Abstract:
A method and structure for a PLCSP (Package Level Chip Scale Package) MEMS package. The method includes providing a MEMS chip having a CMOS substrate and a MEMS cap housing at least a MEMS device disposed upon the CMOS substrate. The MEMS chip is flipped and oriented on a packaging substrate such that the MEMS cap is disposed above a thinner region of the packaging substrate and the CMOS substrate is bonding to the packaging substrate at a thicker region, wherein bonding regions on each of the substrates are coupled. The device is sawed to form a package-level chip scale MEMS package.
Abstract:
A hand-held processor system for processing data from an integrated MEMS (Micro-Electro-Mechanical-Systems) device disposed within a hand-held computer system and methods therefor. The Single Point Offset Correction (SPOC) process computes offset values to calibrate MEMS sensors using a single set of data measurements at an orientation without dynamic perturbation, and without requiring advance knowledge of orientation of the device. Arbitrary output biases, which are known to be dominant on a single axis, can be corrected to ensure consistent performance. The SPOC process provides a simple method to effectively calibrate a MEMS sensor without requiring extensive system resources. This process can be enhanced by additional estimations of sensor offsets using the set of data measurements or by use of rule-based empirical gain factors.
Abstract:
A portable computing device using power consumption reduction and a method of operating therefor. The method can include the following steps: determining, in a sensor in the portable computing device, orientation changes of the portable computing device; determining, in the portable computing device, a status of a first operation of the portable computing device; determining, in the portable computing device, a status of a second operation of the portable computing device; discontinuing, in the portable computing device, the second operation in response to when the orientation changes of the portable computing device are less than a threshold, and in response to the status of the first operation and the status of the second operation; and outputting, on a display of the portable computing device, an indication to a user that the second operation has been discontinued.
Abstract:
A method for fabricating a three-dimensional integrated circuit device includes providing a first substrate having a first crystal orientation, forming at least one or more PMOS devices overlying the first substrate, and forming a first dielectric layer overlying the one or more PMOS devices. The method also includes providing a second substrate having a second crystal orientation, forming at least one or more NMOS devices overlying the second substrate, and forming a second dielectric layer overlying the one or more NMOS devices. The method further includes coupling the first dielectric layer to the second dielectric layer to form a hybrid structure including the first substrate overlying the second substrate.
Abstract:
A method is provided for implementing a security mechanism in an integrated MEMS (Micro-Electro-Mechanical-System) device having a MEMS sensor with an output register associated with a sensing operation, the integrated MEMS device being electrically coupled to a computing system programmed to perform the method. The method includes, in normal operation, reading from the output register an output of the sensing operation, and in a test mode, determining, by a processor disposed within the computing system, a random value. Determining the random value can include reading from the output register, which in the test mode or provides a value from an internal pattern generator. The method also includes determining, by the processor, a validation value, reading, by the processor, the random value stored in the output register; and determining, by the processor, whether the integrated device is valid using the validation value and the random value stored in the output register.
Abstract:
A gyroscope device and method of operation therefor. The gyroscope device can include a power input, a charge pump portion coupled to the power input, a selection mechanism, a switching mechanism, an oscillator driving mechanism coupled to the switching mechanism, and an oscillator coupled to the charge pump portion and to the oscillator driving mechanism. The method of operation can include providing a first or second selection signal from a selection mechanism associated with the outputting of a DC input power or DC output power from a switching mechanism, respectively. These signals, along with an oscillator driving signal from an oscillator driving mechanism, can be used to initiate and maintain oscillation of an oscillator at a steady-state frequency within a predetermined range of frequencies.
Abstract:
A method for fabricating an integrated MEMS-CMOS device uses a micro-fabrication process that realizes moving mechanical structures (MEMS) on top of a conventional CMOS structure by bonding a mechanical structural wafer on top of the CMOS and etching the mechanical layer using plasma etching processes, such as Deep Reactive Ion Etching (DRIE). During etching of the mechanical layer, CMOS devices that are directly connected to the mechanical layer are exposed to plasma. This sometimes causes permanent damage to CMOS circuits and is termed Plasma Induced Damage (PID). Embodiments of the present invention presents methods and structures to prevent or reduce this PID and protect the underlying CMOS circuits by grounding and providing an alternate path for the CMOS circuits until the MEMS layer is completely etched.
Abstract:
A method and structure for adding mass with stress isolation to MEMS. The structure has a thickness of silicon material coupled to at least one flexible element. The thickness of silicon material can be configured to move in one or more spatial directions about the flexible element(s) according to a specific embodiment. The apparatus also includes a plurality of recessed regions formed in respective spatial regions of the thickness of silicon material. Additionally, the apparatus includes a glue material within each of the recessed regions and a plug material formed overlying each of the recessed regions.
Abstract:
A method for fabricating a multiple MEMS device includes providing a semiconductor substrate having a first and second MEMS device, and an encapsulation wafer with a first cavity and a second cavity, which includes at least one channel. The first MEMS is encapsulated within the first cavity and the second MEMS device is encapsulated within the second cavity. These devices is encapsulated within a first encapsulation environment at a first air pressure, and encapsulating the first MEMS device within the first cavity at the first air pressure. The second MEMS device within the second cavity is then subjected to a second encapsulating environment at a second air pressure via the channel of the second cavity.
Abstract:
An integrated pressure sensing device and method of fabrication thereof are disclosed. The method can include providing a substrate member having a surface region and forming a CMOS IC layer overlying the substrate and forming an oxide layer overlying the CMOS IC layer. A portion of the oxide layer can be removed to form a cavity region. A single crystalline silicon wafer can be bonded overlying the oxide surface region to seal the cavity region. The bonding process can include a fusion bonding or eutectic bonding process. The wafer can be thinned to a desired thickness and portions can be removed and filled with metal materials to form via structures. A pressure sensor device can be formed from the wafer, and can be co-fabricated with another sensor from the wafer. The pressure sensor and the other sensor can share a cavity pressure or have separate cavity pressures.