part, where each of the interlocking structures can include an opening characterized as having a first width, and an undercut region, where the opening leads into the undercut region, and the undercut region is characterized as having a second width that is greater than the first width such that the undercut region captures and retains one of the attachment features of the non-metal layer.