Abstract:
본 발명은 기판(1)과, 박막 영역(10a)을 포함하고 기판(1) 상부에 제공되는 단결정층(10)과, 박막 영역(10a)의 하부에 제공된 중공실(50)과, 둘러싸인 층(10)에 비해 상승된 도핑(n + , p + )을 포함하는 단결정층(10) 내에 제공된 하나 이상의 다공 영역(150, 150')을 포함하는 마이크로 기계식 구성 요소를 제공한다.
Abstract:
PURPOSE: A method for insulating a fine structure of a single crystalline silicon using a triple layer is provided to insulate a fine structure of a single crystalline silicon without an additional photo/etch process. CONSTITUTION: A thermal oxide layer is formed on a fine structure of single crystalline silicon by performing a thermal oxidation process. A conductive layer is insulated electrically with a single crystalline silicon substrate by the thermal oxide layer. A doped polysilicon layer is deposited on a surface of the thermal oxide layer by using an LPCVD(Low Pressure Chemical Vapor Deposition) method. An aluminium layer is deposited on an upper portion of a trench and a part of a sidewall of the trench by using a sputtering method or a deposition method. Each electrode is insulated by etching the deposited polysilicon layer and removing a part of the deposited polysilicon.
Abstract:
A membrane structure element which can be easily manufactured, has excellent insulating characteristics and a high quality is provided. A method for manufacturing such membrane structure element is also provided. The membrane structure element is provided with a membrane formed of a silicon oxide film, and a substrate for supporting the membrane in a hollow status by supporting a part of the periphery of the membrane. The method for manufacturing such membrane is provided with a film forming step of forming a heat-shrinkable silicon oxide film (13) on the surface side of a silicon substrate (2) by plasma CVD method; a heat treatment step of performing heat treatment for making the silicon oxide film (13) formed on the substrate (1) shrink with heat; and a removing step of removing a part of the substrate (2) so that a corresponding part of the silicon oxide film (13) to the membrane is supported as a membrane to the substrate (2) in the hollow status, and forming a recessed section (4).
Abstract:
PURPOSE: To provide a method of manufacturing a structure having, on a silicon substrate, columnar structures which are uniform in shape and have an enough heat resistance and mechanical strength, and also to provide a DNA segregating device manufactured by the method. CONSTITUTION: The structure has, on the silicon substrate, columns whose principal planes are coated with a thermal oxide film. The columns are formed of only a thermal oxide film or of a thermal oxide film and silicon. The thermal oxide film formed on the principal planes of the columns is connected to a thermal oxide film formed on the surface of the substrate or inside the substrate.
Abstract:
Aspects of this disclosure relate to driving a capacitive micromachined ultrasonic transducer (CMUT) with a pulse train of unipolar pulses. The CMUT may be electrically excited with a pulse train of unipolar pulses such that the CMUT operates in a continuous wave mode. In some embodiments, the CMUT may have a contoured electrode.
Abstract:
A piezoelectric microelectromechanical systems microphone is provided comprising a sensor, an anchor region at which the sensor is supported by a substrate, a first region of the sensor adjacent to the anchor region, the first region having at least one piezoelectric layer and at least one electrode, and a second region of the sensor, the second region being adjacent to the first region, having at least one piezoelectric layer and at least one electrode, and having a thickness less than the thickness of the first region. A method for manufacturing a piezoelectric microelectromechanical systems microphone is also provided.
Abstract:
The invention is a process for producing an electromechanical device including a movable portion that is able to deform with respect to a fixed portion. The process implements steps based on fabrication microtechnologies, applied to a substrate including an upper layer, an intermediate layer and a lower layer. These steps are: a) forming first apertures in the upper layer; b) forming an empty cavity in the intermediate layer, which step is referred to as a pre-release step because a central portion of the upper layer lying between the first apertures is pre-released; c) applying what is called a blocking layer to the upper layer, this layer covering the first apertures, the blocking layer and the central portion together forming a suspended microstructure above the empty cavity; d) producing a boundary trench in the suspended microstructure, so as to form, in this microstructure, a movable portion and a fixed portion, the movable portion forming a movable member of the electromechanical device.
Abstract:
A method of fabricating a reinforced silicon micromechanical part includes: micro-machining the part, or a batch of parts in a silicon wafer; forming a silicon dioxide layer over the entire surface of the part, in one or plural operations, so as to obtain a thickness of silicon dioxide that is at least five times greater than the thickness of native silicon dioxide; and removing the silicon dioxide layer by etching.
Abstract:
An HF vapor etch etches high aspect ratio openings to form MEMS devices and other tightly-packed semiconductor devices with 0.2 um air gaps between structures. The HF vapor etch etches oxide plugs and gaps with void portions and oxide liner portions and further etches oxide layers that are buried beneath silicon and other structures and is ideally suited to release cantilevers and other MEMS devices. The HF vapor etches at room temperature and atmospheric pressure in one embodiment. A process sequence is provided that forms MEMS devices including cantilevers and lateral, in-plane electrodes that are stationary and vibration resistant.