Abstract:
This document discusses, among other things, an apparatus including a silicon die including a vibratory diaphragm, the die having a silicon die top opposite a silicon die bottom, with a top silicon die port extending from the silicon die top through the silicon die to a top of the vibratory diaphragm, and with a bottom silicon die port extending from the silicon die bottom to a bottom of the vibratory diaphragm, wherein the bottom silicon die port has a cross sectional area that is larger than a cross-sectional area of the top silicon die port, a capacitor electrode disposed along a bottom of the silicon die, across the bottom silicon die port, the capacitor electrode including a first signal generation portion that is coextensive with the top silicon die port, and a second signal generation portion surrounding the first portion.
Abstract:
The invention relates to a method for producing a microelectromechanical device in a material substrate suitable for producing integrated electronic components, in particular a semiconductor substrate, wherein a material substrate (12, 14, 16) is provided on which at least one surface structure (26) is to be formed during production of the device. An electronic component (30) is formed in the material substrate (12, 14, 16) using process steps of a conventional method for producing integrated electronic components. A device component (44) defining the position of the electronic component (30) and/or required for the function of the electronic component (30) is selectively formed on the material substrate (12, 14, 16) from an etching stop material acting as an etching stop in case of etching of the material substrate (12, 14, 16) and/or in case of etching of a material layer (52) disposed on the material substrate (12, 14, 16). When the device component (44) of the electronic component (30) is implemented, a boundary region (48) is also formed on the material substrate (12, 14, 16) along at least a partial section of an edge of the surface structure (26), wherein said boundary region bounds said partial section. The material substrate (12, 14, 16) thus implemented is selectively etched for forming the surface structure (26), in that the edge of the bounding region (48) defines the position of the surface structure (26) to be implemented on the material substrate (12, 14, 16).
Abstract:
Disclosed is an integrated circuit (IC) comprising a body (10) including a plurality of circuit elements; and a metallization stack over said circuit elements for interconnecting said circuit elements, wherein the metallization stack comprises a conductive layer portion (22) opposite a flexible further conductive layer portion (24) and separated therefrom by a fluid medium (26), a surface of the said flexible further conductive layer portion being exposed to an external pressure; wherein at least some of the circuit elements are arranged to determining the external pressure by measuring a capacitance across the conductive layer portion and the flexible further conductive layer portion. A method of manufacturing such an IC is also disclosed.
Abstract:
A microelectromechanical systems (MEMS) pressure sensor device (20, 62) includes a substrate structure (22, 64) having a cavity (32, 68) formed therein and a substrate structure (24) having a reference element (36) formed therein. A sense element (44) is interposed between the substrate structures (22, 24) and is spaced apart from the reference element (36). The sense element (44) is exposed to an external environment (48) via one of the cavity (68) and a plurality of openings (38) formed in the reference element (36). The sense element (44) is movable relative to the reference element (36) in response to a pressure stimulus (54) from the environment (48). Fabrication methodology (76) entails forming (78) the substrate structure (22, 64) having the cavity (32, 68), fabricating (84) the substrate structure (24) including the sense element (44), coupling (92) the substrate structures, and subsequently forming (96) the reference element (36) in the substrate structure (24).
Abstract:
A technique (400) for manufacturing a micro-electro mechanical structure includes a number of steps. Initially, a cavity is formed into a first side of a handling wafer (404), with a sidewall of the cavity forming a first angle greater than about 54.7 degrees with respect to a first side of the handling wafer at an opening of the cavity. Then, a bulk etch is performed on the first side of the handling wafer to modify the sidewall of the cavity to a second angle greater than about 90 degrees (406), with respect to the first side of the handling wafer at the opening of the cavity. Next, a second side of a second wafer is bonded to the first side of the handling wafer (408).
Abstract:
The invention relates to a method and a device for measuring or detecting and/or generating of pressures or pressure changes, in particular acoustic vibration and a method for production of such a device. The invention particularly relates to a nano-microphone. The device comprises at least one nano-membrane with a support membrane and at least one counter-electrode, the support membrane having at least one monolayer.