Patent ID: 11970387
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Measurement (Instruments)
Classification: CPC B  G | IPC B

Claim 10:
11. A micro-electro mechanical system (MEMS) device, comprising:
a MEMS substrate;
at least one movable element laterally confined within a matrix layer that overlies the MEMS substrate; and
a cap substrate bonded to the matrix layer, wherein:
a first movable element selected from the at least one movable element is located inside a first chamber that is laterally bounded by the matrix layer and vertically bounded by a first capping surface that overlies the first movable element;
the first capping surface comprises an array of downward-protruding bumps including respective portions of a bump-containing material layer; and
the cap substrate comprises a vertically raised horizontal surface that overlies the first chamber,
wherein inverted trenches vertically extend upward from a vertically raised horizontal surface of the cap substrate into the cap substrate.