Abstract:
The present invention relates to a method of manufacturing an MEMS device that comprises the steps of forming a first membrane layer over a sacrificial base layer, forming a second membrane layer over the first membrane layer, wherein the second membrane layer comprises lateral recesses exposing lateral portions of the first membrane layer and forming stoppers to restrict movement of the first membrane layer. Moreover, it is provided MEMS device comprising a movable membrane comprising a first membrane layer and a second membrane layer formed over the first membrane layer, wherein the second membrane layer comprises lateral recesses exposing lateral portions of the first membrane layer.
Abstract:
A Capacitive Micromachined Ultrasonic Transducer (CMUT) device includes at least one CMUT cell including a first substrate of a single crystal material having a top side including a patterned dielectric layer thereon including a thick and a thin dielectric region, and a through-substrate via (TSV) extending a full thickness of the first substrate. The TSV is formed of the single crystal material, is electrically isolated by isolation regions in the single crystal material, and is positioned under a top side contact area of the first substrate. A membrane layer is bonded to the thick dielectric region and over the thin dielectric region to provide a movable membrane over a micro-electro-mechanical system (MEMS) cavity. A metal layer is over the top side substrate contact area and over the movable membrane including coupling of the top side substrate contact area to the movable membrane.
Abstract:
The present invention relates to the field of sensor manufacturing technology, particularly disloses a method for manufacturing a micro-sensor body, compriseing the steps of S1: applying a wet colloidal material on a substrate to form a colloidal layer, and covering a layer of one-dimensional nanowire film on the surface of the colloidal layer to form a sensor embryo; S2: drying the colloidal layer of the sensor embryo to an extent that the colloidal layer cracks into a plurality of colloidal islands, a portion of the one-dimensional nanowire film contracting into a contraction diaphragm adhered to the surface of the colloidal islands while the other portion of the one-dimensional nanowire film being stretched into a connection structure connected between the adjacent contraction diaphragms. By the method for manufacturing a micro-sensor body of the present invention, the contraction diaphragms and connection structures formed by stretching the one-dimensional nanowire film are connected stably, which enhances the stability of the sensor devices; and the cracking manner renders it easy to obtain a large-scale of sensor bodies with connection structure arrays in stable suspension.
Abstract:
A MEMS device with electronics integration places integrated circuit components on a topping wafer (120A) of a sensing die to conserve space, minimize errors and reduce cost of the device as a whole. The topping wafer is bonded to a sensing wafer (118) and secured in a housing (138).
Abstract:
The present invention discloses a manufacturing method of an integrated structure of a MEMS microphone and a pressure sensor, which comprises the following steps: depositing an insulating layer, a first polycrystalline silicon layer, a sacrificial layer and a second polycrystalline silicon layer in sequence on a shared substrate; etching the second polycrystalline silicon layer to form a vibrating diaphragm and an upper electrode; eroding the sacrificial layer to form a containing cavity of a microphone and a pressure sensor, and etching the sacrificial layer between the microphone and the pressure sensor; etching the first polycrystalline silicon layer to form a back electrode of the microphone and a lower electrode of the pressure sensor; etching a position of the shared substrate below a back electrode of the microphone to form a back cavity; and etching away the region of the insulating layer below the back electrode. A capacitance structure of a MEMS microphone and that of a pressure sensor are integrated on a shared substrate, improving integration of a MEMS microphone and a pressure sensor, and greatly reducing a size of a whole packaging structure; in addition, a microphone and a pressure sensor can be simultaneously manufactured on a shared substrate to improve the efficiency of production.
Abstract:
A pressure sensor die assembly comprises a base substrate having a first surface, a stop structure on the first surface, and a diaphragm structure coupled to the first surface. The diaphragm structure comprises a first side with a cavity section including a first cavity and a second cavity surrounding the first cavity; a pressure sensing diaphragm portion having a first thickness and defined by the first cavity; and an over pressure diaphragm portion having a second thickness and defined by the second cavity, the second thickness greater than the first thickness. When an over pressure is applied, at least some area of the pressure sensing diaphragm portion is deflected and supported by the stop structure. As over pressure is increased, the over pressure diaphragm portion deflects and engages with the first surface such that additional area of the pressure sensing diaphragm portion is deflected and supported by the stop structure.
Abstract:
A wavelength tunable gain medium with the use of micro-electromechanical system (MEMS) based Fabry-Perot (FP) filter cavity tuning is provided as a tunable laser. The system comprises a laser cavity and a filter cavity for wavelength selection. The laser cavity consists of a gain medium such as a Semiconductor Optical Amplifier (SOA), two collimating lenses and an end reflector. The MEMS-FP filter cavity comprises a fixed reflector and a moveable reflector, controllable by electrostatic force. By moving the MEMS reflector, the wavelength can be tuned by changing the FP filter cavity length. The MEMS FP filter cavity displacement can be tuned discretely with a step voltage, or continuously by using a continuous driving voltage. The driving frequency for continuous tuning can be a resonance frequency or any other frequency of the MEMS structure, and the tuning range can cover different tuning ranges such as 30 nm, 40 nm, and more than 100 nm.
Abstract:
Systems, devices, and methods for micro-electro-mechanical system (MEMS) tunable capacitors can include a fixed actuation electrode attached to a substrate, a fixed capacitive electrode attached to the substrate, and a movable component positioned above the substrate and movable with respect to the fixed actuation electrode and the fixed capacitive electrode. The movable component can include a movable actuation electrode positioned above the fixed actuation electrode and a movable capacitive electrode positioned above the fixed capacitive electrode. At least a portion of the movable capacitive electrode can be spaced apart from the fixed capacitive electrode by a first gap, and the movable actuation electrode can be spaced apart from the fixed actuation electrode by a second gap that is larger than the first gap.
Abstract:
A method of manufacturing a base body having a microscopic hole, includes: forming at least one of a first modified region and a second modified region by scanning inside of a base body with a focal point of a first laser light having a pulse duration on order of picoseconds or less; forming a periodic modified group formed of a plurality of third modified regions and fourth modified regions by scanning an inside of the base body with a focal point of a second laser light having a pulse duration on order of picoseconds or less; obtaining the base body which is formed so that the first modified region and the second modified region overlap or come into contact with the modified group; and forming a microscopic hole by removing the first modified region and the third modified regions by etching.