Abstract:
Material structures and methods for etching hexagonal, single-crystal silicon carbide (SiC) materials are provided, which include selection of on-axis or near on-axis hexagonal single-crystal SiC material as the material to be etched. The methods include etching of SiC bulk substrate material, etching of SiC material layers bonded to a silicon oxide layer, etching of suspended SiC material layers, and etching of a SiC material layer anodically bonded to a glass layer. Plasma-etched hexagonal single- crystal SiC materials of the invention may be used to form structures that include, but are not limited to, microelectromechanical beams, microelectromechanical membranes, microelectromechanical cantilevers, microelectromechanical bridges, and microelectromechanical field effect transistor devices. The material structures and methods of the invention beneficially provide improved etch symmetry, improved etch straightness, improved sidewall straightness, improved sidewall smoothness, and reduced sidewall wander compared to etched four degree off-axis SiC materials.
Abstract:
Microelectromechanical systems (MEMS) having contaminant control features. In some embodiments, a MEMS die can include a substrate and an electromechanical assembly implemented on the substrate. The MEMS die can further include a contaminant control component implemented relative to the electromechanical assembly. The contaminant control component can be configured to move contaminants relative to the electromechanical assembly. For example, such contaminants can be moved away from the electromechanical assembly.
Abstract:
이동하는 물질의 질량에 따라 공진 주파수가 변화하는 원리를 이용하여 목적물의 질량 및 특성을 측정할 수 있는 미세채널 공진기 제조방법은, 실리콘기판을 제공하는 단계, 실리콘기판의 내부에 공동 채널(cavity channel)을 형성하는 단계, 공동 채널의 내부 벽면을 산화시켜 공동 채널의 내부 벽면에 중공형 산화실리콘 구조체를 형성하는 단계, 및 중공형 산화실리콘 구조체가 실리콘기판에 대해 공진 운동 가능하도록 중공형 산화실리콘 구조체의 주변을 부분적으로 제거하는 단계를 포함한다.
Abstract:
In embodiments, a package assembly may include an application-specific integrated circuit (ASIC) and a microelectromechanical system (MEMS) having an active side and an inactive side. In embodiments, the MEMS may be coupled directly to the ASIC by way of one or more interconnects. The MEMS, ASIC, and one or more interconnects may define or form a cavity such that the active portion of the MEMS is within the cavity. In some embodiments, the package assembly may include a plurality of MEMS coupled directly to the ASIC by way of a plurality of one or more interconnects. Other embodiments may be described and/or claimed.
Abstract:
A junctionless Nano-Electro-Mechanical (NEM) resonator, comprising a highly doped conductive channel (4) connecting a drain (9) and a source (10) electrode and movably fixed by at least two ends (11, 11') acting as said source and drain electrodes, respectively; at least one fixed gate electrode (3, 3') arranged to control a depletion charge (5) in the highly doped conductive channel (4) thereby modulating dimensions of a cross-section of the highly doped conductive channel (4). A dimension of the cross-section in the direction of an electrical field that is oriented from the fixed gate electrode (3, 3') to the highly doped conductive channel (4), is designed in such a way that it can be reduced under the effect of the depletion charge such that a full depletion in the highly doped conductive channel (4) is achievable with the control of the fixed gate electrode.
Abstract:
The present invention relates to a method of manufacturing a capacitive micro- machined transducer (100), in particular a CMUT, the method comprising depositing a first electrode layer (10) on a substrate (1), depositing a first dielectric film (20) on the first electrode layer (10), depositing a sacrificial layer (30) on the first dielectric film (20), the sacrificial layer (30) being removable for forming a cavity (35) of the transducer, depositing a second dielectric film (40) on the sacrificial layer (30), depositing a second electrode layer (50) on the second dielectric film (40), and patterning at least one of the deposited layers and films (10, 20, 30, 40, 50), wherein the depositing steps are performed by Atomic Layer Deposition. The present invention further relates to a capacitive micro-machined transducer (100), in particular a CMUT, manufactured by such method.
Abstract:
Ce dispositif de génération d'une seconde variation ΔΤ 2 de température à partir d'une première variation ΔΤ 1 de température d'utilisation, comporte: - une couche (30) en matériau élastocalorique dont la température interne est apte à varier de ΔΤ 2 en réponse à une variation donnée Δσ d'une contrainte mécanique appliquée sur cette couche en matériau élastocalorique, la variation donnée Δσ étant induite par la première variation ΔΤ 1 de température - un élément suspendu (24) en contact mécanique avec la couche en matériau élastocalorique de manière à appliquer sur cette couche une contrainte mécanique qui varie en réponse à la variation ΔΤ 1 de température d'utilisation, cet élément suspendu (24) étant agencé de manière à faire varier de Δσ la contrainte mécanique appliquée sur la couche en matériau élastocalorique en réponse à la variation ΔΤ 1 de température pour générer ainsi la seconde variation ΔΤ 2 de température.
Abstract:
A microelectromechanical system (MEMS) solar cell device. The MEMS solar cell device includes a substrate, a sensing membrane exposed to light radiation being spaced from the substrate, a collector electrode disposed between the substrate and the sensing membrane, and a cavity defined between the sensing membrane and the collector electrode. The collector electrode collects charge carriers generated by light radiation on the sensing membrane within the cavity. A solar module or panel may be provided including a plurality of the cells arranged in an array on a substrate.
Abstract:
The invention concerns a micromechanical device and method of manufacturing thereof. The device comprises an oscillating or deflecting element (16) made of semiconductor material comprising n-type doping agent and excitation or sensing means (10, 14) functionally connected to said oscillating or deflecting element (16). According to the invention, the oscillating or deflecting element (16) is essentially homogeneously doped with said n-type doping agent. The invention allows for designing a variety of practical resonators having a low temperature drift.