Abstract:
Ein Bauelement für integrierte Sensoren, insbesondere für IR-Sensoren, hat ein Substrat (1), in dem eine Schaltung bzw. Bauelemente der Ausleseelektronik integriert ist/sind. Auf dem Substrat (1) ist eine Hilfsschicht angeordnet, die mit ein oder mehreren abgeschlossenen oder evakuierten Hohlräumen (3a) versehen ist. Eine Membran (4) schließt die Hohlräume (3a) nach oben hin ab, so dass ein Sensorelement vertikal in Bezug auf die Ausleseelektronik angeordnet werden kann. In Stützstrukturen (5) aus Si-Oxid befinden sich Metallisierungen (7), die sich senkrecht durch den Hohlraum (3a) erstrecken, um die vertikal angeordneten Sensorelemente und Ausleseschaltungen elektrisch zu verbinden.
Abstract:
In a process for manufacturing a micromechanical component, a 5 nm to 50 nm thick oxide or nitride layer is deposited as a protective layer (6) on a functional element (4) made of polysilicon by LPCVD (low pressure chemical vapour deposition).
Abstract:
A method of fabricating an infrared sensitive bolometer, comprising the steps of: forming a sacrificial layer (11, 12 or 43) on a substrate (10 or 41); patterning said sacrificial layer (11, 12 or 43) ; depositing or growing a layer (13 or 42) consisting essentially of polycrystalline SiGe on said sacrificial layer; depositing an infrared absorber (49) on said polycrystalline SiGe layer; removing the sacrificial layer (11, 12 or 43).
Abstract:
In one embodiment, a method of forming a MEMS device includes providing a substrate, forming a sacrificial layer above the substrate layer, forming a silicon based working portion on the sacrificial layer, releasing the silicon based working portion from the sacrificial layer such that the working portion includes at least one exposed outer surface, forming a first layer of silicide forming metal on the at least one exposed outer surface of the silicon based working portion, and forming a first silicide layer with the first layer of silicide forming metal.
Abstract:
A micromechanical device has a functional layer. One or more layers are provided between the functional layer and the micromechanical device to provide stress relief.
Abstract:
A micromechanical device has a functional layer. One or more layers are provided between the functional layer and the micromechanical device to provide stress relief.
Abstract:
The invention relates to a method for producing a micromechanical component (10), encompassing the following steps: a first electrode unit (14) is formed in a first position relative to a bottom substrate (16); a supporting element (22) is formed which comprises a first subunit (23, 28, 30) having a first internal stress and a second subunit (23, 28, 30) having a second internal stress that differs from the first internal stress, said supporting element (22) being fastened to the first electrode unit (14) at a first end while being fastened to the bottom substrate (16) at a second end; and the supporting element (22) is bent as a result of the difference between the first internal stress and the second internal stress, the bending action causing the first electrode unit (14) to be moved from the first position relative to the bottom substrate (16) into a second position relative to the bottom substrate (16). The invention further relates to a micromechanical component (10).
Abstract:
Methods of forming a protective coating on one or more surfaces of a microelectromechanical device are disclosed comprising the steps of forming a composite layer of a sacrificial material and a protective material, and selectively etching the sacrificial material to form a protective coating. The protective coatings of the invention preferably improve one or more aspects of the performance of the microelectromechanical devices in which they axe incorporated. Also disclosed are microelectromechanical devices formed by methods of the invention, and visual display devices incorporating such devices.
Abstract:
A method of fabricating a vertical actuation comb drive first etches a cavity in a semiconductive wafer; then the comb structure is etched, and the fixed part of the structure is deformed by an induced strain, by techniques such as boron doping, by adding a metal layer or a fixed oxide, or a mechanical latch or an additional plate electrode. In a manner known in the art, application of a voltage across the fingers of the comb produces a deflection either tilting or a vertical movement in the moveable portion of the comb drive.
Abstract:
A membrane structure (10) comprising a silicon film of thickness (T) having a grain structure including grains (12) of diameter (D) separated by grooves (14) thereby defining pores (16) with lateral dimension (L) therebetween.