Abstract:
A wafer-level packaging method for MEMS structures that are desired to be encapsulated in a hermetic cavity and that need the transfer of at least a single or multiple electrical leads to the outside of the cavity without destroying the hermeticity of the cavity. Lead transfer is achieved using vertical feedthroughs that are patterned on the capping substrate within the same fabrication step to produce the encapsulating cavity. Furthermore, the structure of the vertical feedthroughs and via openings to reach these feedthroughs are arranged in such a way that conventional wirebonding would be sufficient to connect the vertical feedthroughs to the outer world, without a need for conductor-refill inside the via openings. The method is compatible with low-temperature thermocompression-based bonding/sealing processes using various sealing materials such as thin- film metals and alloys, and also with the silicon-glass anodic or silicon-silicon fusion bonding processes.
Abstract:
A wafer-level packaging method for SOI-MEMS structures that are desired to be encapsulated in a hermetic cavity with electrical leads to the outside without destroying the hermeticity of the cavity. The MEMS devices and vertical feedthroughs are both fabricated on the same SOI wafer, whereas a glass or silicon wafer is used for capping and routing metallization. The method requires at most five process masks and a single SOI wafer. Compared to the existing packaging technologies it reduces the number of wafers, process masks, and process steps. Conventional wirebonding is sufficient to connect the vertical feedthroughs to the outer world, without a need for conductor-refill inside the via openings. The method is compatible with low-temperature thermo-compression-based bonding/sealing processes and also with the silicon-glass anodic or silicon-silicon fusion bonding processes, which do not require any sealing material for bonding/sealing. The simplified process increase the reliability and yield in addition to lowering the manufacturing costs of hermetically-sealed MEMS components with the present invention.
Abstract:
This invention relates to a robust, microwave biosensor fabricated using MEMS fabrication techniques for highly sensitive and selective, rapid, label-free detection of biological or chemical substances. The biosensor subjected to this invention can be used for In-vitro, Point-of-care diagnostics which can have wide range of applications covering environmental monitoring, drug-discovery, disease diagnosis etc.
Abstract:
This invention is related with electrical energy conversion device, which uses built-in potential of metal-to-metal junctions from repeating movements with random frequencies, speeds and amplitudes at the medium of the device. The device using the method does not rely on a resonant frequency, besides, it can convert the kinetic energy to electrical energy even at low frequencies. Furthermore, its application to the real life situations is economic and beneficial because of the efficient working principle and simple structure. Unique design of the device enables direct wiring of the outputs of identical or similar devices together for the purpose of power scaling without the need of using another device, which may cause energy losses and increase the total cost. This device also does not require a dummy voltage source or a precharge at the beginning of energy harvesting since it makes use of the built-in potential difference of different metals used in shuttle and electrodes of the device.
Abstract:
Micromachined, CMOS p+-active/n-well diodes are used as infrared sensing elements in uncooled Focal Plane Arrays (FPA). The FPAs are fabricated using a standard CMOS process followed by post-CMOS bulk-micromachining steps without any critical lithography or complicated deposition processes. Micromachining steps include Reactive Ion Etching (RIE) to reach the bulk silicon and anisotropic silicon wet etching together with electrochemical etch-stop technique to obtain thermally isolated p+-active/n-well diodes. The FPAs are monolithically integrated with their readout circuit since they are fabricated in any standard CMOS technology.
Abstract:
The invention relates to a three axis capacitive mems accelerometer on a single substrate. In this invention a varying gap differential capacitive sensing three-axis accelerometer using SOI on glass process is introduced. The out of plane axis accelerometer which is developed in the present invention can be used for fabrication of either a three axis accelerometer with a single proof mass or an individual single axis accelerometers on the same substrate. Additionally the out of plane axis accelerometer which is developed in the present invention, the handle layer of the SOI wafer is used as packaging layer.
Abstract:
The invention relates to provide a method for suppression of the g-sensitivity of MEMS gyroscope (1) by keeping the movable sense frame of the gyroscope stationary irrespective to the external accelerations with the aid of closed-loop feedback circuit (2).
Abstract:
This disclosure discusses various methods for manufacturing uncooled infrared detectors by using foundry-defined silicon-on-insulator (SOI) complementary metal oxide semiconductor (CMOS) wafers, each of which may include a substrate layer, an insulation layer having a pixel region and a wall region surrounding the pixel region, a pixel structure formed on the pixel region of the insulation layer, a wall structure formed adjacent to the pixel structure and on the wall region of the insulation layer, a dielectric layer covering the pixel structure and the wall structure, a pixel mask formed within the dielectric layer and for protecting the pixel structure during a dry etching process, and a wall mask formed within the dielectric layer and for protecting the wall structure during the dry etching process, thereby releasing a space defined between the wall structure and the pixel structure after the dry etching process.
Abstract:
This invention relates to techniques for controlling the amplitude and the insertion phase of an input signal in RF applications. More particularly, this invention relates to phase shifters, vector modulators, and attenuators employing both semiconductor and RF microelectromechanical systems (MEMS) technologies.