Abstract:
A harsh environment transducer including: - a substrate (14) having a first surface and a second surface, the latter being exposed to the environment - a device layer sensor means (12) on the substrate (14) for measuring a parameter associated with the environment, including a single crystal semiconductor material having a thickness of less than about 0.5 microns - an output (50) contact on the substrate (14) and in electrical communication with the sensor means (12) - a package having an internal space communicating with the environment and receiving the substrate (14) such that its first surface is substantially isolated from the environment and its second surface is substantially exposed to the environment - a connecting component (22) coupled to the package - a wire (24) electrically connecting the connecting component (22) and the output contact (50) such that an output of the sensor means can be communicated. The external surface of the wire (24) and at least one of the output contact (50) and the connecting component (22) is substantially platinum.
Abstract:
A pressure sensor (10) for use in a harsh environment including a substrate (14) and a sensor die (12) directly coupled to the substrate (14) by a bond frame (70) positioned between the substrate (14) and the sensor die (12). The sensor die (12) includes a generally flexible diaphragm (16) configured to flex when exposed to a sufficient differential pressure thereacross. The sensor (10) further includes a piezoelectric or piezoresistive sensing element (46) at least partially located on the diaphragm (16) such that the sensing element (46) provides an electrical signal upon flexure of the diaphragm (16). The sensor (10) also includes an connecting component (22) electrically coupled to the sensing element (46) at a connection location that is fluidly isolated from the diaphragm (16) by the bond frame (70). The bond frame (70) is made of materials and the connecting component (22) is electrically coupled to the sensing element (46) by the same materials of the bond frame (70).
Abstract:
A micro mirror structure including a plurality of individually movable mirrors. Each mirror has a generally concave shape from a top perspective at a temperature of about 20 degrees Celsius and has a generally convex shape from a top perspective at a temperature of about 85 degrees Celsius. In one embodiment, the radius of curvature may be greater than about 500 mm at a temperature of about 20 degrees Celsius and may be less than about -600 mm at a temperature of about 85 degrees Celsius at a thickness of about 10 microns. In another embodiment, the invention is a micro mirror structure including a plurality of individually movable mirrors arranged in an array. Each mirror includes a substrate, a diffusion barrier layer located above the substrate, and a reflective layer located above the diffusion barrier layer. The diffusion barrier layer generally limits the diffusion of the top reflective layer through the diffusion barrier layer.
Abstract:
A detector including a base having a recess formed therein and a diaphragm generally extending across the recess. The detector further includes an infrared sensitive component or a piezoelectric or piezoresistive element located on, above or supported by the diaphragm. The diaphragm includes a material which is generally resistant to liquid chemical etchants and which has a thermal conductivity of less than about 0.005 Wcm -1 K -1 .
Abstract translation:一种检测器,包括具有形成在其中的凹部的基部和通常延伸穿过凹部的隔膜。 检测器还包括位于隔膜上方或由隔膜支撑的红外敏感元件或压电或压阻元件。 隔膜包括通常耐液体化学蚀刻剂并具有小于约0.005Wcm -1 K -1的热导率的材料。
Abstract:
A method of preparing a semiconductor structure comprises: (a) providing a first material comprising (i) a first wafer comprising silicon, (ii) at least one SiC conversion layer obtained by converting a portion of the silicon to SiC, (iii) at least one layer of non-indigenous SiC applied to the conversion layer, and (iv) at least one oxide layer applied to the non-indigenous SiC layer; (b) implanting ions in a region of the non-indigenous SiC layer, thereby establishing an implant region therein which defines a first portion of the non-indigenous SiC layer and a second portion of the non-indigenous SiC layer; (c) providing at least one additional material comprising (i) a second wafer comprising silicon, and (ii) an oxide layer applied to a face of the second wafer; (d) bonding the oxide layer of the first material and oxide layer of the material to provide an assembly of the first material and second material; and (e) separating at the implant region the second portion of the non-indigenous SiC layer from the first portion of the non-indigenous SiC layer to provide. The resultant semiconductor structure comprises a base wafer which may be a Si wafer, an insulating oxide layer which may be SiO 2 adjacent to the base wafer, and an active top layer of non-indigenous SiC. The semiconductor structure may be used to fabricate integrated electronics, pressure sensors, temperature sensors or other instrumentation which may be used in high temperature environments such as aircraft engines.
Abstract:
A method of preparing a semiconductor structure comprises: (a) providing a first material comprising (i) a first wafer comprising silicon, (ii) at least one SiC conversion layer obtained by converting a portion of the silicon to SiC, (iii) at least one layer of non-indigenous SiC applied to the conversion layer, and (iv) at least one oxide layer applied to the non-indigenous SiC layer; (b) implanting ions in a region of the non-indigenous SiC layer, thereby establishing an implant region therein which defines a first portion of the non-indigenous SiC layer and a second portion of the non-indigenous SiC layer; (c) providing at least one additional material comprising (i) a second wafer comprising silicon, and (ii) an oxide layer applied to a face of the second wafer; (d) bonding the oxide layer of the first material and oxide layer of the material to provide an assembly of the first material and second material; and (e) separating at the implant region the second portion of the non-indigenous SiC layer from the first portion of the non-indigenous SiC layer to provide. The resultant semiconductor structure comprises a base wafer which may be a Si wafer, an insulating oxide layer which may be SiO2 adjacent to the base wafer, and an active top layer of non-indigenous SiC. The semiconductor structure may be used to fabricate integrated electronics, pressure sensors, temperature sensors or other instrumentation which may be used in high temperature environments such as aircraft engines.
Abstract:
A pressure sensor (10) for use in a harsh environment including a substrate (14) and a sensor die (12) directly coupled to the substrate (14) by a bond frame (70) positioned between the substrate (14) and the sensor die (12). The sensor die (12) includes a generally flexible diaphragm (16) configured to flex when exposed to a sufficient differential pressure thereacross. The sensor (10) further includes a piezoelectric or piezoresistive sensing element (46) at least partially located on the diaphragm (16) such that the sensing element (46) provides an electrical signal upon flexure of the diaphragm (16). The sensor (10) also includes an connecting component (22) electrically coupled to the sensing element (46) at a connection location that is fluidly isolated from the diaphragm (16) by the bond frame (70). The bond frame (70) is made of materials and the connecting component (22) is electrically coupled to the sensing element (46) by the same materials of the bond frame (70).
Abstract:
A harsh environment transducer including: - a substrate (14) having a first surface and a second surface, the latter being exposed to the environment - a device layer sensor means (12) on the substrate (14) for measuring a parameter associated with the environment, including a single crystal semiconductor material having a thickness of less than about 0.5 microns - an output (50) contact on the substrate (14) and in electrical communication with the sensor means (12) - a package having an internal space communicating with the environment and receiving the substrate (14) such that its first surface is substantially isolated from the environment and its second surface is substantially exposed to the environment - a connecting component (22) coupled to the package - a wire (24) electrically connecting the connecting component (22) and the output contact (50) such that an output of the sensor means can be communicated. The external surface of the wire (24) and at least one of the output contact (50) and the connecting component (22) is substantially platinum.