Abstract:
PROBLEM TO BE SOLVED: To surely remove a silicon oxide formed during fabrication in a semiconductor element provided with a semiconductor substrate 101, a cavity 129 and a coating layer 150 formed from a porous silicon material and provided on the cavity. SOLUTION: The coating layer has a first partial region 122 and second partial regions 121, 125, 126. A porosity structure of the first partial region in a prior phase is different from a porosity structure of the second partial regions in the prior phase. COPYRIGHT: (C)2004,JPO
Abstract:
In one embodiment, a method of forming an out-of-plane electrode includes forming an oxide layer above an upper surface of a device layer, etching an etch stop perimeter defining trench extending through the oxide layer, forming a first cap layer portion on an upper surface of the oxide layer and within the etch stop perimeter defining trench, etching a first electrode perimeter defining trench extending through the first cap layer portion and stopping at the oxide layer, depositing a first material portion within the first electrode perimeter defining trench, depositing a second cap layer portion above the deposited first material portion, and vapor releasing a portion of the oxide layer with the etch stop portion providing a lateral etch stop.
Abstract:
The invention relates to a method for producing a micromechanical component and to a corresponding micromechanical component. The production method comprises the following steps: providing a substrate (1) with a monocrystalline starting layer (1c) which is exposed in structured regions (3a-3e), said structured regions (3a-3e) having an upper face (O) and lateral flanks (F), wherein a catalyst layer (2), which is suitable for promoting a silicon epitaxial growth of the exposed upper face (O) of the structured monocrystalline starting layer (1c), is provided on the upper face (O), and no catalyst layers (2) are provided on the flanks (F); and carrying out a selective epitaxial growth process on the upper face (O) of the monocrystalline starting layer (1c) using the catalyst layer (2) in a reactive gas atmosphere in order to form a micromechanical functional layer (3').
Abstract:
The invention relates to a method for the production of MEMS structures with at least one functional layer of silicon that contains structures that are released by the removal of a sacrificial layer, with at least one sacrificial layer and at least one functional layer, precipitated in such a way that they grow monocrystalline, and with the sacrificial layer consisting of a mixed silicon-germanium layer.
Abstract:
Es wird ein Halbleiterbauelement und ein Verfahren vorgeschlagen, wobei ein Halbleitersubstrat (101) vorgesehen ist, wobei ein erster Teilbereich (122) und ein zweiter Teilbereich (121, 125, 126) vorgesehen ist, wobei sich die Porenstruktur des ersten Teilbereichs von der Porenstruktur des zweiten Teilbereichs unterscheidet.
Abstract:
A silicon pressure sensor (10) shows an epitaxial layer (epilayer) (21,20) wrapped up around the edge of a cavity (15), which may be defined by an oxide layer etched away. The epitaxial layer (21,20) forms a membrane (19) with a piezoresistor (18). Alternatively a capacitance sensor may be used. Vent holes (14) are shown as vertical slots. Epitaxial silicon layer (17) grows as a single crystal on the side walls of the vent holes (14) and pinch them off by forming plugs (17) as an epitaxial seal (episeal).