摘要:
One embodiment of the present invention sets forth a substrate contact for a MEMS device die, where the substrate contact is formed through an electrically insulative layer in the device die that is positioned between a handle wafer layer and a MEMS device layer formed on the handle wafer layer. The substrate contact serves as a path to ground for the MEMS handle wafer layer and is formed during the fabrication process of the MEMS device. One advantage of the disclosed invention is that a robust, low-impedance path to ground is provided for the MEMS handle wafer layer, with minimal impact on the process of fabricating a MEMS device.
摘要:
One embodiment of the present invention sets forth a substrate contact for a MEMS device die, where the substrate contact is formed through an electrically insulative layer in the device die that is positioned between a handle wafer layer and a MEMS device layer formed on the handle wafer layer. The substrate contact serves as a path to ground for the MEMS handle wafer layer and is formed during the fabrication process of the MEMS device. One advantage of the disclosed invention is that a robust, low-impedance path to ground is provided for the MEMS handle wafer layer, with minimal impact on the process of fabricating a MEMS device.
摘要:
One embodiment of the present invention sets forth a substrate contact for a MEMS device die, where the substrate contact is formed through an electrically insulative layer in the device die that is positioned between a handle wafer layer and a MEMS device layer formed on the handle wafer layer. The substrate contact serves as a path to ground for the MEMS handle wafer layer and is formed during the fabrication process of the MEMS device. One advantage of the disclosed invention is that a robust, low-impedance path to ground is provided for the MEMS handle wafer layer, with minimal impact on the process of fabricating a MEMS device.
摘要:
One embodiment of the present invention sets forth a substrate contact for a MEMS device die, where the substrate contact is formed through an electrically insulative layer in the device die that is positioned between a handle wafer layer and a MEMS device layer formed on the handle wafer layer. The substrate contact serves as a path to ground for the MEMS handle wafer layer and is formed during the fabrication process of the MEMS device. One advantage of the disclosed invention is that a robust, low-impedance path to ground is provided for the MEMS handle wafer layer, with minimal impact on the process of fabricating a MEMS device.
摘要:
One embodiment of the present inventions sets forth a method for decreasing a temperature coefficient of frequency (TCF) of a MEMS resonator. The method comprises lithographically defining slots in the MEMS resonator beams and filling the slots with a compensating material (for example, an oxide) wherein the temperature coefficient of Young's Modulus (TCE) of the compensating material has a sign opposite to a TCE of the material of the resonating element.
摘要:
One embodiment of the present inventions sets forth a method for decreasing a temperature coefficient of frequency (TCF) of a MEMS resonator. The method comprises lithographically defining slots in the MEMS resonator beams and filling the slots with a compensating material (for example, an oxide) wherein the temperature coefficient of Young's Modulus (TCE) of the compensating material has a sign opposite to a TCE of the material of the resonating element.
摘要:
One embodiment of the present invention sets forth a method for decreasing a temperature coefficient of frequency (TCF) of a MEMS resonator. The method comprises lithographically defining slots in the MEMS resonator beams and filling the slots with oxide. By growing oxide within the slots, the amount of oxide growth on the outside surfaces of the MEMS resonator may be reduced. Furthermore, by situating the slots in the areas of large flexural stresses, the contribution of the embedded oxide to the overall TCF of the MEMS resonator is increased, and the total amount of oxide needed to decrease the overall TCF of the MEMS resonator to a particular target value is reduced. As a result, the TCF of the MEMS resonator may be reduced in a manner that is more effective relative to prior art approaches.
摘要:
One embodiment of the present invention sets forth a method for decreasing a temperature coefficient of frequency (TCF) of a MEMS resonator. The method comprises lithographically defining slots in the MEMS resonator beams and filling the slots with oxide. By growing oxide within the slots, the amount of oxide growth on the outside surfaces of the MEMS resonator may be reduced. Furthermore, by situating the slots in the areas of large flexural stresses, the contribution of the embedded oxide to the overall TCF of the MEMS resonator is increased, and the total amount of oxide needed to decrease the overall TCF of the MEMS resonator to a particular target value is reduced. As a result, the TCF of the MEMS resonator may be reduced in a manner that is more effective relative to prior art approaches.
摘要:
One embodiment of the present invention sets forth a method for decreasing a temperature coefficient of frequency (TCF) of a MEMS resonator. The method comprises lithographically defining slots in the MEMS resonator beams and filling the slots with oxide. By growing oxide within the slots, the amount of oxide growth on the outside surfaces of the MEMS resonator may be reduced. Furthermore, by situating the slots in the areas of large flexural stresses, the contribution of the embedded oxide to the overall TCF of the MEMS resonator is increased, and the total amount of oxide needed to decrease the overall TCF of the MEMS resonator to a particular target value is reduced. As a result, the TCF of the MEMS resonator may be reduced in a manner that is more effective relative to prior art approaches.
摘要:
An optical mirror system with multi-axis rotational control is disclosed. The mirror system includes an optical surface assembly, and at least one leg assembly coupled to the optical surface assembly. The at least one leg assembly supports the optical surface above a substrate. A system and method in accordance with the present invention can operate with many different actuator mechanisms, including but not limited to, electrostatic, thermal, piezoelectric, and magnetic. An optical mirror system in accordance with the present invention accommodates large mirrors and rotation angles. Scanning mirrors can be made with this technique using standard surface-micromachining processes, or a deep RIE etch process. A device in accordance with the present invention meets the requirements for a directly scalable, high port count optical switch, utilizing a two mirror per optical I/O port configuration. An optical mirror in accordance with the present invention can be utilized in, but is not limited to, the following applications: optical add-drop multiplexers, wavelength routers, free-space optical interconnects, chip-level optical I/O, optical scanning displays, optical scanner (bar-codes, micro cameras), optical storage read/write heads, laser printers, medical replacement for glasses (incorporated with adaptive optics), medical diagnostic equipment, optical scanning for security applications.