Abstract:
A semiconductor substrate comprising at least a buried insulating cavity (10b, 10d) and comprising: - a semiconductor substrate (7) having a first type of concentration and having a plurality of trenches (8, 10), - a surface layer (7a, 9a) on said semiconductor substrate (7) in order to close superficially said plurality of trenches (8, 10) forming said at least a buried insulating cavity (10b, 10d); - a first semiconductor material layer (9) on said surface layer (7a, 9a) having the same first type of concentration as said semiconductor substrate (7), said first semiconductor material layer (9) comprising at least a trench (11) which is in communication with said at least a buried insulating cavity (10b, 10d).
Abstract:
A process for manufacturing a MEMS pressure sensor (42) having a micromechanical structure (35) envisages: providing a wafer (1) having a substrate of semiconductor material and a top surface (2a); forming a buried cavity (10) entirely contained within the substrate (2) and separated from the top surface (2a) by a membrane (12) suspended above the buried cavity (10); forming a fluidic-communication access (22; 37) for fluidic communication of the membrane (12) with an external environment, set at a pressure the value of which has to be determined; forming, suspended above the membrane (12), a plate region (30) made of conductive material, separated from the membrane (12) by an empty space (24); and forming electrical-contact elements (30a, 30b) for electrical connection of the membrane (12) and of the plate region (30), which are designed to form the plates of a sensing capacitor (C), the value of capacitance of which is indicative of the value of pressure to be detected. A corresponding MEMS pressure sensor (42) having the micromechanical structure (35) is moreover described.
Abstract:
Die Erfindung betrifft ein Verfahren zur einfachen Herstellung von Nanostrukturen. Dies wird durch die strukturierte Bestrahlung eines beschichteten Substrats erreicht, welches eine Beschichtung mit einer Dicke von unter 500 nm aufweist. Durch strukturierte Bestrahlung kommt es zur Ausbildung von Nanostrukturen, welche auch von dem Substrat abgelöst werden können.
Abstract:
Die Erfindung beschreibt ein Verfahren zur Herstellung eines Halbleiterbauelements, insbesondere eines mikromechanischen Membransensors, sowie ein Halbleiterbauelement nach einem der beanspruchten Herstellungsverfahren, mit einem Halbleiterträger, einer Membran und einer Kaverne.
Abstract:
The invention relates to a method for producing micromechanic sensors, and the sensors produced thereby, in which openings (2) are made in a semiconductor substrate (1). A subsequent temperature treatment is carried out after the openings (2) have been made in the semiconductor substrate (1), converting said openings (2) into cavities in the depth of the substrate (1).