Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of causing floating of a movable machine part in a microelectromechanical system. SOLUTION: This method is characterized by forming a porous zone on a front face of a first wafer of a semiconductor material. A pattern of the material suitable for constituting the movable machine part of the microelectromechanical system is formed on the front face of the first wafer covered in a sacrificial layer and positioned on a level of the porous zone. A layer being the material endurable against an attack by a solution for the sacrificial layer is also formed. The floating of the movable machine part is performed from a reverse surface of the first wafer, through the porous zone by help of the solution for the sacrificial layer. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
The present publication discloses a method for forming cavities in prefabricated silicon wafers comprising a first silicon layer ( 1 ), a second monocrystalline silicon layer, or a so-called structural layer ( 3 ), oriented substantially parallel with said first silicon layer ( 1 ) and an insulating layer ( 2 ) situated between said first and second layers ( 1, 3 ). According to the method, in at least one of the conducting silicon layers ( 1, 3 ) are fabricated windows ( 4 ) extending through the thickness of the layer, and cavities are etched in the insulating layer ( 2 ) by means of etchants passed to the layer via said fabricated windows ( 4 ). According to the invention, subsequent to the fabrication step of the windows ( 4 ) and prior to the etching step, a thin porous layer ( 5 ) is formed on the surface to be processed such that the etchants can be passed through said porous layer into said cavities ( 6 ) being etched and, after the cavities ( 6 ) are etched ready, at least one supplementary layer ( 7 ) is deposited in order to render to the material of said porous layer impermeable to gases.
Abstract:
An example provides a method including sputtering a metal catalyst onto a substrate, exposing the substrate to a solution that reacts with the metal catalyst to form a plurality of pores in the substrate, and etching the substrate to remove the plurality of pores to form a recess in the substrate.
Abstract:
The invention relates to a method for producing porous microstructures (8, 8') in an Si semiconductor substrate (1), to porous microstructures (8, 8') produced according to this method and to the use thereof.
Abstract:
Une membrane (1) absorbante est fixée en suspension sur une face avant d'un substrat (2), sensiblement parallèlement au substrat (2), par au moins une structure alvéolée isolant thermiquement la membrane du substrat (2) et disposée dans un plan sensiblement perpendiculaire au substrat (2). Le détecteur peut comporter des bras (3) solidaires de la membrane (1) absorbante. Les structures alvéolées peuvent être disposées respectivement entre l'un des bras (3) et le substrat (2). La structure alvéolée peut être constituée par une pluralité de couches minces (6) superposées et séparées par des entretoises (7) ou par des rangées superposées d'arcades constituées par des couches minces. La structure alvéolée peut comporter un plot poreux.
Abstract:
The invention relates to a method for producing a semiconductor component (100; ...; 700), particularly a multilayer semiconductor component, preferably a micromechanical component such as, in particular, a heat-conducting sensor, which has a semiconductor substrate (101), particularly made of silicon, and a sensor area (404). The aim of the invention is to economically produce a thermal insulation between the semiconductor substrate (101) and the sensor area (404). To this end, a porous layer (104; 501) is provided in the semiconductor component (100; ...; 700).
Abstract:
Es wird eine einfache und kostengünstige Möglichkeit zur Erzeugung optisch transparenter Bereiche (5, 6) in einem Siliziumsubstrat (1) vorgeschlagen, mit dem sich sowohl optisch transparente Bereiche beliebiger Dicke als auch optisch transparente Bereiche über einem Hohlraum im Siliziumsubstrat realisieren lassen. Dazu wird zunächst mindestens ein definierter Bereich (5, 6) des Siliziumsubstrats (1) porös geätzt. Danach wird der definierte poröse Bereich (5, 6) des Siliziumsubstrats (1) oxidiert.
Abstract:
Die Erfindung betrifft insbesondere ein Verfahren zur Herstellung eines Halbleiterbauelements (100; ...; 700), insbesondere ein mehrschichtiges Halbleiterbauelement, vorzugsweise ein mikromechanisches Bauelement, wie insbesondere ein Wärmeleitsensor, das ein Halbleitersubstrat (101), wie insbesondere aus Silizium, und einen Sensorbereich (404) aufweist. Zur kostengüngstigen Herstellung einer thermischen Isolierung zwischen dem Halbleitersubstrat (101) und dem Sensorbereich (404) wird erfindungsgemäss eine poröse Schicht (104; 501) in dem Halbleiterbauelement (100; ...; 700) vorgesehen.