Abstract:
A two-step method of releasing microelectromechanical devices from a substrate is disclosed. The first step comprises isotropically etching a silicon oxide layer sandwiched between two silicon-containing layers with a gaseous hydrogen fluoride-water mixture, the overlying silicon layer to be separated from the underlying silicon layer or substrate for a time sufficient to form an opening but not to release the overlying layer, and the second step comprises adding a drying agent to substitute for moisture remaining in the opening and to dissolve away any residues in the opening that can cause stiction.
Abstract:
An etching method, such as for forming a micromechanical device, is disclosed. One embodiment of the method is for releasing a micromechanical structure, comprising, providing a substrate; providing a sacrificial layer directly or indirectly on the substrate; providing one or more micromechanical structural layers on the sacrificial layer; performing a first etch to remove a portion of the sacrificial layer, the first etch comprising providing an etchant gas and energizing the etchant gas so as to allow the etchant gas to physically, or chemically and physically, remove the portion of the sacrificial layer; performing a second etch to remove additional sacrificial material in the sacrificial layer, the second etch comprising providing a gas that chemically but not physically etches the additional sacrificial material. Another embodiment of the method is for etching a silicon material on or within a substrate, comprising: performing a first etch to remove a portion of the silicon, the first etch comprising providing an etchant gas and energizing the etchant gas so as to allow the etchant gas to physically, or chemically and physically, remove the portion of silicon; performing a second etch to remove additional silicon, the second etch comprising providing an etchant gas that chemically but not physically etches the additional silicon.
Abstract:
A method for producing a micromechanical structure, and a micromechanical structure having a movable structure and a stationary structure made of silicon. In the method for producing the micromechanical structure, in one process step, a superficial metal-silicide layer is produced in the movable structure and/or the stationary structure.
Abstract:
A method for fabricating an adhesion-resistant microelectromechanical device is disclosed wherein amorphous hydrogenated carbon is used as a coating or structural material to prevent adhesive failures during the formation and operation of a microelectromechanical device.
Abstract:
A monolithic capacitance-type microstructure includes a semiconductor substrate, a plurality of posts extending from the surface of the substrate, a bridge suspended from the posts, and an electrically-conductive, substantially stationary element anchored to the substrate. The bridge includes an element that is laterally movable with respect to the surface of the substrate. The substantially stationary element is positioned relative to the laterally movable element such that the laterally movable element and the substantially stationary element form a capacitor. Circuitry may be disposed on the substrate and operationally coupled to the movable element and the substantially stationary element for processing a signal based on a relative positioning of the movable element and the substantially stationary element. A method for fabricating the microstructure and the circuitry is disclosed.
Abstract:
It is possible to use an oriented monolayer to limit the Van der Waals forces between two elements by passivation. The invention disclosed here details how to do so by building the device to be passivated, cleaning the surface to be passivated, activating the surface, heating it along with the material to be used as the monolayer, exposing a vapor of the material to the surface and evacuating the excess material, leaving only the monolayer.
Abstract:
A MEMS device and a method for manufacturing a MEMS device are disclosed. An embodiment of the present invention comprises a step of forming trenches on a first main surface of a substrate; a step of forming conductive fingers by filling the trenches with conductive materials; and a step of exposing the conductive fingers by forming an opening on a second main surface of the substrate opposite to the first main surface.
Abstract:
PURPOSE: A wafer level protection structure of a micro device, the micro device including the same, and manufacturing methods thereof are provided to efficiently protect a driving part of the micro device by installing a wafer level protection structure in a contact part with the driving part of the micro device. CONSTITUTION: An elastic spacer(32A) is formed on a first surface of a substrate(30). The elastic spacer is made of a silicon resin. The silicon resin is one of PMDS(Polydimethylsiloxane), PMPS(Polymethylphenylsiloxane), and PVS(Polyvinylsiloxane). A adhesion preventing layer(34) is formed on the first surface inside the spacer and is one of a metal layer, an oxide layer, and a nitride layer. The oxide layer includes one of Al2O3, TiO2, Cr2O3, Ta2O3, and LTO.
Abstract translation:目的:提供微型器件的晶片级保护结构,包括微型器件的微型器件及其制造方法,以通过将晶片级保护结构安装在与驱动部分的接触部分中来有效地保护微型器件的驱动部分 的微器件。 构成:在基板(30)的第一表面上形成弹性间隔件(32A)。 弹性间隔物由硅树脂制成。 硅树脂是PMDS(聚二甲基硅氧烷),PMPS(聚甲基苯基硅氧烷)和PVS(聚乙烯基硅氧烷)之一。 在隔离物的第一表面上形成有防粘附层(34),并且是金属层,氧化物层和氮化物层之一。 氧化物层包括Al 2 O 3,TiO 2,Cr 2 O 3,Ta 2 O 3和LTO中的一种。
Abstract:
본 발명은, 반도체 기계 구조체에 있어서, 외부로부터 충격이 가해져도 힌지가 파손되지 않도록 하여, 내(耐)충격성을 높인다. 광주사(光走査) 미러(1)는, 가동판(可動板)(2)과, 가동판(2)의 양 측부에 일단부가 각각 접속되어 있고, 가동판(2) 중 1개의 요동축(搖動軸)을 구성하는 한쌍의 힌지(3)와, 가동판(2)의 주위를 에워싸도록 배치되어 각 힌지(3)의 타단부를 지지하는 고정 프레임(4)과, 고정 프레임(4)에 형성된 스토퍼부(6)를 포함하고 있다. 가동판(2)이 측방으로 변위되면, 스토퍼부(6)가 가동판(2)의 오목부(2e) 측 에지부와 접촉하고, 가동판(2)의 측방으로의 변위가 제한된다. 이로써, 외부로부터 충격이 가해져도 힌지(3)의 파손이 방지된다.
Abstract:
The invention relates to measuring devices used for the measuring of acceleration, and specifically to capacitive acceleration sensors. The capacitive acceleration sensor according to the present invention comprises a pair of electrodes composed of a movable electrode ( 4 ) and a stationary electrode ( 5 ), and, related to the pair of electrodes, an isolator protrusion having a special coating. The invention provides an improved, more durable sensor structure, which withstands wear caused by overload situations better than earlier structures.