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

Claim 7:
8. An electronic device comprising a device housing to house different components of the electronic device, the device housing comprising:
a magnesium-alloy substrate;
a plurality of coating layers deposited over the magnesium-alloy substrate;
wherein the plurality of coating layers include at least a treatment layer, a metallic coating layer, a paint coating layer, and a top coating layer, wherein the treatment layer is applied over the magnesium-alloy substrate and is one of:
an oxide layer is 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;

wherein the metallic coating layer is applied over the treatment layer to provide a metallic luster;
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;

wherein the paint coating layer is disposed on a first portion of the metallic coating layer, and
the top coating layer is applied over the paint coating layer and a visible second portion of the metallic coating layer.