Title:
ANODIC FILMS WITH ENHANCED FEATURES
Document Type and Number:
WIPO Patent Application WO/2017/074877
Kind Code:
A3
Abstract:
Anodizing techniques for providing enhanced anodic films are described. According to some embodiment, a barrier layer smoothing operation is used to flatten an interface between the anodic film and underlying metal substrate. According to some embodiments, the methods involve depositing a pigment having a particle diameter of about 20 nanometers or greater into an anodic film. According to some embodiments, the anodic films have multiple metal oxide layers. A first layer can provide scratch and chemical resistance and a second layer can provide a light diffusing pore structure that diffusely reflects incoming light and provides a white appearance to the anodic film. According to some embodiments, the anodic films have a dense porous layer and a thickened barrier layer. The porous layer can act as a cosmetic portion of the anodic film and have pores that have a colorant infused therein. The thickened barrier layer can distribute defects within the anodic film associated with alloying elements of the high performance aluminum alloy in a larger non-porous film compared to conventional anodic films, thereby lessening the chance of corrosion inducing agents of reaching the high performance aluminum alloy. The methods can be used form cosmetically appealing coatings for consumer products, such as housings for electronic products.
Inventors:
TATEBE MASASHIGE (US)
OSHIMA TAKAHIRO (US)
AKANA JODY R (US)
CURRAN JAMES A (US)
NAKAGISHI YUTAKA (US)
KATAYAMA JUNICHI (US)
HARA KENJI (US)
ITO YASUHIRO (US)
HONGOU AYUMI (US)
OSHIMA TAKAHIRO (US)
AKANA JODY R (US)
CURRAN JAMES A (US)
NAKAGISHI YUTAKA (US)
KATAYAMA JUNICHI (US)
HARA KENJI (US)
ITO YASUHIRO (US)
HONGOU AYUMI (US)
Application Number:
PCT/US2016/058529
Publication Date:
October 12, 2017
Filing Date:
October 24, 2016
Export Citation:
Assignee:
APPLE INC (US)
International Classes:
C25D11/14; C25D9/04; C25D11/08; C25D11/10; C25D11/12
Domestic Patent References:
| WO2015047635A1 | 2015-04-02 |
Foreign References:
| US5124172A | 1992-06-23 | |||
| US20150176146A1 | 2015-06-25 | |||
| US20130168253A1 | 2013-07-04 | |||
| US20120073973A1 | 2012-03-29 |
Attorney, Agent or Firm:
FERRAZANO, Michael J. et al. (US)
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