Patent ID: 7242133
Filing Date: 2007-07-10
Classification: G01C,Y10T

Abstract:
1. A method for producing a mechanical resonator with a planar monolithic vibrating structure machined in a crystalline material, comprising the steps of: when the crystalline material is chosen from crystalline materials of trigonal (1) or trigonal (2) structure, this material is cut in the [001] plane, and the 2nd-order vibration mode is then used, when the crystalline material is chosen from crystalline materials of tetragonal (1) or tetragonal (2) structure, this material is cut in the [001] plane, and the 3rd-order vibration mode is then used, when the crystalline material is chosen from crystalline materials of hexagonal structure, this material is cut in the [001] plane, and the 2nd-order or 3rd-order vibration mode is then used, when the crystalline material is chosen from crystalline materials of cubic structure other than silicon, it is either a) cut in the [111] plane, and the 2nd-order vibration mode is then used, or b) cut in the [100] plane, and the 3rd-order vibration mode is then used, and when the crystalline material is chosen from crystalline materials of cubic structure, it is cut in the [001] or [010] plane, and the 3rd-order vibration mode is then used, whereby the resonator exhibits natural material-based frequency isotropy Δf