Invention Grant
- Patent Title: Preparation of metal substrate surfaces for electroplating in ionic liquids
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Application No.: US14271371Application Date: 2014-05-06
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Publication No.: US09758888B2Publication Date: 2017-09-12
- Inventor: Evgeniya Freydina , Shiyun Ruan , Christopher A. Schuh , Alan C. Lund
- Applicant: XTALIC CORPORATION
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Downey Brand LLP
- Main IPC: C25D5/44
- IPC: C25D5/44 ; C25D3/66 ; C25D5/18 ; C25D5/48 ; C25D11/04 ; C25F1/04 ; C25F1/12

Abstract:
Metal surface pretreatments using ionic liquids prior to electroplating are disclosed. The surface treatments include forming an activated metal substrate surface by removing any naturally formed metal oxide layers formed on the surfaces of the metal substrates. According to some embodiments, the surface treatments include exposing the metal substrate to a non-aqueous ionic liquid. In some embodiments, an electrical current is applied to the metal substrate to assist removal of the metal oxide layer. The electrical current can be a pulsed anodic current. After activating the surface, a metal layer can be deposited on the activated surface. In some embodiments, the metal layer is electrodeposited in the same ionic liquid used to form the activated surface. The resultant metal coating is resistant to scratching and peeling.
Public/Granted literature
- US20150322582A1 PREPARATION OF METAL SUBSTRATE SURFACES FOR ELECTROPLATING IN IONIC LIQUIDS Public/Granted day:2015-11-12
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