Abstract:
The invention relates to a micromechanical component comprising: a substrate (1); a monocrystalline layer (10), which is provided above the substrate (1) and which has a membrane region (10a); a cavity (50) that is provided underneath the membrane region (10a), and; one or more porous regions (150; 150'), which are provided inside the monocrystalline layer (10) and which have a doping (n ; p ) that is higher than that of the surrounding layer (10).
Abstract:
The invention concerns a micromechanical sensor and a method for the production thereof. According to the invention, the diaphragm can be reliably mounted regardless of process- related vibrations of the cavern etching process and the diaphragm can be provided in any shape due to the fact that a suitable binding of the diaphragm in an oxide layer produced by local oxidation is formed. The micromechanical sensor comprises: at least one substrate (1); an outer oxide layer (9) formed in a laterally outer region (4) in the substrate (1); a diaphragm (15) formed in a laterally inner diaphragm region (5) and having a number of perforations (16), and; a cavern (14) etched into the substrate (1) underneath the diaphragm (15), said diaphragm (15) being suspended in a suspending region (10) of the outer oxide layer (9), this region tapering toward the binding points (12) of the diaphragm (15), and the diaphragm (15) is, in the vertical height thereof, placed between a top side (17) and an underside (19) of the outer oxide layer (9).
Abstract:
An isolation method for a single crystalline silicon microstructure using a triple layer structure is disclosed. The method includes forming the triple layer composed of an insulation layer formed over an exposed surface of the silicon microstructure, a conductive layer formed over the entire insulation layer, and a metal layer formed over a top portion of the microstructure; and partially etching the conductive layer to form electrical isolation between parts of the microstructure. The method does not require a separate photolithography process for isolation, and can be effectively applied to microstructures having high aspect ratios and narrow trenches. Also disclosed are single crystalline silicon microstructures having a triple layer isolation structure formed using the disclosed method.
Abstract:
A method for forming a micro cavity is disclosed. In the method for forming the cavity, a first layer is formed on a silicon layer and a trench is formed in the silicon layer by selectively etching the silicon layer. A second and a third layers are formed on the trench and on the silicon layer. Etching holes are formed through the third layer by partially etching the third layer. A cavity is formed between the silicon layer and the third layer after the second layer is removed through the etching holes. Therefore, the cavity having a large size can be easily formed and sealed in the silicon layer by utilizing the volume expansion of the silicon or the poly silicon layer. Also, a vacuum micro cavity can be formed according as a low vacuum CVD oxide layer or a nitride layer formed on the etching holes which are partially opened after the thermal oxidation process by controlling the size of the etching holes concerning the other portion of the poly silicon layer.
Abstract:
본 발명은 마이크로 기계식 센서 및 이를 제조하는 방법에 관한 것이다. 본 발명에 따르면, 멤브레인은 캐번 에칭 공정의 공정 관련 진동에 관계없이 신뢰성있게 장착될 수 있고, 국부적인 산화에 의해 생성된 산화층 내에 멤브레인의 적절한 접합이 형성되는 점으로부터 멤브레인은 어떠한 형상으로도 제공될 수 있다. 마이크로 기계식 센서는 적어도 하나의 기판(1)과, 기판(1) 내의 측방향 외부 영역(4)에 형성된 외부 산화층(9)과, 측방향 내부 멤브레인 영역(5)에 형성되고 수많은 관통구를 갖는 멤브레인(15)과, 멤브레인(15) 하부에 기판(1)내로 에칭성형된 캐번(14)을 포함한다. 멤브레인(15)은 외부 산화층(9)의 현수 영역(10)에 현수되어 있고, 현수 영역은 멤브레인(15)의 접합점(12)을 향하여 테이퍼져 있다. 멤브레인(15)은 그 수직방향 높이가 외부 산화층(9)의 상단부(17)와 하단부(19) 사이에 위치해 있다. 센서, 멤브레인, 캐번, 에칭, LOCOS 구조
Abstract:
A substrate is provided with a substrate main body made from silicon, and an oxide film for a base formed thereon. The oxide film includes a first oxide film made mainly of a thermal SiO 2 film formed by thermally oxidizing silicon in the substrate main body, and a second oxide film made of a high-temperature oxide film deposited and formed thereon. Alternatively the second oxide film may be formed by TEOS.
Abstract:
PURPOSE: A method for forming a micro cavity structure hermetically sealed with a planar silicon oxide layer on a silicon substrate is provided with a simplified process and an improved planarity. CONSTITUTION: In the method, the silicon substrate(1) is selectively etched to form a plurality of narrow trenches in a region where a cavity(6) will be formed. The first silicon oxide layer is then formed in the trenches by the first thermal oxidation. Next, a portion of the first silicon oxide layer growing on a surface of the silicon substrate(1) is removed by etch. After that, a polysilicon layer is deposited on an entire resultant structure and then selectively etched to form a plurality of small apertures exposing the region of the cavity(6). Thereafter, the first silicon oxide layer is removed by wet etch through the apertures in the polysilicon layer, so that the cavity(6) is formed in the silicon substrate(1). Next, by the second thermal oxidation, the polysilicon layer is turned into the planar silicon oxide layer(2), while the apertures are clogged up by cubical expansion.
Abstract in simplified Chinese:一种微机械构件,具有一功能区域(3)及一载体基材(1),其中该载体基材(1)有一渠沟构造(2),平行于该载体基材(1)的主延伸平面(1'),其中该渠沟构造(2)的表面被一第一绝缘层(20)盖住,且其中该渠沟构造(2)有一上表面平面(5),平行于主延伸平面(1')且延伸过该渠沟构造(2)的载体基材(1)的一上缘(5'),其中:该渠沟构造(2)的至少一渠沟(10)用一种半导体材料(30)充填,其中该功能区域(5)沿一垂直于该主延伸平面(1')的方向系设在该载体基材(1)的上表面平面下方。此外还关于这种微机械构件的制造方法。