Patent ID: 11868184
Assignee: DARWIN PRECISION CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A metal backplate comprising two plain parts along its longitudinal direction and a flexible part lying between two plain parts, the flexible part having a first surface and a second surface underneath the first surface, the first surface being etched or etched partially a plurality of curved first openings forming a first array in staggered arrangement, and the total area of the first openings amount to 45%˜86% of that of the first surface;
wherein the second surface has etched a plurality of the first openings forming a second array in staggered arrangement, and the first openings on the first array and on the second array are in staggered arrangement;
wherein each etching depth of the first openings of the first array and each etching depth of the first openings of the second array is 20 μm;
wherein a width direction is rectangular to the longitudinal direction, the first openings having a width parallel to the width direction, a first span lying between the adjacent first openings along the width direction and the width being in triple of the first span;
wherein each of the first openings not extending completely through the flexible part of the metal backplate.