Patent ID: 8956544
Filing Date: 2015-02-17
Classification: B81B,B81C,G01C,G01P

Abstract:
1. A method for manufacturing a micromechanical structure, comprising: forming a conduit in a first micromechanical functional layer made of a first material; closing off the conduit with a cover layer made of a second material to form a buried conduit having a first end and a second end; forming a second micromechanical functional layer, made of a third material, above the cover layer; patterning a micromechanical sensor structure and an edge region in the second micromechanical functional layer such that the edge region surrounds the sensor structure and defines an inner side containing the sensor structure and an outer side facing away from the sensor structure, and such that the first end is located on the outer side and the second end is located on the inner side; opening the buried conduit at the first and the second end in a first etching step such that a first etching medium is passed through the patterned second micromechanical functional layer to the first and the second end, and etches the cover layer selectively with respect to the first micromechanical functional layer and to the second micromechanical functional layer; and forming a cap on the edge region with a result that the opened buried conduit forms a fluid connection between the outer side and the inner side.