摘要:
The present invention relates to a method of manufacturing a cloverleaf microgyroscope containing an integrated post comprising: attaching a post wafer to a resonator wafer, forming a bottom post from the post wafer being attached to the resonator wafer, attaching the resonator wafer to a base wafer, wherein the bottom post fits into a post hole in the base wafer, forming a top post from the resonator wafer, wherein the bottom and top post are formed symmetrically around the same axis, and attaching a cap wafer on top of the base wafer. The present invention relates further to a gyroscope containing an integrated post with on or off-chip electronics.
摘要:
The present invention relates to a method of manufacturing a cloverleaf microgyroscope containing an integrated post comprising: attaching a post wafer to a resonator wafer, forming a bottom post from the post wafer being attached to the resonator wafer, preparing a base wafer with through-wafer interconnects, attaching the resonator wafer to the base wafer, wherein the bottom post fits into a post hole in the base wafer, forming a top post from the resonator wafer, wherein the bottom and top post are formed symmetrically around the same axis, and attaching a cap wafer on top of the base wafer.
摘要:
A first axis MEM tunneling/capacitive sensor and method of making same. Cantilever beam structures for at least two orthogonally arranged sensors and associated mating structures are defined on a first substrate or wafer, the at least two orthogonally arrange sensors having orthogonal directions of sensor sensitivity. A resonator structure of at least a third sensor is also defined, the third sensor being sensitive in a third direction orthogonal to the orthogonal directions of sensor sensitivity of the two orthogonally arranged sensors and the resonator structure having a mating structure thereon. Contact structures for at least two orthogonally arranged sensors are formed together with mating structures on a second substrate or wafer, the mating structures on the second substrate or wafer being of a complementary shape to the mating structures on the first substrate or wafer.
摘要:
A method of making a micro electromechanical switch or tunneling sensor. A cantilevered beam structure and a mating structure are defined on a first substrate or wafer; and at least one contact structure and a mating structure are defined on a second substrate or wafer, the mating structure on the second substrate or wafer being of a complementary shape to the mating structure on the first substrate or wafer. A bonding layer, preferably a eutectic bonding layer, is provided on at least one of the mating structures. The mating structure of the first substrate is moved into a confronting relationship with the mating structure of the second substrate or wafer. Pressure is applied between the two substrates so as to cause a bond to occur between the two mating structures at the bonding or eutectic layer. Then the first substrate or wafer is removed to free the cantilevered beam structure for movement relative to the second substrate or wafer.
摘要:
Various structures for cantilever beam tunneling rate gyro devices formed on a single substrate are disclosed. A cantilever electrode having a plurality of portions extending from the substrate with one end of the cantilever is suspended above the substrate at a distance from a tunneling electrode so that a tunneling current flows through the cantilever and tunneling electrode in response to an applied bias voltage. The cantilever and tunneling electrodes form a circuit that produces an output signal. A force applied to the sensor urges the cantilever electrode to deflect relative to the tunneling electrode to modulate the output signal. The output signal is a control voltage that is applied between the cantilever electrode and a control electrode to maintain a constant tunneling current. In the preferred embodiment, two cantilever portions extend from the wafer surface forming a Y-shape. In a further embodiment, a strap is fabricated on the cantilever electrode. In an alternate embodiment, a ridge emitter is formed such that it remains under the cantilever electrode during lateral motion of the cantilever. In an alternate embodiment, a cantilever having a varying width is fabricated.
摘要:
Various structures for cantilever beam tunneling rate gyro devices formed on a single substrate are disclosed. A cantilever electrode having a plurality of portions extending from the substrate with one end of the cantilever is suspended above the substrate at a distance from a tunneling electrode so that a tunneling current flows through the cantilever and tunneling electrode in response to an applied bias voltage. The cantilever and tunneling electrodes form a circuit that produces an output signal. A force applied to the sensor urges the cantilever electrode to deflect relative to the tunneling electrode to modulate the output signal. The output signal is a control voltage that is applied between the cantilever electrode and a control electrode to maintain a constant tunneling current. In the preferred embodiment, two cantilever portions extend from the wafer surface forming a Y-shape. In a further embodiment, a strap is fabricated on the cantilever electrode. In an alternate embodiment, a ridge emitter is formed such that it remains under the cantilever electrode during lateral motion of the cantilever In an alternate embodiment, a cantilever having a varying width is fabricated.
摘要:
A secondary ion mass spectrometry system and method is described which operates several orders of magnitude more quickly than previous systems, and captures information that might previously have been missed. A parallel detection approach is used which simultaneously monitors all secondary ion masses of interest, as opposed to prior serial approaches which sense only one ion mass at a time. The secondary ions are spatially separated according to mass and sensed by a detector array. An ion-electron converter and amplifier, implemented as a microchannel plate assembly, is preferably interfaced between the mass separator and detector. The detector preferably uses an array of wires to collect charge emitted by the microchannel plate. The wires are coupled to output lines by an encoding scheme which allows many fewer output lines to be employed than there are wires.
摘要:
A process for fabricating an integrated Micro-Electro-Mechanical Systems (MEMS) filter includes bonding an insulating substrate having a first end and a second end to a base substrate, the second end of the insulating substrate cantilevered over and separated from the base substrate by a gap, forming a resonator element on the second end of the insulating substrate, forming an inductive element comprising a coil, wherein the coil is formed on the insulating substrate, and forming a capacitive element on the first side of the insulating substrate, the capacitive element comprised of two conductive plates, wherein one of the two conductive plates is formed on the insulating substrate.
摘要:
In an embodiment, a piezoelectric resonator configured for parametric amplification is disclosed. The piezoelectric resonator may include or comprise a piezoelectric member, and first and second resonator electrodes associated with the piezoelectric member and positioned to enable a first electric field to be generated in a first direction. The piezoelectric resonator may also include or comprise a parametric drive electrode associated with the piezoelectric member and positioned to enable a second electric field to be generated in a second direction.
摘要:
Methods for integrating quartz-based resonators with electronics on a large area wafer through direct pick-and-place and flip-chip bonding or wafer-to-wafer bonding using handle wafers are described. The resulting combination of quartz-based resonators and large area electronics wafer solves the problem of the quartz-electronics substrate diameter mismatch and enables the integration of arrays of quartz devices of different frequencies with the same electronics.