Patent ID: 11966074
Assignee: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  G  B  H | IPC B  C  F

Claim 4:
5. A process for manufacturing the metal back plate according to claim 1, comprising:
obtaining a metal substrate comprising a first section and a second section;
placing the second section in annealing equipment to perform a first annealing treatment, while the first section remains outside the annealing equipment; and
performing a cutting and punching treatment on the metal substrate after the first annealing treatment, such that at least part of the second section forms the second area of the metal back plate, at least part of the first section is used as the first area of the metal back plate, and a first opening is formed in the first area to obtain the metal back plate.