Patent ID: 11920244
Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Field: Surface technology, coating (Chemistry)
Classification: CPC C  G  H | IPC C  G

Claim 0:
1. A device housing of an electronic device, comprising:
a magnesium-alloy substrate;
a treatment layer applied over the magnesium-alloy substrate, wherein the treatment layer is one of:
an oxide layer having a thickness in a range of from about 3 μm to about 15 μm; or
a passivation layer formed to obtain a non-metallic surface over the magnesium-alloy substrate, wherein the passivation layer has a thickness in a range of from about 1 μm to about 5 μm;

a metallic coating layer applied over the treatment layer to provide a metallic luster;
a paint coating layer disposed over a first portion of the metallic coating layer, wherein the paint coating layer comprises:
a clear coating layer applied over the metallic coating layer;
a primer coating layer applied over the clear coating layer; and
a base coating layer applied over the primer coating layer; and, a top coating layer applied over the paint coating layer and a visible second portion of the metallic coating layer.