WO2016035277A1 - 角速度センサ素子 - Google Patents
角速度センサ素子 Download PDFInfo
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- WO2016035277A1 WO2016035277A1 PCT/JP2015/004247 JP2015004247W WO2016035277A1 WO 2016035277 A1 WO2016035277 A1 WO 2016035277A1 JP 2015004247 W JP2015004247 W JP 2015004247W WO 2016035277 A1 WO2016035277 A1 WO 2016035277A1
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- angular velocity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/56—Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces
- G01C19/5607—Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces using vibrating tuning forks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/56—Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces
- G01C19/5607—Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces using vibrating tuning forks
- G01C19/5621—Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces using vibrating tuning forks the devices involving a micromechanical structure
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/30—Piezoelectric or electrostrictive devices with mechanical input and electrical output, e.g. functioning as generators or sensors
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/30—Piezoelectric or electrostrictive devices with mechanical input and electrical output, e.g. functioning as generators or sensors
- H10N30/302—Sensors
Definitions
- the present disclosure relates to an angular velocity sensor element used for an angular velocity sensor used in various electronic devices.
- FIG. 8 is a top view of a conventional angular velocity sensor element.
- the fixing part 11, the fixing part 13, the detection body 12, the detection body 14, and the detection body 15 are formed of silicon (hereinafter referred to as Si).
- One end of the detection body 12 is connected to the fixed portion 11, and the other end of the detection body 12 is connected to the fixed portion 13.
- a detection electrode (not shown) is provided on the upper surface of the detection body 12.
- the detection body 14 is connected to the approximate center of the detection body 12.
- the detection body 14 extends in a direction (left and right direction in FIG. 8) substantially perpendicular to the direction in which the detection body 12 extends (up and down direction in FIG. 8).
- a detection electrode (not shown) is provided on the upper surface of the detection body 14.
- the detection body 15 is connected to the approximate center of the detection body 12.
- the detection body 15 extends in a direction (left and right direction in FIG. 8) substantially perpendicular to the direction in which the detection body 12 extends (up and down direction in FIG. 8).
- the detection body 15 extends in a direction opposite to the direction in which the detection body 14 extends from the detection body 12.
- the detection body 14 and the detection body 15 are arranged in a straight line.
- a detection electrode (not shown) is provided on the upper surface of the detection body 15.
- the driving body 16 extends as a whole from the other end of the detection body 14 in an oblique +45 degree direction that is a direction between the direction in which the detection body 12 extends and the direction in which the detection body 14 extends.
- a driving electrode (not shown) is provided on the upper surface of the driving body 16.
- the driving body 17 extends as a whole from the other end of the detection body 14 in a direction of ⁇ 45 degrees obliquely between the direction in which the detection body 12 extends and the direction in which the detection body 14 extends. Yes.
- a driving electrode (not shown) is provided on the upper surface of the driving body 17.
- the drive body 18 extends from the other end of the detection body 15 as a whole in a direction of ⁇ 45 degrees obliquely, which is a direction between the direction in which the detection body 12 extends and the direction in which the detection body 15 extends. .
- a driving electrode (not shown) is provided on the upper surface of the driving body 18.
- the drive body 19 extends from the other end of the detection body 15 as a whole in an oblique +45 degree direction that is a direction between the direction in which the detection body 12 extends and the direction in which the detection body 15 extends.
- a driving electrode (not shown) is provided on the upper surface of the driving body 19.
- the detection body 14 and the detection body 15 are twisted, and the fixing portion 11 side of the detection body 12 and the fixing portion 13 side of the detection body 12 are bent in directions opposite to each other.
- a charge corresponding to the angular velocity is generated on a detection electrode (not shown) provided on the upper surface of the detection body 12. Then, the electric charge is amplified via a circuit pattern (not shown), and an angular velocity around the Y axis is detected.
- Patent Literature 1 is known as prior literature information regarding this application.
- the angular velocity sensor element of the present disclosure has the following configuration.
- a fixed portion a first detection electrode connected to the fixed portion; provided with a first detection electrode; extending in a first direction; and one end connected to the first detection body;
- a second detection body that extends in a second direction, which is a substantially vertical direction, and is provided with a second detection electrode; and is connected to the other end of the second detection body;
- a driving body provided on the same plane as the second detection body and provided with a driving electrode.
- the drive body has a folded shape having two or more bent portions, and the direction from the connection portion between the second detection body and the drive body to the end of the drive body is the first view in the top view. A direction between the direction and the second direction.
- Top view of angular velocity sensor element in embodiment Top view of angular velocity sensor element in embodiment Side sectional view of drive electrode of angular velocity sensor element in embodiment
- the schematic diagram which shows the state which carries out the vibration analysis of the drive body and weight part of the angular velocity sensor element in embodiment by FEA Assembly process diagram of angular velocity sensor element in embodiment Assembly process diagram of angular velocity sensor element in embodiment Assembly process diagram of angular velocity sensor element in embodiment Assembly process diagram of angular velocity sensor element in embodiment Assembly process diagram of angular velocity sensor element in embodiment Assembly process diagram of angular velocity sensor element in embodiment Assembly process diagram of angular velocity sensor element in embodiment
- ⁇ is a constant
- l is the length [m] of the driving vibrator
- E is the longitudinal elastic modulus [Pa]
- I is the secondary moment of inertia [m 4 ] of the driving vibrator
- ⁇ is the density of the driving vibrator [Kg / m 3 ]
- A is the cross-sectional area [m 2 ] of the driving vibrator
- S is the area [m 2 ] in the direction in which the driving body extends.
- the angular velocity in the biaxial direction can be detected by the detection body 12, the detection body 14, and the detection body 15.
- the drive body 16, the drive body 17, the drive body 18, and the drive body 19 extend obliquely at +45 degrees or -45 degrees with respect to the X axis and the Y axis, the total length of the drive body is long. Therefore, the conventional angular velocity sensor element shown in FIG. 8 has a problem that although the drive frequency is low, the area occupied by the entire angular velocity sensor element is large.
- FIG. 1A and 1B are top views of the angular velocity sensor element in the present embodiment.
- FIG. 1A and FIG. 1B are the same figure, in FIG. 1B, the boundary of the main component is shown with the dotted line. Further, in order not to complicate the drawing, FIG. 1B is provided with reference numerals only for main components.
- FIG. 2 is a side sectional view of the drive electrode in the angular velocity sensor element of the present embodiment.
- the fixing part 51 is made of Si.
- a driving electrode land 52, a driving electrode land 53, a detection electrode land 54, a detection electrode land 55, and a ground (GND) electrode land 56 are provided on the upper surface of the fixed portion 51.
- the detection body 57 is made of Si. One end of the detection body 57 is connected to the fixing portion 51. A detection electrode 58 and a detection electrode 59 are provided on the upper surface of the detection body 57.
- a common GND electrode (not shown) made of an alloy thin film of Pt and Ti, and a piezoelectric layer made of a PZT thin film provided on the upper surface of the common GND electrode (not shown) (Not shown) is configured. That is, the detection electrode 58 is provided on the upper surface of the detection body 57 via the common GND electrode and the piezoelectric layer.
- the fixing part 60 is made of Si.
- the fixing unit 60 is connected to the other end of the detection body 57.
- a detection electrode land 61, a detection electrode land 62, and a monitor electrode land 63 are provided on the upper surface of the fixed portion 60.
- the detection electrode 58 formed on the detection body 57 is electrically connected to the detection electrode land 54 formed on the fixed portion 51.
- the detection electrode 59 formed on the detection body 57 is electrically connected to the detection electrode land 61 formed on the fixed portion 60.
- the detection body 64 is made of Si. One end of the detection body 64 is connected to the approximate center of the detection body 57. And the detection body 64 is extended from the approximate center of the detection body 57 in the direction (right direction in FIG. 1A) substantially perpendicular to the direction in which the detection body 57 extends (up and down direction in FIG. 1A). .
- a detection electrode 65 is provided on the upper surface of the detection body. The detection electrode 65 formed on the detection body 64 is electrically connected to the detection electrode land 55 formed on the fixed portion 51.
- the detection body 66 is made of Si. One end of the detection body 66 is connected to the approximate center of the detection body 57. And the detection body 66 is extended from the approximate center of the detection body 57 in the direction (left direction in FIG. 1A) substantially perpendicular to the direction (vertical direction in FIG. 1A) in which the detection body 57 extends. . That is, the direction in which the detection body 64 extends from the detection body 57 and the direction in which the detection body 66 extends from the detection body 57 are opposite directions. The detection body 64 and the detection body 66 are integrally formed through a detection body 57 on a straight line. A detection electrode 67 is provided on the upper surface of the detection body 66.
- the detection electrode 67 formed on the detection body 66 is electrically connected to the detection electrode land 62 formed on the fixed portion 60.
- the driving body 68 is made of Si.
- the direction in which the drive body 68 extends as a whole is defined as the direction from the center of the other end of the detection body 64 to the center of one end of the drive unit 68
- the direction in which the drive body 68 extends as a whole is It becomes “direction A” indicated by an arrow in FIG. 1A. That is, as a whole, the driving body 68 extends in a direction between the extending direction of the detecting body 57 (hereinafter referred to as the X-axis direction) and the extending direction of the detecting body 64 (hereinafter referred to as the Y-axis direction). Put out.
- the direction A is + ⁇ degrees from the Y-axis direction.
- the drive body 68 is folded back by combining a drive unit 69 extending in the same direction as the direction in which the detection body 57 extends and a drive unit 70 extending in the same direction as the direction in which the detection body 64 extends. Is configured.
- the drive part 69 and the drive part 70 are each formed in multiple numbers, since drawing becomes complicated, the code
- the drive body 68 By combining the drive unit 69 extending in the X-axis direction and the drive unit 70 extending in the Y-axis direction, the drive body 68 has a plurality of bent portions 100 (shown in FIG. 1B) and has a folded shape. .
- a pair of drive electrodes 71 are provided on the upper surface of the drive body 68.
- FIG. 2 is a side sectional view of the drive electrode of the angular velocity sensor element.
- a common GND electrode 72 made of an alloy thin film of Pt and Ti, and a piezoelectric layer 73 made of a PZT thin film provided on the upper surface of the common GND electrode 72 are provided below the drive electrode 71.
- the drive electrode 71 is provided on the upper surface of the drive body 68 via the common GND electrode 72 and the piezoelectric layer 73.
- the angular velocity detection element in the present embodiment is connected to the fixed portion 51, the fixed portion 51, the detection electrode 58 is provided, and the detection body 57 extends in the X-axis direction.
- the detection body 64 that extends in the Y-axis direction, which is substantially perpendicular to the X-axis direction, and is provided with the detection electrode 65, and to the other end of the detection body 64.
- a driving body 68 provided on the same plane as the body 64 and provided with a driving electrode 71.
- the driving body 68 has a folded shape having two or more bent portions 100.
- the direction from the connection part of the detection body 64 and the drive body 68 to the edge part of the drive body 68 is a direction (direction A) between the X-axis direction and the Y-axis direction when viewed from above.
- the drive body 68 extends in a direction different from the direction in which the detection body 57 extends (X-axis direction) and the direction in which the detection body 64 extends (Y-axis direction). Therefore, the angular velocity sensor in the biaxial direction can be detected by the vibration of the driving body 68.
- the driving body 68 in the present embodiment has a folded shape, the driving frequency of the driving body is low, and a small angular velocity sensor element can be provided.
- the driving body 68 is a driving portion 69 extending in the X-axis direction, which is the direction in which the detection body 57 extends, and the direction in which the detection body 64 extends.
- a drive unit 70 extending in the Y-axis direction.
- the drive unit 69 and the drive unit 70 are provided with drive electrodes 71.
- the angular velocity sensor element can be driven to vibrate in the direction (Y-axis direction) perpendicular to the extending direction (X-axis direction) of the drive unit 69 by the drive unit 69. Further, the angular velocity sensor element can be driven to vibrate in the direction (X-axis direction) perpendicular to the extending direction (Y-axis direction) of the driving unit 70 by the driving unit 70. Thereby, the output sensitivity of the angular velocity detection signal in the biaxial direction can be improved.
- the angular velocity sensor element in the present embodiment preferably further includes a weight portion 74.
- the weight portion 74 is connected to the end portion of the driving body 68.
- the Coriolis force generated by the angular velocity increases due to the mass increase by the weight portion 74. Therefore, the sensitivity of the biaxial angular velocity detection signal can be improved.
- the drive frequency in the case where the drive body 16 in the conventional angular velocity sensor element described with reference to FIG. 8 has a linear shape is calculated.
- the required drive frequency f 7.35 ⁇ 10 5 [Hz].
- element length b 5.76 ⁇ 10 ⁇ 4 [m]
- the area S occupied by the first driver 68 and the first weight portion 74 is 1.83.
- the drive body 68 extends in a direction different from both the direction in which the detection body 57 extends and the direction in which the detection body 64 extends. Therefore, the angular velocity sensor in the biaxial direction can be detected by the vibration of the driving body 68. Further, since the driving body 68 has a folded shape, the driving frequency of the driving body 68 can be lowered, and the angular velocity sensor element can be reduced in size.
- the driving body 68 in the upper right of FIG. 1 has been described, but the driving body 75 shown in the lower right of FIG. 1, the driving body 80 shown in the upper left of FIG.
- the driving body 85 shown in the lower left is the same as the driving body 68.
- the configuration of the driving body 75, the driving body 80, and the driving body 85 will be described in order, but since the configuration is the same as that of the driving body 68, a part of the description will be omitted.
- the drive body 75 is made of Si, and extends from the other end of the detection body 64 in the direction between the extension direction of the detection body 57 and the extension direction of the detection body 64 as a whole. That is, the drive body 75 extends in the direction of - ⁇ degrees.
- the drive body 75 has a folded shape formed by combining a plurality of drive units 69 extending in the X-axis direction and a second drive unit 77 extending in the Y-axis direction.
- drive part 76 and the drive part 77 are each formed in multiple numbers, since drawing becomes complicated, in FIG. 1A and FIG. 1B, the code
- a pair of drive electrodes 78 are provided on the upper surface of the drive body 75.
- the configuration of the drive electrode 78 is the same as that of the drive electrode 71 described with reference to FIG.
- the weight portion 79 is connected to the other end of the driving body 75.
- the drive body 80 is made of Si, and extends from the other end of the detection body 66 in a direction between the extension direction of the detection body 57 and the extension direction of the detection body 66. That is, the driving body 80 extends in the direction of - ⁇ degrees.
- the drive part 81 of the drive body 80 extends in the same direction as the direction in which the detection body 57 extends. Furthermore, the drive part 82 extends in the same direction as the direction in which the detection body 66 extends.
- the driving body 80 is formed in a folded shape by combining a plurality of driving portions 81 extending in the X-axis direction and a plurality of driving portions 82 extending in the Y-axis direction.
- the drive part 81 and the drive part 82 are formed in multiple numbers, respectively, since drawing becomes complicated, the code
- a pair of drive electrodes 83 are provided on the upper surface of the drive body 80.
- the configuration of the drive electrode 83 is the same as that of the drive electrode 71 described with reference to FIG.
- the weight portion 84 is connected to the other end of the driving body 80.
- the drive body 85 is made of Si, and extends from the other end of the detection body 66 in a direction between the extension direction of the detection body 57 and the extension direction of the detection body 66. That is, the drive unit 85 extends in the direction of + ⁇ degrees.
- the drive part 86 of the drive body 85 extends in the same direction as the direction in which the detection body 57 extends. Furthermore, the drive part 87 extends in the same direction as the direction in which the detection body 66 extends.
- the driving body 85 is formed in a folded shape by combining a plurality of driving units 86 extending in the X-axis direction and a plurality of driving units 87 extending in the Y-axis direction.
- drive part 86 and the drive part 87 are each formed in multiple numbers, since drawing becomes complicated, in FIG. 1A and FIG. 1B, the code
- a pair of drive electrodes 88 are provided on the upper surface of the drive body 85.
- the configuration of the drive electrode 88 is the same as that of the drive electrode 71 described with reference to FIG.
- the weight portion 89 is connected to the other end of the driving body 85.
- the driving bodies 68, 75, 80, and 85 have the same configuration. Since the angular velocity sensor element according to the present embodiment includes the four driving bodies 68, 75, 80, and 85, the volume of the angular velocity sensor element as a whole can be greatly reduced as compared with the related art.
- a monitor electrode 91 is provided between the drive electrode 71 and the drive electrode 78 and between the drive electrode 83 and the drive electrode 88, respectively.
- a common GND electrode (not shown) made of an alloy thin film of Pt and Ti, and a piezoelectric layer made of a PZT thin film provided on the upper surface of the common GND electrode (not shown) (Not shown) is configured. That is, the monitor electrode 91 is provided on the upper surface of the drive electrode 68 or the drive electrode 75 via the common GND electrode and the piezoelectric layer.
- FIGS. 4A to 4E are assembly process diagrams of the angular velocity sensor element according to the present embodiment.
- a drive electrode land 52, a drive electrode land 53, a detection electrode land 54, a detection electrode land 55, a GND electrode land 56, a detection electrode land 61, a detection electrode land 62, and a monitor electrode land are previously formed on the upper surface.
- 63 and a wafer 92 on which a wiring pattern is formed are prepared. 4A to 4E, the drive electrode land 52, the drive electrode land 53, the detection electrode land 54, the detection electrode land 55, the GND electrode land 56, the detection electrode land 61, the detection electrode land 62, the monitor electrode land 63, The wiring pattern is not shown.
- a resist film 93 such as aluminum, titanium, silicon oxide, or silicon nitride is applied to the upper surface of the wafer 92 by spin coating.
- the resist film 93 is patterned into a predetermined shape by photolithography.
- a fluorine-based gas such as SF 6 or CF 6 is introduced, so that the resist film of the wafer 92 made of Si is formed as shown in FIG. 4C.
- the groove 94 is formed by etching the portion other than the portion provided with 93.
- a film 95 provided with an adhesive layer (not shown) having a function of protecting the upper surface of the wafer 92 during back grinding of 50 to 200 microns is pasted on the upper surface of the resist film 93.
- the wafer 92 is turned upside down, and the film 95 provided on the upper surface side of the wafer 92 is fixed to a chuck table (not shown).
- the back surface of the wafer 92 is ground by rotating the back grind wheel 96.
- the adhesive force of the film 95 is reduced by irradiating ultraviolet rays (UV) to peel the film 95 from the lower surface of the resist film 93, and then the resist film 93 is removed and the angular velocity of each piece from the wafer 92 is also removed. Remove the sensor element.
- UV ultraviolet rays
- FIG. 5 is a diagram showing a state in which the angular velocity sensor element according to the present embodiment is driven to vibrate in the X-axis direction and the Y-axis direction.
- FIG. 7 is a diagram showing a state of operation when an angular velocity around the Y axis is applied to the angular velocity sensor element in the present embodiment.
- an AC voltage is applied to the drive electrode land 52 (not shown in FIGS. 5 to 7) and the drive electrode land 53 (not shown in FIGS. 5 to 7) in the fixed portion 51.
- the drive body 68, the drive body 75, the drive body 80, and the drive body 85 are driven to vibrate at a speed V in the X-axis direction and the Y-axis direction according to the phase of the AC voltage.
- This drive vibration is transmitted to the weight portion 74, the weight portion 79, the weight portion 84, and the weight portion 89, and as shown in FIG. 5, drive vibration is performed at a speed V in the X-axis direction and the Y-axis direction.
- the weight part 74, the weight part 79, the weight part 84, and the weight part 89 vibrate around the X axis by Coriolis force. Then, the detection body 57 is twisted, and the detection body 64 and the detection body 66 are bent in directions opposite to each other.
- a charge corresponding to the angular velocity is generated on the detection electrode 65 provided on the detection body 64 and is output to the detection electrode land 55 provided on the fixed portion 51 via a circuit pattern (not shown). .
- a charge corresponding to the angular velocity is generated on the detection electrode 67 provided on the detection body 66 and is output to the detection electrode land 62 provided on the fixed portion 60 via a circuit pattern (not shown).
- the charges output to the detection electrode land 55 and the detection electrode land 62 are converted into a voltage, and further, the charges are amplified. Then, the angular velocity around the X axis is detected by taking the difference between the amplified charges.
- the weight part 74, the weight part 79, the weight part 84, and the weight part 89 vibrate around the Y axis due to Coriolis force. Then, the detection body 64 and the detection body 66 are twisted, and in the detection body 57, the fixed portion 51 side and the fixed portion 60 side bend in directions opposite to each other.
- a charge corresponding to the angular velocity is generated on the detection electrode 58 provided on the detection body 57 and is output to the detection electrode land 54 provided on the fixed portion 51 via a circuit pattern (not shown). .
- a charge corresponding to the angular velocity is generated on the detection electrode 59 provided on the detection body 57 and is output to the detection electrode land 61 provided on the fixed portion 60 via a circuit pattern (not shown).
- the charges output to the detection electrode land 54 and the detection electrode land 61 are converted into a voltage, and these charges are further amplified. Thereafter, the angular velocity around the Y axis is detected by taking the differential of the amplified charges.
- the driving body 68 includes a driving unit 69 that is substantially parallel to the detection body 57 and a driving unit 70 that is substantially parallel to the detection body 64, and the driving unit.
- the drive electrode 71 is provided on both the drive unit 70 and the drive unit 70. According to this configuration, since the drive electrode 71 is provided in both the drive unit 69 and the drive unit 70, the drive unit 69 is driven to vibrate in a direction perpendicular to the extending direction of the drive unit 69, and the drive unit 70 drives the drive unit. It can be driven to vibrate in a direction perpendicular to the extending direction of 70. Therefore, the sensitivity of the biaxial angular velocity detection signal can be improved.
- the weights 74, 79, 84, and 89 are formed, but it is not always necessary to form the weight.
- the drive body 68 is configured by combining a drive unit 69 extending in the X-axis direction and a drive unit 70 extending in the Y-axis direction, but is combined with a drive unit extending in the oblique direction. May be.
- the drive part which comprises the drive body 68 does not necessarily extend only in either the X-axis direction or the Y-axis direction. It is only necessary that the driving body 68 extends in the direction between the X-axis direction and the Y-axis direction as a whole. The same applies to the other driving bodies 75, 80, 85.
- the driving body 68 of the present embodiment has the four bent portions 100, it is not always necessary to have the four bent portions 100. If the driving body 68 has at least two bent portions 100, a folded shape can be formed. The same applies to the other driving bodies 75, 80, 85.
- a small angular velocity sensor element with a low driving frequency of the driving body.
- it is useful as an angular velocity sensor element used in an angular velocity sensor used in various electronic devices.
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Abstract
Description
図1Aおよび図1Bは本実施の形態における角速度センサ素子の上面図である。なお、図1Aおよび図1Bは同じ図であるが、図1Bにおいては、主要な構成要素の境界を点線で示している。また、図面が煩雑にならないよう、図1Bについては、主要な構成についてのみ符号を付している。図2は本実施の形態の角速度センサ素子における駆動電極の側断面図である。
次に、駆動体68および錘部74の振動解析の結果について説明する。
駆動体75はSiで形成されており、検出体64の他端から全体として、検出体57の延出方向と検出体64の延出方向との間の方向に延出する。つまり、駆動体75は、-α度の方向に延出している。
駆動体80はSiで形成されており、検出体66の他端から全体として、検出体57の延出方向と検出体66の延出方向との間の方向に延出する。つまり、駆動体80は、-α度の方向に延出している。
駆動体85はSiで形成されており、検出体66の他端から全体として、検出体57の延出方向と検出体66の延出方向との間の方向に延出する。つまり、駆動部85は、+α度の方向に延出している。
次に本実施の形態の角速度センサ素子の組立方法について図4A~図4Eを参照しながら説明する。図4A~図4Eは、本実施の形態における角速度センサ素子の組立工程図である。
次に、実施の形態における角速度センサ素子の動作について図1A、図5~図7を参照しながら説明する。
52 駆動電極ランド
53 電極ランド
54,55,61,62 検出電極ランド
56 GND電極ランド
57,64,66 検出体
58,59,65,67 検出電極
63 モニター電極ランド
68,75,80,85 駆動体
69,76,81,86 駆動部
70,77,82,87 駆動部
71,78,83,88 駆動電極
74,79,84,89 錘部
91 モニター電極
92 ウェハ
93 レジスト膜
94 溝
95 フィルム
96 バックグラインドホイール
100 屈曲部
Claims (3)
- 固定部と、
前記固定部と接続され、第1の検出電極が設けられ、第1の方向に延出する第1の検出体と、
前記第1の検出体に一端が接続され、前記第1の方向と略垂直な方向である第2の方向に延出し、かつ、第2の検出電極が設けられた第2の検出体と、
前記第2の検出体の他端に接続され、前記第1の検出体および前記第2の検出体と同一平面上に設けられ、かつ、駆動電極が設けられた駆動体と、
を備え、
前記駆動体は、2つ以上の屈曲部を有する折り返し形状であり、
前記第2の検出体と前記駆動体との接続部から、前記駆動体の端部までの方向が、上面視で、前記第1の方向と前記第2の方向の間の方向である
ことを特徴とする角速度センサ素子。 - 前記駆動体は、
前記第1の検出体が延出する方向である前記第1の方向に延出する第1の駆動部と、
前記第2の検出体が延出する方向である前記第2の方向に延出する第2の駆動部
とを有し、
前記第1の駆動部および前記第2の駆動部には、駆動電極が設けられている
ことを特徴とする請求項1記載の角速度センサ素子。 - 錘部を更に備え、
前記錘部は、前記駆動体の前記端部に接続されている、
ことを特徴とする請求項1記載の角速度センサ素子。
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JP2016546293A JPWO2016035277A1 (ja) | 2014-09-01 | 2015-08-25 | 角速度センサ素子 |
US15/501,560 US20170219349A1 (en) | 2014-09-01 | 2015-08-25 | Angular velocity sensor element |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2014-176829 | 2014-09-01 | ||
JP2014176829 | 2014-09-01 |
Publications (1)
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WO2016035277A1 true WO2016035277A1 (ja) | 2016-03-10 |
Family
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PCT/JP2015/004247 WO2016035277A1 (ja) | 2014-09-01 | 2015-08-25 | 角速度センサ素子 |
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US (1) | US20170219349A1 (ja) |
JP (1) | JPWO2016035277A1 (ja) |
WO (1) | WO2016035277A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210247187A1 (en) * | 2018-06-13 | 2021-08-12 | Kyocera Corporation | Sensor element and angular velocity sensor |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007086337A1 (ja) * | 2006-01-24 | 2007-08-02 | Matsushita Electric Industrial Co., Ltd. | 慣性力センサ |
JP2007232710A (ja) * | 2006-01-31 | 2007-09-13 | Nec Tokin Corp | 振動ジャイロ用振動子 |
WO2011161958A1 (ja) * | 2010-06-25 | 2011-12-29 | パナソニック株式会社 | 慣性力検出素子とそれを用いた慣性力センサ |
WO2013061558A1 (ja) * | 2011-10-24 | 2013-05-02 | パナソニック株式会社 | 角速度センサとそれに用いられる検出素子 |
-
2015
- 2015-08-25 WO PCT/JP2015/004247 patent/WO2016035277A1/ja active Application Filing
- 2015-08-25 JP JP2016546293A patent/JPWO2016035277A1/ja active Pending
- 2015-08-25 US US15/501,560 patent/US20170219349A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007086337A1 (ja) * | 2006-01-24 | 2007-08-02 | Matsushita Electric Industrial Co., Ltd. | 慣性力センサ |
JP2007232710A (ja) * | 2006-01-31 | 2007-09-13 | Nec Tokin Corp | 振動ジャイロ用振動子 |
WO2011161958A1 (ja) * | 2010-06-25 | 2011-12-29 | パナソニック株式会社 | 慣性力検出素子とそれを用いた慣性力センサ |
WO2013061558A1 (ja) * | 2011-10-24 | 2013-05-02 | パナソニック株式会社 | 角速度センサとそれに用いられる検出素子 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210247187A1 (en) * | 2018-06-13 | 2021-08-12 | Kyocera Corporation | Sensor element and angular velocity sensor |
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US20170219349A1 (en) | 2017-08-03 |
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