公开(公告)号：US20190062939A1

公开(公告)日：2019-02-28

申请号：US15686026

申请日：2017-08-24

Applicant: Apple Inc.

Inventor： James A. CURRAN ,  Aaron D. PATERSON ,  William D. BURKE

IPC: C25D11/24 ,  H05K5/00 ,  H05K5/04

CPC classification number: C25D11/246 ,  B44C1/228 ,  C23C22/58 ,  C25D11/18 ,  C25D11/22 ,  C25D11/243 ,  G06F1/16 ,  H05K5/0086 ,  H05K5/04

Abstract: Treatments for anodic coatings that provide improved resistance to staining and cracking during various manufacturing processes are described. According to some embodiments, the methods include placing the anodic coatings in partially sealed states by sealing only the outermost portions of the anodic coatings, which protect the outer surfaces of the anodic coatings from contamination and staining. Inner portions of the anodic coatings are left unsealed, thereby making the anodic coatings more compliant and resistant to cracking when exposed to manufacturing processes, even those that involve exposure to high temperatures or high mechanical stress. Subsequent to the processing, another sealing process can be implemented to fully seal the anodic coatings so that they provide good corrosion and wear resistance.

公开(公告)号：US20170088967A1

公开(公告)日：2017-03-30

申请号：US15054004

申请日：2016-02-25

Applicant: Apple Inc.

Inventor： James A. CURRAN ,  William D. BURKE

IPC: C25D11/20 ,  C25D11/24 ,  C25F1/00 ,  C25D9/06

CPC classification number: C25D11/20 ,  C25D11/024 ,  C25D11/24 ,  C25D11/243 ,  C25D11/246 ,  C25F1/00 ,  H04M1/0202 ,  H04M1/0283

Abstract: Processes for cleaning anodic film pore structures are described. The processes employ methods for gas generation within the pores to flush out contamination within the anodic film. The pore cleaning processes can eliminate cosmetic defects related to anodic pore contamination during the manufacturing process. For example, an anodic film that is adjacent to a polymer piece can experience contamination originating from a gap between the anodic film and polymer piece, which can inhibit colorant uptake of the anodic film in areas proximate the polymer piece. In some cases, an alternating current anodizing process or a separate operation of cathodic polarization is implemented to generate hydrogen gas that bubbles out of the pores, forcing the contaminates out of the anodic film.