Abstract:
A method for fabricating a thermally isolated microelectromechanical system (MEMS) structure is provided. The method includes processing a first wafer of a first material with a glass wafer to form a composite substrate including at least one sacrificial structure of the first material and glass; forming a MEMS device in a second material; forming at least one temperature sensing element on at least one of: the composite substrate; and the MEMS device; and etching away the at least one sacrificial structure of the first material in the composite substrate to form at least one thermally isolating glass flexure. The MEMS device is thermally isolated on a thermal isolation stage by the at least one thermally isolating glass flexure. The at least one temperature sensing element in on a respective at least one of: the thermal isolation stage; and the MEMS device.
Abstract:
A micro-electro mechanical apparatus having a PN-junction is provided. The micro-electro mechanical apparatus includes a movable mass, a conductive layer, and an electrode. The movable mass includes a P-type semiconductor layer and an N-type semiconductor layer. The PN-junction is formed between the P-type semiconductor layer and the N-type semiconductor layer. The micro-electro mechanical apparatus is capable of eliminating abnormal voltage signal when an alternating current passes through the conductive layer. The micro-electro mechanical apparatus is adapted to measure acceleration and magnetic field. The micro-electro mechanical apparatus can be other types of micro-electro mechanical apparatus such as micro-electro mechanical scanning micro-mirror.
Abstract:
A micro-electro mechanical apparatus having a PN-junction is provided. The micro-electro mechanical apparatus includes a movable mass, a conductive layer, and an electrode. The movable mass includes a P-type semiconductor layer and an N-type semiconductor layer. The PN-junction is formed between the P-type semiconductor layer and the N-type semiconductor layer. The micro-electro mechanical apparatus is capable of eliminating abnormal voltage signal when an alternating current passes through the conductive layer. The micro-electro mechanical apparatus is adapted to measure acceleration and magnetic field. The micro-electro mechanical apparatus can be other types of micro-electro mechanical apparatus such as micro-electro mechanical scanning micro-mirror.
Abstract:
A wearable device is provided having multiple sensors configured to detect and measure different parameters of interest. The wearable device includes at least one monolithic integrated multi-sensor (MIMS) device. The MIMS device comprises at least two sensors of different types formed on a common semiconductor substrate. For example, the MIMS device can comprise an indirect sensor and a direct sensor. The wearable device couples a first parameter to be measured directly to the direct sensor. Conversely, the wearable device can couple a second parameter to be measured to the indirect sensor indirectly. Other sensors can be added to the wearable device by stacking a sensor to the MIMS device or to another substrate coupled to the MIMS device. This supports integrating multiple sensors to reduce form factor, cost, complexity, simplify assembly, while increasing performance.
Abstract:
The invention relates to a sensor with at least one silicon-based micromechanical structure, which is integrated with a sensor chamber of a foundation wafer, and with at least one covering that covers the foundation wafer in the region of the sensor chamber, and to a method for producing a sensor. It is provided that in the sensor of the invention, the covering (13) comprises a first layer (32) (deposition layer) that is permeable to an etching medium and the reaction products, and a hermetically sealing second layer (34) (sealing layer) located above it, and that in the method of the invention, at least the sensor chamber (28) present in the foundation wafer (11) after the establishment of the structure (26) is filled with an oxide (30), in particular CVD oxide or porous oxide; the sensor chamber (28) is covered by a first layer (32) (deposition layer), in particular of polysilicon, that is transparent to an etching medium and the reaction products or is retroactively made transparent; the oxide (30) in the sensor chamber (28) is removed through the deposition layer (32) with the etching medium; and next, a second layer (34) (sealing layer), in particular of metal or an insulator, is applied to the deposition layer (32) and hermetically seals off the sensor chamber (28).
Abstract:
Methods for making thin silicon layers suspended over recesses in glass wafers. One method includes providing a thin silicon-on-insulator (SOI) wafer, and a glass wafer. The SOI wafer can include a silicon oxide layer disposed between a first undoped or substantially undoped silicon layer and a second silicon layer. Recesses can be formed in the glass wafer surface and electrodes may be formed on the glass wafer surface. The first silicon layer of the SOI wafer is then bonded to the glass wafer surface having the recesses, and the second silicon layer is subsequently removed using the silicon oxide layer as an etch stop. Next, the silicon oxide layer is removed. The first silicon layer can then be etched to form the desired structure. In another illustrative embodiment, the first silicon layer has a patterned metal layer thereon. The SOI wafer is bonded to the glass wafer, with the patterned metal layer positioned adjacent the recesses in the glass wafer. Then, the second silicon layer is removed using the silicon oxide layer as an etch stop, and the silicon oxide layer is subsequently removed. The first silicon layer is then etched using the patterned metal layer as an etch stop. The patterned metal layer is then removed.
Abstract:
Methods for making thin silicon layers suspended over recesses in glass wafers. One method includes providing a thin silicon-on-insulator (SOI) wafer, and a glass wafer. The SOI wafer can include a silicon oxide layer disposed between a first undoped or substantially undoped silicon layer and a second silicon layer. Recesses can be formed in the glass wafer surface and electrodes may be formed on the glass wafer surface. The first silicon layer of the SOI wafer is then bonded to the glass wafer surface having the recesses, and the second silicon layer is subsequently removed using the silicon oxide layer as an etch stop. Next, the silicon oxide layer is removed. The first silicon layer can then be etched to form the desired structure. In another illustrative embodiment, the first silicon layer has a patterned metal layer thereon. The SOI wafer is bonded to the glass wafer, with the patterned metal layer positioned adjacent the recesses in the glass wafer. Then, the second silicon layer is removed using the silicon oxide layer as an etch stop, and the silicon oxide layer is subsequently removed. The first silicon layer is then etched using the patterned metal layer as an etch stop. The patterned metal layer is then removed.
Abstract:
PURPOSE: An inertia sensor package having a protective cap with plate electrodes and a method for manufacturing the same are provided to remarkably reduce an area of an MEMS device as an inertia sensor is electrically connected to a driving chip by a pad formed on the upper part of the protective cap. CONSTITUTION: A method for manufacturing an inertia sensor package is as follows. An MEMS(Microelectromechanical System) device including a first plate electrode formed on a semiconductor is formed(S10). A protective cap including a second plate electrode is formed(S20). The protective cap is attached to the MEMS device so that the first and second plate electrodes are faced to each other(S30). [Reference numerals] (AA) Start; (BB) End; (S10) Forming a MEMS device including a movable plate electrode of an inertia sensor; (S20) Forming a protective cap provided with a fixed plate electrode of the inertia sensor by filling a via hole with an insulating material; (S30) Attaching the protective cap to the top of the MEMS device so that the fixed and movable plate electrodes are faced to each other
Abstract:
PURPOSE: An integrated 6-axis sensor for motion capturing and a manufacturing method thereof are provided to remarkably reduce the size of the 6-axis sensor by directly installing a magnetic sensor in a protective cap. CONSTITUTION: An integrated 6-axis sensor for motion capturing comprises a dynamic sensor(201), a protective cap(200), and magnetic sensors(203a,203b,203c). The dynamic sensor is coupled to a circuit board(202). The protective cap is installed on the top of the dynamic sensor and protects the dynamic sensor. The magnetic sensors are installed on the top of the protective cap and are electrically connected to the circuit board through a wire.