摘要:
Mechanical low pass filters for motion sensors and methods for making same are disclosed. In some implementations, a motion sensor package comprises: a substrate; one or more mechanically compliant dampers formed on the substrate; one or more mechanically compliant metal springs formed on the one or more dampers and the substrate; and a sensor stack attached to the one or more metal springs, wherein the one or more metal springs and dampers provide a mechanical suspension system having a resonant frequency that is higher than a sensing bandwidth of a motion sensor in the sensor stack and lower than a resonant frequency of the motion sensor.
摘要:
Mechanical low pass filters for motion sensors and methods for making the same are disclosed. In an implementation, a motion sensor package comprises: a substrate; one or more viscous dampers formed on the substrate; one or more mechanically compliant metal springs formed on the substrate; and a sensor stack attached to the one or more metal springs, the sensor stack overlying the one or more viscous dampers and forming a gap between the sensor stack and the one or more viscous dampers and channels between the one or more viscous dampers and metal springs, wherein the one or more metal springs and the one or more viscous dampers provide a mechanical suspension system having a resonant frequency that is higher than a sensing bandwidth of a motion sensor in the sensor stack and lower than a resonant frequency of the motion sensor.
摘要:
An electronic device may include components that are formed using microelectromechanical systems (MEMS) technology. A MEMS device may include a MEMS structure bonded to a semiconductor substrate. The MEMS structure may be formed from a silicon substrate having a cavity and a moveable member suspended over the cavity and free to oscillate within the cavity. The semiconductor substrate may be a complementary metal-oxide semiconductor substrate having circuitry such as sensing electrodes. The sensing electrodes may be used to gather signals that are produced by movement of the suspended member. One or more of the electrodes on the semiconductor substrate may be covered by a dielectric film to prevent electrical shorts between adjacent electrodes on the semiconductor substrate.
摘要:
Mechanical low pass filters for motion sensors and methods for making the same are disclosed. In an implementation, a motion sensor package comprises: a substrate; one or more viscous dampers formed on the substrate; one or more mechanically compliant metal springs formed on the substrate; and a sensor stack attached to the one or more metal springs, the sensor stack overlying the one or more viscous dampers and forming a gap between the sensor stack and the one or more viscous dampers and channels between the one or more viscous dampers and metal springs, wherein the one or more metal springs and the one or more viscous dampers provide a mechanical suspension system having a resonant frequency that is higher than a sensing bandwidth of a motion sensor in the sensor stack and lower than a resonant frequency of the motion sensor.
摘要:
Mechanical low pass filters for motion sensors and methods for making same are disclosed. In some implementations, a motion sensor package comprises: a substrate; one or more mechanically compliant dampers formed on the substrate; one or more mechanically compliant metal springs formed on the one or more dampers and the substrate; and a sensor stack attached to the one or more metal springs, wherein the one or more metal springs and dampers provide a mechanical suspension system having a resonant frequency that is higher than a sensing bandwidth of a motion sensor in the sensor stack and lower than a resonant frequency of the motion sensor.
摘要:
An electronic device may include components that are formed using microelectromechanical systems (MEMS) technology. A MEMS device may include a MEMS structure bonded to a semiconductor substrate. The MEMS structure may be formed from a silicon substrate having a cavity and a moveable member suspended over the cavity and free to oscillate within the cavity. The semiconductor substrate may be a complementary metal-oxide semiconductor substrate having circuitry such as sensing electrodes. The sensing electrodes may be used to gather signals that are produced by movement of the suspended member. One or more of the electrodes on the semiconductor substrate may be covered by a dielectric film to prevent electrical shorts between adjacent electrodes on the semiconductor substrate.
摘要:
A strain measurement platform that comprises of a strain die that can be embedded inside a package substrate or have its own substrate with through silicon vias (TSVs) is disclosed. The strain die comprises a body and a base. The base is coupled to the body with strain enhancing structures. Strain enhancing structures are formed on the strain die to amplify the strain signals locally, while also acting as strain and vibration isolators. Strain sensors are formed on or around the strain enhancing structures at locations of maximum strain. The strain sensors can be piezo-resistors, piezo-junctions or piezo-electrics. Strain enhancing structures are implemented either as compliant springs or as a thin membrane over which the base is suspended. A package stack can be mounted on top of the strain die and electrically connected to a strain measuring platform. Some example process flows for fabricating strain die are also disclosed.
摘要:
A user may provide input to a handheld electronic device by making gestures with the handheld electronic device. The input gestures may be used to generate remote control signals for external equipment. The electronic device may include circuitry for detecting a user's movement of the handheld electronic device. The circuitry may include an accelerometer operable in normal and low power modes and a processor operable in sleep and wake modes. Motion data gathered in low power mode may be stored in a dedicated low power mode data storage structure. Motion analysis circuitry may detect a user's movement of the electronic device based on a standard deviation of the motion data. Upon detecting a user's movement of the handheld electronic device, the processor may be woken up to analyze the motion data stored in the low power mode data storage structure and to confirm the user's movement of the electronic device.