WO2005019790A1 - センサ装置 - Google Patents
センサ装置 Download PDFInfo
- Publication number
- WO2005019790A1 WO2005019790A1 PCT/JP2004/012270 JP2004012270W WO2005019790A1 WO 2005019790 A1 WO2005019790 A1 WO 2005019790A1 JP 2004012270 W JP2004012270 W JP 2004012270W WO 2005019790 A1 WO2005019790 A1 WO 2005019790A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sensor
- sensor device
- lead
- physical quantity
- pressure
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/14—Housings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0061—Electrical connection means
- G01L19/0084—Electrical connection means to the outside of the housing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0092—Pressure sensor associated with other sensors, e.g. for measuring acceleration or temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/14—Housings
- G01L19/141—Monolithic housings, e.g. molded or one-piece housings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/14—Housings
- G01L19/148—Details about the circuit board integration, e.g. integrated with the diaphragm surface or encapsulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
- G01P1/02—Housings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
- G01P1/02—Housings
- G01P1/023—Housings for acceleration measuring devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
- H01L2224/48247—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/49—Structure, shape, material or disposition of the wire connectors after the connecting process of a plurality of wire connectors
- H01L2224/491—Disposition
- H01L2224/4912—Layout
- H01L2224/49171—Fan-out arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
- H01L2224/732—Location after the connecting process
- H01L2224/73251—Location after the connecting process on different surfaces
- H01L2224/73265—Layer and wire connectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
- H01L2924/1815—Shape
Definitions
- the present invention relates to a sensor device for measuring a plurality of physical quantities.
- Patent Document 1 discloses a composite sensor device in which a pressure sensor for sensing pressure and a temperature sensor for sensing temperature are incorporated in one package.
- Patent Document 1 Japanese Patent No. 3149957 (FIG. 2)
- the present invention has been made to solve the above-mentioned conventional problems, and can reduce a space (area) required for mounting a plurality of sensors for measuring a physical quantity. Another object is to provide a sensor device that can reduce the power required to drive these sensors.
- a sensor device which has been made to solve the above problem, includes a lead, a plurality of physical quantity sensors, a signal processing circuit, and a molded body.
- Lead terminals forming input / output terminals are formed at the tips of the leads.
- Each physical quantity sensor is arranged on a lead, and measures a physical quantity.
- the signal processing circuit is disposed on the lead and processes a signal from the physical quantity sensor.
- the molded body is made of a plastic material, and seals the leads, the physical quantity sensor, and the signal processing circuit so that the lead terminals protrude outside.
- the signal processing circuit controls on / off operations of other physical quantity sensors based on signals of at least one physical quantity sensor among the plurality of physical quantity sensors.
- the space (area) required for installing the physical quantity sensor can be reduced as compared with a case where a plurality of physical quantity sensors are individually mounted.
- the on / off operation of another physical quantity sensor is controlled by the signal of one physical quantity sensor, there is no need to constantly drive a plurality of physical quantity sensors, and power can be saved. Therefore, when a battery is mounted on the sensor device, it is possible to reduce the size of the battery without having to use a large and large-capacity battery.
- the plurality of physical quantity sensors include a pressure sensor and an acceleration sensor.
- a through hole that opens to the outside is formed in a portion of the mold body above the pressure receiving portion of the pressure sensor.
- the through-hole forms a pressure introduction passage communicating with the pressure receiving portion.
- the plurality of physical quantity sensors may be configured by an acceleration sensor and a rotational angular velocity sensor.
- the pressure sensor, the acceleration sensor, and the signal processing circuit are arranged in a line in the sensor device longitudinal direction. Preferably, they are arranged. In this case, it is preferable that the pressure sensor and the acceleration sensor are arranged at positions symmetrical to each other with respect to the center of the signal processing circuit in the vertical direction of the sensor device.
- the height dimension of the pressure sensor and the height dimension of the acceleration sensor are substantially the same. In this case, the thickness of the molded body is substantially the same between the lower side of the pressure sensor and the lower side of the acceleration sensor, and the stress is balanced between one end and the other end in the longitudinal direction of the sensor device.
- this pressure 'acceleration sensor it is preferable that a flexible resin is interposed between the acceleration sensor and the mold body. With this configuration, the deformation of the acceleration sensor is reduced by the resin, so that the measurement accuracy of the sensor device is improved.
- the pressure introduction path may be composed of a plurality of small-diameter paths. By doing so, it is possible to prevent foreign substances such as dust and dust from entering the pressure sensor. Further, even if an excessive pressure is applied, the impact due to the pressure can be reduced, and the pressure sensor can be prevented from being broken.
- a cylindrical portion having an inner diameter substantially equal to the diameter of the through hole may be formed integrally with the mold body.
- the height dimensions of the plurality of physical quantity sensors may be substantially the same.
- the thickness dimension of the mold body between the physical quantity sensor and the sensor-side mold body surface and the thickness dimension of the mold body between the lead and the lead-side mold body surface are substantially the same.
- the thermal stress caused by the difference in the linear expansion coefficient between the physical quantity sensor and the molded body made of a plastic material can be reduced, and the temperature dependency can be reduced.
- both parts of the molded body are covered so that the volume of the part covering the upper surface side of the lead is substantially the same as the volume of the part covering the lower surface side of the lead of the molded body.
- the portions may be formed in different tapered shapes. In this case, the thermal stress caused by the difference in the linear expansion coefficient between the lead and the molded body made of the plastic material can be reduced, and the temperature dependency can be reduced.
- At least one of the plurality of physical quantity sensors and the signal processing circuit may be disposed on the upper and lower surfaces of the lead so as to sandwich the lead. .
- the size of the sensor device can be reduced.
- a lead formed of a metal such as an iron-nickel alloy forms a signal processing circuit with a physical quantity sensor. Since it is sandwiched between ICs, it is possible to suppress the noise generated by the signal processing circuit from affecting the physical quantity sensor due to the leads.
- FIG. 1 is a plan view of a sensor device according to Embodiment 1 of the present invention.
- FIG. 2 is a cross-sectional view of the sensor device shown in FIG. 1, taken along line AA.
- FIG. 3 is a partial cross-sectional view of the sensor device shown in FIG. 1, taken along line BB.
- FIG. 4 is a bottom view of the sensor device shown in FIG. 1.
- FIG. 5 is a bottom view of the sensor device shown in FIG. 1 in a state where a lower mold body has been removed, and shows internal wiring of the sensor device.
- FIG. 6 is a plan view of a sensor device according to Embodiment 2 of the present invention.
- FIG. 7 is a sectional view of the sensor device shown in FIG. 6.
- FIG. 8 is a bottom view of the sensor device shown in FIG. 6, with a molded body removed, showing internal wiring of the sensor device.
- FIG. 9 is a longitudinal sectional view of a sensor device according to Embodiment 3 of the present invention.
- FIG. 10 is a cross-sectional view of a sensor device according to Embodiment 4 of the present invention.
- FIG. 11 is a plan view of a sensor device according to Embodiment 5 of the present invention.
- FIG. 12 is a longitudinal sectional view of the sensor device shown in FIG.
- FIG. 13 is a plan view of a sensor device according to Embodiment 6 of the present invention.
- FIG. 14 is a longitudinal sectional view of the sensor device shown in FIG.
- FIG. 15 is a longitudinal sectional view of a sensor device according to Embodiment 7 of the present invention.
- FIG. 16 is a longitudinal sectional view of a sensor device according to Embodiment 8 of the present invention.
- the sensor device which can be used, for example, as a tire pressure sensor, includes a pressure sensor 1, an acceleration sensor 2, a signal processing circuit (signal processing circuit). (Processing IC) 3.
- the signal processing circuit 3 activates the pressure sensor 1 only when the acceleration sensor 2 detects acceleration.
- the pressure sensor 1, the acceleration sensor 2, and the signal processing circuit 3 are provided on the lower surface of the lead 4.
- the signal processing circuit 3 is bonded to the pressure sensor 1 and the acceleration sensor 2 with a plurality of wires 5, respectively, and is electrically connected.
- a portion of the lead 4 where the pressure sensor 1 is provided is provided with a pressure receiving portion provided in the pressure sensor 1.
- the pressure receiving unit 6 is formed of, for example, a diaphragm and senses pressure.
- the leads 4 are covered and sealed with a mold body 8 made of a plastic material so that the plurality of lead terminals 4a project outside.
- the molded body 8 includes an upper molded body 8a on the upper surface side of the lead 4 and a lower molded body 8b on the lower surface side of the lead 4.
- the upper mold body 8a has a through hole 7b for exposing the opening 7a to the outside.
- the opening 7a and the through hole 7b communicate with each other to form a pressure introduction path 7 for transmitting external pressure to the pressure receiving section 6.
- a flexible silicone resin 15 is disposed between the lower surface of the acceleration sensor 2 and the lower mold body 8b. The silicone resin 15 reduces the deformation of the acceleration sensor 2 caused by the pressure.
- the lead 4 is formed by cutting off a part of a lead frame made of a metal such as an iron-nickel alloy.
- the lead 4 has a rectangular pressure sensor arrangement part 9 where the pressure sensor 1 is arranged, a rectangular acceleration sensor arrangement part 10 where the acceleration sensor 2 is arranged, and a rectangular shape where the signal processing circuit 3 is arranged. It has a signal processing circuit arrangement section 11 and a lead terminal 4a.
- Pressure sensor placement section 9 and signal processing circuit placement section 1 1 and the acceleration sensor disposition portion 10 are integrally formed so as to be arranged in a single row in the vertical direction of the sensor device (the horizontal direction in FIGS. 4 and 5).
- Each of the pressure sensor disposition portion 9 and the acceleration sensor disposition portion 10 is formed with a plurality of lead terminals 4a protruding outward as viewed in the sensor device longitudinal direction (longitudinal direction). Further, the sensor device is provided with a plurality of leads 4 ′ which are wire-bonded to the signal processing circuit 3 with wires 5 and are separate from the leads 4. Each lead 4 'has a lead terminal 4a. These lead terminals 4a protrude from the mold body 8 in the horizontal direction of the sensor device (the direction orthogonal to the vertical direction of the sensor device) in parallel.
- the pressure sensor disposition unit 9, the signal processing circuit disposition unit 11, and the acceleration sensor disposition unit 10 are disposed in a line in the sensor device longitudinal direction.
- the pressure sensor 9 and the acceleration sensor 10 are arranged at positions substantially symmetric with respect to the center of the signal processing circuit arrangement section 11 in the positional relationship in the sensor device longitudinal direction.
- the bottom surfaces of both sensors 9 and 10 are also at substantially the same height. Therefore, the thickness of the lower mold body 8b is substantially equal between the lower side of the pressure sensor 9 and the lower side of the acceleration sensor 10. Therefore, the stress is balanced between the one end and the other end in the vertical direction of the sensor device.
- pressure sensor 1 and acceleration sensor 2 are integrally provided on lead 4 and sealed with molded body 8, pressure sensor 1 and acceleration sensor 2
- the space (area) on the mounting board required for installation can be reduced as compared with the case where and are individually installed on the mounting board.
- the signal processing circuit 3 controls the ON / OFF operation of the pressure sensor 1 based on the signal of the acceleration sensor 2, power can be saved. Therefore, when a battery is mounted on the sensor device, the size of the battery can be reduced. Further, the deformation of the acceleration sensor 2 is alleviated by the silicone resin 15 and the stress is balanced between one end and the other end in the longitudinal direction of the sensor device, so that the measurement accuracy of the sensor device is greatly improved.
- Embodiment 2 of the present invention will be specifically described with reference to FIGS.
- the sensor device activates pressure sensor 1, acceleration sensor 2, and pressure sensor 1 only when acceleration sensor 2 detects acceleration.
- a signal processing circuit (signal processing IC) 3 having the function of performing The pressure sensor 1, the acceleration sensor 2, and the signal processing circuit 3 are provided on the lower surface of the lead 4.
- the signal processing circuit 3 is wire-bonded to the pressure sensor 1 and the acceleration sensor 2 by wires 5 at two places each, and is electrically connected.
- One opening 7 a for transmitting external pressure to the pressure receiving portion 6 provided in the pressure sensor 1 is provided in a portion of the lead 4 where the pressure sensor 1 is provided.
- the pressure receiving section 6 is formed of, for example, a diaphragm and senses pressure.
- the leads 4 are covered and sealed by a mold body 8 made of a plastic material so that the plurality of lead terminals 4a protrude to the outside.
- the MONORED body 8 includes an upper molded body 8a on the upper surface side of the lead 4 and a lower molded body 8b on the lower surface side of the lead 4.
- the upper monolide body 8a has a through hole 7b for exposing the opening 7a to the outside.
- the opening 7a and the through-hole 7b communicate with each other to form a pressure introduction path 7, and the pressure introduction path 7 is formed. External pressure is transmitted to the pressure receiving section 6 via the pressure introduction path 7.
- FIG. 8 shows the sensor device in a state before the leads 4 are sealed with the mold body 8.
- a region where the mold body 8 is formed is indicated by a broken line L.
- the lead 4 is formed by cutting a lead frame made of a metal such as an iron-nickel alloy.
- the lead 4 has a rectangular pressure sensor arrangement section 9 in which the pressure sensor 1 is arranged, a rectangular acceleration sensor arrangement section 10 in which the acceleration sensor 2 is arranged, and a rectangular signal in which the signal processing circuit 3 is arranged. It has a processing circuit arrangement section 11 and lead terminals 4a.
- the lead 4 is formed by connecting one of two diagonally opposite corners of the signal processing circuit arrangement section 11 to the corner of the pressure sensor arrangement section 9 and connecting the other corner to the acceleration sensor arrangement section. They are integrally formed so as to connect with the ten corners.
- the lead terminals 4a are integrally formed on the outer sides of the pressure sensor disposition portion 9 and the acceleration sensor disposition portion 10 so as to protrude outward.
- a plurality of leads 4 ′ are provided separately from the leads 4, and these leads 4 ′ are wire-bonded to the signal processing circuit 3 by wires 5.
- Each lead 4 'is connected to the signal processing circuit 3 Are arranged so as to radially spread outward from the vicinity of the outer peripheral portion of the.
- the lead terminals 4a protruding from the molded body 8 are used as input / output terminals.
- the mold body 8 is provided with one dummy lead terminal 4a 'having no function.
- pressure sensor 1 and acceleration sensor 2 are integrally provided on lead 4 and sealed with molded body 8, pressure sensor 1 and acceleration sensor 2 Compared to a case where and are individually installed on the mounting board, the area required on the mounting board for installation can be reduced. Further, since the signal processing circuit 3 controls the on / off operation of the pressure sensor 1 based on the signal of the acceleration sensor 2, power can be saved. Therefore, when a battery is mounted on the sensor device, the size of the battery can be reduced.
- the force S that combines the pressure sensor and the acceleration sensor, or a different type of sensor may be combined.
- the acceleration sensor and the rotational angular velocity sensor may be combined so that the signal processing circuit activates the acceleration sensor only when the rotational angular velocity is detected.
- Such a sensor device can be used, for example, in a vehicle such as an automobile to detect acceleration in a lateral direction with respect to the traveling direction only when the steering wheel is turned and the direction is changed.
- other physical quantity sensors may be additionally provided within the scope of the present invention.
- Embodiment 3 of the present invention will be specifically described with reference to FIG.
- the pressure sensor 1 and the acceleration sensor 2 have almost the same height dimension or thickness. That is, the lower surfaces of the pressure sensor 1 and the acceleration sensor 2 are at the height positions indicated by broken lines. Further, the upper mold body 8a and the lower mold body 8a
- the molded body 8b has a height dimension ta (thickness) between the upper surface of the upper molded body 8a and the upper surface of the lead 4, and the distance between the lower surface of the lower molded body 8b and the lower surfaces of the pressure sensor 1 and the acceleration sensor 2. It is formed so that the height dimension tb (thickness) is substantially the same.
- Other configurations are the same as those of the above-described second embodiment, and a description thereof will not be repeated.
- the thicknesses of pressure sensor 1 and acceleration sensor 2 are almost the same.
- the pressure sensor 1 and the acceleration sensor 2 is substantially the same on the upper surface side and the lower surface side, the pressure sensor 1 and the acceleration sensor 2
- the thermal stress caused by the difference in linear expansion coefficient between the physical quantity sensor (sensor element) of the above and the molded body 8 made of a plastic material can be reduced, and the temperature dependency can be reduced.
- the above characteristic configuration of the sensor device according to Embodiment 3 can be applied to Embodiments 1 and 2 described above and Embodiments 4 to 18 described later.
- the fourth embodiment of the present invention will be specifically described with reference to FIG.
- the molded body 8 composed of the upper molded body 8a above the lead 4 and the lower molded body 8b below the lead 4 is different from the upper molded body 8a.
- the lower mold body 8b is formed in a different taper shape so as to have the same volume.
- Other configurations are the same as those in the above-described second embodiment, and thus description thereof will be omitted.
- the cylindrical portion 12 having an inner diameter substantially equal to the inner diameter of the through hole 7b, that is, the cylindrical protrusion is formed by molding.
- the pressure introducing path 7 is formed integrally with the mold body 8 so as to extend.
- Other configurations are the same as those in the above-described second embodiment, and thus description thereof will be omitted.
- the cylindrical portion 12 is formed integrally with the mold body 8 so as to extend the pressure introduction path 7, for example, the sensor device is mounted on a mounting board. If the entire mounting board is sealed with silicone resin, etc. to protect It is possible to prevent silicon resin or the like from entering the entrance 7. Further, it is possible to prevent foreign matters such as dust and dust from entering the pressure introduction path 7.
- the pressure sensor disposition portion 9 of the lead 4 is provided with four small-diameter portions 7c for transmitting external pressure to the pressure receiving portion 6. You. Therefore, four pressure introduction paths 7 are formed by these small diameter portions 7c and the through holes 7b provided in the upper mold body 8a.
- Other configurations are the same as those of the above-described second embodiment, and a description thereof will not be repeated.
- the force provided with the four small-diameter portions 7c or the pressure introduction passages 7 is not limited to four. Therefore, the same effect can be obtained by forming a plurality of small diameter portions 7c or pressure introduction passages 7. Further, a plurality of pressure introducing paths 7 may be formed by individually providing through holes 7b for each small diameter portion 7c.
- the above characteristic configuration of the sensor device according to the fourth embodiment can be applied to the fifth embodiment.
- a bonding surface 4b to be soldered to a mounting board 13 made of a printed board is provided at the tip of each lead terminal 4a.
- the bonding surface 4b and the lower surface of the mold body 8 are separated by a certain distance.
- the bonding surface 4b is formed by bending the lead terminal 4a downward so as to be parallel to the side surface of the molded body 8, and then making the tip of the lead terminal 4a parallel to the lower surface of the molded body 8. It is formed by bending outward with respect to 8.
- the sensor device is connected The joint surface 4b and the mounting board 13 are soldered to be joined to the mounting board 13.
- Other configurations are the same as those in the above-described second embodiment, and thus description thereof will be omitted.
- the bonding surface 4b is formed so as to have a fixed space with respect to the lower surface of the mold body 8, so that the sensor device and the mounting board 13 are bonded.
- the lower mold body 8b and the mounting substrate 13 do not come into contact with each other. That is, only the bonding surface 4b comes into contact with the mounting substrate 13 and is soldered. For this reason, even if the mounting substrate 13 is deformed, the influence of the stress caused by the deformation can be reduced.
- the above characteristic configuration of the sensor device according to Embodiment 7 can also be applied to Embodiments 16 to 16 and Embodiment 8 described later.
- Embodiment 8 of the present invention will be specifically described with reference to FIG.
- the lead 4 is provided in the device arrangement section in which the pressure sensor arrangement section 9, the acceleration sensor arrangement section and the signal processing circuit arrangement section are integrally formed.
- the signal processing circuit 3 is provided on the upper surface of the device placement unit 14
- the acceleration sensor 2 is provided on the lower surface of the device placement unit 14. That is, the device arrangement portion 14 of the lead 4 is sandwiched between the signal processing circuit 3 and the acceleration sensor 2.
- the other configuration is the same as that of the second embodiment, and the description thereof will not be repeated.
- the signal processing circuit 3 and the acceleration sensor 2 are provided on the upper surface and the lower surface of the lead 4, respectively, so that the sensor device can be downsized.
- the lead 4 formed of a metal such as iron-nickel alloy is sandwiched between the signal processing circuit 3 and the acceleration sensor 2, the noise of the signal processing circuit 3 affects the acceleration sensor 2 by the lead 4. Can be suppressed.
- the above characteristic configuration of the sensor device according to Embodiment 8 can be applied to Embodiment 27 described above.
- the sensor device is particularly useful for measuring a plurality of physical quantities, and is suitable for use as a sensor for detecting a plurality of physical quantities, such as a tire pressure sensor for measuring pressure and acceleration.
- RU tire pressure sensor
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- General Physics & Mathematics (AREA)
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Fluid Pressure (AREA)
- Pressure Sensors (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04772226A EP1659386A4 (en) | 2003-08-26 | 2004-08-26 | SENSOR DEVICE |
US10/531,074 US7243561B2 (en) | 2003-08-26 | 2004-08-26 | Sensor device |
JP2005513360A JPWO2005019790A1 (ja) | 2003-08-26 | 2004-08-26 | センサ装置 |
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US (1) | US7243561B2 (ja) |
EP (1) | EP1659386A4 (ja) |
JP (1) | JPWO2005019790A1 (ja) |
KR (1) | KR20050059273A (ja) |
CN (1) | CN100381804C (ja) |
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JP2010145274A (ja) * | 2008-12-19 | 2010-07-01 | Panasonic Corp | 慣性センサ |
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- 2004-08-26 KR KR1020057006710A patent/KR20050059273A/ko active Search and Examination
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Also Published As
Publication number | Publication date |
---|---|
JPWO2005019790A1 (ja) | 2006-10-19 |
KR20050059273A (ko) | 2005-06-17 |
EP1659386A1 (en) | 2006-05-24 |
US7243561B2 (en) | 2007-07-17 |
US20060053908A1 (en) | 2006-03-16 |
CN100381804C (zh) | 2008-04-16 |
EP1659386A4 (en) | 2007-08-29 |
CN1701223A (zh) | 2005-11-23 |
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