摘要:
An integrated resonator apparatus includes a piezoelectric resonator and an acoustic Bragg reflector formed adjacent the piezoelectric resonator. The integrated resonator apparatus also includes a mass bias formed over the Bragg reflector on a side of the piezoelectric resonator opposite the piezoelectric resonator.
摘要:
Devices having piezoelectric material structures integrated with substrates are described. Fabrication techniques for forming such devices are also described. The fabrication may include bonding a piezoelectric material wafer to a substrate of a differing material. A structure, such as a resonator, may then be formed from the piezoelectric material wafer.
摘要:
A method for producing a disk resonator gyroscope includes providing a base substrate and a handle wafer with a release hole, bonding a release wafer to the handle wafer, bonding a resonator wafer to the release wafer, etching the resonator wafer to form a disk resonator with a central pillar, and sense and drive electrodes, selectively applying a conductive film onto the disk resonator on a side of the disk resonator opposite the release wafer, on the outer edge of the disk resonator, and on the surfaces of the sense and drive electrodes facing the outer edge of the disk resonator, bonding the sense and drive electrodes and the central pillar of the disk resonator to the base substrate, and releasing the handle wafer by introducing a dry release agent into the release hole to undercut the release wafer.
摘要:
Methods and apparatus for temperature control of devices and mechanical resonating structures are described. A mechanical resonating structure may include a heating element and a temperature sensor. The temperature sensor may sense the temperature of the mechanical resonating structure, and the heating element may be adjusted to provide a desired level of heating. Optionally, additional heating elements and/or temperature sensors may be included.
摘要:
A crystal oscillator and manufacturing method thereof are provided. The crystal oscillator includes: a semiconductor substrate; an interlayer dielectric layer located on the surface of the semiconductor substrate, an excitation plate and a positive electrode plug and a negative electrode plug being formed inside the interlayer dielectric layer, and the positive electrode plug and the negative electrode plug being located at the both sides of the excitation plate; a bottom cavity on top of the excitation plate, located between the positive electrode plug and the negative electrode plug; a vibrating crystal located on the surface of the interlayer dielectric layer, across the bottom cavity and connected with the positive electrode plug and the negative plug, wherein the vibrating crystal connects the positive electrode plug and the negative electrode plug at its both sides and besides the other both sides are the free ends and do not contact with the surrounding objects; an isolating layer located on top of the interlayer dielectric layer, a gap between the isolating layer and the vibrating crystal thus forming a top cavity; a covering layer formed on the surface of the isolating layer. The crystal oscillator is manufactured based on Complementary Metal-Oxide-Semiconductor Transistor (CMOS) technology, and can be integrated into the semiconductor chip easily and can meet the requirement for the miniature components.
摘要:
The invention specifies a module comprising a carrier substrate (6) having an electrical wiring and a component chip mounted on the carrier substrate (6) using flip-chip technology, wherein the component chip (1) has, on its surface (2) facing the carrier substrate (6), component structures (3), a supporting frame (4) and supporting elements (5), the supporting elements (5) produce an electrical connection between the component structures (3) and the electrical wiring of the carrier substrate (6), and the height of the supporting elements and the height of the supporting frame (4) correspond. Furthermore, the invention specifies a method for producing the module.
摘要:
A hybrid system having a non-MEMS device and a MEMS device is described. The apparatus includes a non-MEMS device and an integrated circuit including a MEMS device, the integrated circuit formed on a substrate. The integrated circuit includes a control circuit for the non-MEMS device and a MEMS control circuit for the MEMS device.
摘要:
In a MEMS device having a substrate 1, a sealing membrane 7, and a movable portion 3 of beam and an electrode 5 which have a region wherein they overlap with a gap in perpendicular to a substrate 1 surface, a first cavity 9 is on the side of the movable portion 3 in the direction perpendicular to the surface of the substrate, and a second cavity is the other cavity, and an inner surface a of a side wall A in contact with the electrode 5, of the first cavity 9, is positioned more inside than an inner surface b of a side wall B in contact with the electrode 5, of the second cavity 10, in the direction parallel to the substrate surface, such that the movable portion 3 does not collide with the electrode 5 when mechanical stress is applied from outside to the sealing membrane 7.
摘要:
The invention relates to temperature compensated micro-electro-mechanical (MEMS) resonators (300) preferably made of silicon. Prior art MEMS resonators have a significant temperature coefficient of resonance frequency, whereby it is difficult to achieve a sufficiently good frequency stability. The inventive MEMS resonator has a resonance plate (310) which resonates in Lamé mode. The resonance plate is p+ doped material, such as silicon doped with boron, and the concentration of the p+ doping is such that the plate has a temperature coefficient of resonance frequency near to zero. The tensile stress and the second order temperature coefficient can further be reduced by doping the plate with germanium.
摘要:
The invention relates to an encapsulation (4) of a sensitive component structure (3) on a semiconductor substrate (2) with a film (5) covering the component structure (3). According to the invention, it is provided that a cavity (8) for the component structure (3) is provided in the film (5). The invention also relates to a MEMS (1) and to a method for encapsulating a sensitive component structure (3).