公开(公告)号：US20180237936A1

公开(公告)日：2018-08-23

申请号：US15881305

申请日：2018-01-26

Applicant: Apple Inc.

Inventor： James A. CURRAN ,  Aaron D. PATERSON ,  Brian M. GABLE

IPC: C25D21/00 ,  C25D11/30 ,  C25D11/34

CPC classification number: C25D21/00 ,  C25D11/04 ,  C25D11/08 ,  C25D11/12 ,  C25D11/16 ,  C25D11/243 ,  C25D11/246 ,  C25D11/30 ,  C25D11/34

Abstract: Anodic oxide coatings that provide corrosion resistance to parts having protruding features, such as edges, corners and convex-shaped features, are described. According to some embodiments, the anodic oxide coatings include an inner porous layer and an outer porous layer. The inner layer is adjacent to an underlying metal substrate and is formed under compressive stress anodizing conditions that allow the inner porous layer to be formed generally crack-free. In this way, the inner porous layer acts as a barrier that prevents water or other corrosion-inducing agents from reaching the underlying metal substrate. The outer porous layer can be thicker and harder than the inner porous layer, thereby increasing the overall hardness of the anodic oxide coating.

公开(公告)号：US20180073158A1

公开(公告)日：2018-03-15

申请号：US15379316

申请日：2016-12-14

Applicant: Apple Inc.

Inventor： Michael M. LI ,  Henry B. WETTERSTEN ,  Brian M. GABLE ,  Dakota A. BASS

IPC: C25D11/02 ,  C25D11/16 ,  B23K26/00 ,  B23K26/362 ,  B23K26/70 ,  H05K5/04 ,  H05K5/02

Abstract: Anodized substrates having laser markings and methods for forming the same are described. According to some embodiments, the methods involve forming a feature on a substrate using a laser prior to anodizing. The laser energy and pulse width can be chosen so as to provide a particular topology to a surface of the substrate that, after anodizing, absorbs incoming light and imparts a dark appearance to the feature. In some cases, the methods involve forming a coarse oxide layer, which is removed prior to anodizing. Since the laser marking is performed prior to anodizing, the anodized substrates are free from laser-induced cracks, thereby making the anodized substrates more corrosion resistant than conventional laser-marked anodized substrates. The techniques are well suited for forming features on consumer products that may be exposed to water or other corrosion-inducing agents.