WO2020246444A1 - 測定器 - Google Patents
測定器 Download PDFInfo
- Publication number
- WO2020246444A1 WO2020246444A1 PCT/JP2020/021677 JP2020021677W WO2020246444A1 WO 2020246444 A1 WO2020246444 A1 WO 2020246444A1 JP 2020021677 W JP2020021677 W JP 2020021677W WO 2020246444 A1 WO2020246444 A1 WO 2020246444A1
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- WO
- WIPO (PCT)
- Prior art keywords
- electrodes
- tooth
- comb tooth
- pair
- portions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/053—Measuring electrical impedance or conductance of a portion of the body
- A61B5/0537—Measuring body composition by impedance, e.g. tissue hydration or fat content
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6813—Specially adapted to be attached to a specific body part
- A61B5/6814—Head
- A61B5/682—Mouth, e.g., oral cavity; tongue; Lips; Teeth
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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
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/24—Housings ; Casings for instruments
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0209—Special features of electrodes classified in A61B5/24, A61B5/25, A61B5/283, A61B5/291, A61B5/296, A61B5/053
Definitions
- the present invention relates to a measuring instrument.
- an oral moisture measuring device as a measuring device that a measurer holds by hand to measure an object (see, for example, Patent Documents 1 and 2).
- a measuring instrument has a capacitance type sensor unit at the tip of the probe unit, presses the measurement surface of the sensor unit against the surface to be measured such as the tongue mucosa to be the object, and moisture of the object Measure the amount.
- the sensor unit of the measuring instrument of Patent Document 2 has a comb-shaped comb-shaped electrode provided on one main surface of the substrate and an amplifier circuit provided on the other main surface side of the substrate. There is.
- the comb tooth electrode and the amplifier circuit are electrically connected via a conductive member provided in a via hole (contact hole) formed on the substrate.
- a pair of comb tooth electrodes are provided on the main surface of the substrate, and when the measurement surface of the sensor unit is pressed against the surface to be measured for measurement, the sensor unit is used.
- an external force (load) associated with pressing acts. As a result, the sensor unit may be damaged.
- the present invention has been made to solve the above problems, and an object of the present invention is to provide a measuring instrument capable of reducing damage to a sensor unit.
- the measuring instrument includes a substrate having a first main surface and a second main surface, a pair of comb tooth electrodes provided on the first main surface, and the second main surface and the measuring instrument.
- a sensor unit having a pair of back surface electrodes corresponding to the pair of comb tooth electrodes is provided, and each of the pair of comb tooth electrodes has a plurality of tooth portions and a connecting portion for connecting the tooth portions.
- the substrate is a tooth portion in a region surrounded by tooth portions located at both ends in the direction in which the plurality of tooth portions are arranged in the pair of comb tooth electrodes and the connection portion of the pair of comb tooth electrodes.
- a via hole conductor is provided at a position corresponding to the above, and the via hole conductor connects the comb tooth electrode and the back surface electrode.
- the via hole conductor which has many dissimilar interfaces and is likely to be affected by strain due to external force, is provided with the tooth portions located at both ends in the direction in which the plurality of tooth portions are arranged in the pair of comb tooth electrodes.
- the via hole conductor is surrounded by the tooth portion and the connection portion.
- it is easier to disperse the external force as compared with the case where the position of the via hole conductor is set at the connection portion or the case where the position of the via hole conductor is set at the tooth portions located at both ends in the direction in which the plurality of tooth portions are lined up in the comb tooth electrode. Therefore, the external force acting on the comb tooth electrode can be relaxed from the via hole conductor.
- the via hole conductor relatively inside (center side), the effect of resisting external force can be enhanced, so that damage to the sensor portion can be reduced.
- Schematic rear view of the sensor unit in the modified example. Schematic plan view of the sensor unit in the reference example.
- Schematic plan view of the sensor unit in the modified example Schematic rear view of the sensor unit in the modified example.
- Schematic plan view of the sensor unit in the modified example Schematic rear view of the sensor unit in the modified example.
- Schematic plan view of the sensor unit in the modified example Schematic rear view of the sensor unit in the modified example.
- Schematic plan view of the sensor unit in the modified example Schematic plan view of the sensor unit in the modified example.
- the measuring instrument 10 has a main body 11 and a cover 12 attached to the main body 11.
- the measuring device 10 is an oral water content measuring device that measures, for example, the amount of water in the oral cavity as a measurement target.
- the main body 11 has a grip portion 21 in one end region in the longitudinal direction of the main body 11 and a probe portion 31 in the other end region in the longitudinal direction of the main body 11.
- the grip portion 21 is formed in a substantially rectangular parallelepiped shape that is long in the same direction as the longitudinal direction of the main body 11, and has an upper surface 21a, a lower surface 21b, side surfaces 21c, 21d, and end surfaces 21e, 21f.
- a display unit 22 for displaying a measurement result or the like is provided on the upper surface 21a of the grip portion 21.
- the probe portion 31 protrudes from one end surface 21e of the grip portion 21.
- the probe portion 31 has a head portion 32 and an arm portion 33 that connects the head portion 32 to the grip portion 21.
- the head portion 32 has a rectangular parallelepiped plate shape.
- the head unit 32 includes a sensor unit 41 and an oscillation circuit unit 101.
- the sensor unit 41 includes a substantially rectangular plate-shaped substrate 42 having a first main surface 42a and a second main surface 42b, and comb teeth provided on the first main surface 42a of the substrate 42.
- the electrodes 43 and 44 and the back surface electrodes 45 and 46 provided on the second main surface 42b of the substrate 42 are provided.
- two comb tooth electrodes 43 and 44 and two back surface electrodes 45 and 45 are provided on the substrate 42 of the sensor unit 41. That is, the sensor unit 41 has a pair of comb tooth electrodes 43 and 44 and a pair of back surface electrodes 45 and 46.
- the comb tooth electrodes 43 and 44 and the back surface electrodes 45 and 46 are made of a conductive material.
- one of the pair of comb tooth electrodes 43 and 44 has a connecting portion 51 and a plurality of tooth portions 52 to 56 so as to form a comb tooth shape. It is composed.
- the connecting portion 51 of the comb tooth electrode 43 has a long strip shape in one direction.
- the connecting portion 51 of the comb tooth electrode 43 extends in the direction in which the plurality of tooth portions 52 to 56 are lined up, for example.
- the longitudinal direction of the connecting portion 51 substantially coincides with, for example, the longitudinal direction of the main body 11.
- the plurality of tooth portions 52 to 56 of the comb tooth electrode 43 extend from the connecting portion 51 in a direction orthogonal to the longitudinal direction of the connecting portion 51.
- the tooth portions 52 to 56 are connected by the connecting portion 51.
- the tooth portions 52 to 56 are provided with a gap in the longitudinal direction of the connecting portion 51. Five tooth portions 52 to 56 of this embodiment are provided.
- the other comb tooth electrode 44 of the pair of comb tooth electrodes 43, 44 has a connecting portion 61 and a plurality of tooth portions 62 to 67, and is configured to form a comb tooth shape.
- the connecting portion 61 of the comb tooth electrode 44 has a long strip shape in one direction.
- the connecting portion 61 of the comb tooth electrode 44 extends in the direction in which the plurality of tooth portions 62 to 67 are arranged, for example.
- the connecting portion 61 has a long strip shape in the same direction as the connecting portion 51 of the comb tooth electrode 43. That is, the longitudinal direction of the connecting portion 61 substantially coincides with the longitudinal direction of the main body 11.
- the plurality of tooth portions 62 to 67 of the comb tooth electrode 44 extend from the connecting portion 61 in a direction orthogonal to the longitudinal direction of the connecting portion 61. In other words, the tooth portions 62 to 67 are connected by the connecting portion 51.
- the tooth portions 62 to 67 are provided with a gap in the longitudinal direction of the connecting portion 61.
- Six tooth portions 62 to 67 of this embodiment are provided. That is, the number of the tooth portions 52 to 56 of the comb tooth electrode 43 and the number of the tooth portions 62 to 67 of the comb tooth electrode 44 are different.
- the tooth portions 52 to 56 of the comb tooth electrode 43 are the tooth portions at both ends in the longitudinal direction of the connecting portion 51, that is, the direction in which the tooth portions 52 to 56 are aligned.
- the tooth portion arranged between the two outer tooth portions 52 and 53 in the direction in which the tooth portions 52 to 56 are aligned is referred to as the inner tooth portion 54 to 56 of the comb tooth electrode 43.
- the tooth portions 62 to 67 of the comb tooth electrode 44 the tooth portions at both ends in the longitudinal direction of the connecting portion 61, that is, in the direction in which the tooth portions 62 to 67 are aligned are referred to as the outer tooth portions 62 and 63 of the comb tooth electrode 44.
- the tooth portion arranged between the two outer tooth portions 62 and 63 in the direction in which the tooth portions 62 to 67 are aligned is referred to as the inner tooth portion 64 to 67 of the comb tooth electrode 44.
- the comb tooth electrodes 43 and 44 are arranged so that a predetermined separation distance is formed between the tooth portions 52 to 56 of the comb tooth electrode 43 and the tooth portions 62 to 67 of the comb tooth electrode 44.
- the tooth portions 52 to 56, 62 to 67 of the pair of comb tooth electrodes 43, 44 configured as described above are the outer tooth portions 52 of the comb tooth electrodes 43 among the outer tooth portions 52, 53, 62, 63.
- the outer tooth portion 62 of the comb tooth electrode 44 is arranged to face each other in the extending direction of the tooth portion.
- the distance between the end of the outer tooth portion 52 and the end of the outer tooth portion 62 (also referred to as a gap between the ends) may be the same as or substantially the same as the predetermined separation distance.
- the tooth portions 52 to 56, 62 to 67 of the pair of comb tooth electrodes 43 and 44 are the inner tooth portion 64, the inner tooth portion 54, the inner tooth portion 65, and the inner tooth from the outer tooth portion 52 and the outer tooth portion 62 side.
- the portion 55, the inner tooth portion 66, the inner tooth portion 56, the inner tooth portion 67, the outer tooth portion 53, and the outer tooth portion 63 are provided in this order. That is, the inner tooth portions 54 to 56, 64 to 67 and the outer tooth portion 53 are provided between the outer tooth portions 52 and 62 and the outer tooth portion 63.
- each comb tooth electrode 43, 44 is configured by laminating a plurality of metal layers 71, 72, 73, 74. That is, the connecting portions 51, 61 and the tooth portions 52 to 56, 62 to 67 constituting the comb tooth electrodes 43 and 44 are all configured by laminating a plurality of metal layers 71, 72, 73 and 74.
- the first metal layer 71 which is the lowest layer (the substrate 42 side) of the plurality of metal layers 71, 72, 73, 74, is provided substantially entirely along the groove portion 42c formed in the substrate 42.
- the groove portion 42c is formed, for example, according to the shape of each comb tooth electrode 43, 44.
- the first metal layer 71 is composed of, for example, silver (Ag).
- the second metal layer 72 is provided so as to cover the entire first metal layer 71.
- the second metal layer 72 is, for example, a nickel (Ni) film having a thickness of about 5.0 ⁇ m.
- the third metal layer 73 is provided so as to cover the entire second metal layer 72.
- the third metal layer 73 is, for example, a palladium (Pd) film having a thickness of about 0.15 ⁇ m.
- the fourth metal layer 74 is provided so as to cover the entire third metal layer 73.
- the fourth metal layer 74 is, for example, a gold (Au) film having a thickness of about 0.07 ⁇ m.
- the thickness and material of the first metal layer 71, the second metal layer 72, the third metal layer 73, and the fourth metal layer 74 are examples, and can be arbitrarily changed.
- each of the pair of back surface electrodes 45 and 46 has a base portion 81 and an extension portion 82.
- the base portion 81 is configured to form a rectangular shape.
- the extending portion 82 is configured to extend from the base portion 81.
- the back surface electrodes 45 and 46 have a point-symmetrical shape with reference to the center point CP of the second main surface 42b of the substrate 42.
- the base portion 81 is provided at a substantially central position in the longitudinal direction of the connecting portions 51 and 61 of the comb tooth electrodes 43 and 44.
- the extending portion 82 extends in the same direction as the longitudinal direction of the connecting portions 51 and 61 of the comb tooth electrodes 43 and 44.
- the back surface electrodes 45 and 46 are configured by laminating a plurality of metal layers 91, 92, 93 and 94. That is, the base portion 81 and the extending portion 82 constituting the back surface electrodes 45 and 46 are both configured by laminating a plurality of metal layers 91, 92, 93 and 94.
- the first metal layer 91 which is the lowest layer (the substrate 42 side) of the plurality of metal layers 91, 92, 93, 94, is substantially entirely along the groove 42d formed on the second main surface 42b of the substrate 42. Is provided.
- the groove portion 42d is formed, for example, according to the shape of the back surface electrodes 45 and 46.
- the first metal layer 91 is made of, for example, silver (Ag).
- the second metal layer 92 is provided so as to cover the entire first metal layer 91.
- the second metal layer 92 is, for example, a nickel (Ni) film having a thickness of about 5.0 ⁇ m.
- the third metal layer 93 is provided so as to cover the entire second metal layer 92.
- the third metal layer 93 is, for example, a palladium (Pd) film having a thickness of about 0.15 ⁇ m.
- the fourth metal layer 94 is provided so as to cover the entire third metal layer 93.
- the fourth metal layer 94 is, for example, a gold (Au) film having a thickness of about 0.07 ⁇ m.
- the thickness and material of the first metal layer 91, the second metal layer 92, the third metal layer 93, and the fourth metal layer 94 are examples, and can be arbitrarily changed.
- the back surface electrode 45 configured as described above is electrically connected to the comb tooth electrode 43 by the via hole conductor C1 filled in the via hole V1 provided on the substrate 42. Further, the back surface electrode 46 is electrically connected to the comb tooth electrode 44 by the via hole conductor C2 filled in the via hole V2 provided on the substrate 42.
- the via hole conductors C1 and C2 may be referred to as conductive members or via fillers filled in the via holes V1 and V2 provided on the substrate 42, respectively.
- the via hole conductors C1 and C2 are made of the same type of metal as the first metal layers 71 and 91.
- the comb tooth electrodes 43, 44 and the back surface electrodes 45, 46 can be compressed and molded, and the generation of unnecessary pores in the electrodes 43, 44, 45, 46 can be suppressed, and the electrodes 43 can be suppressed. , 44, 45, 46 can be formed densely.
- the via holes V1 and V2 are through holes that communicate the first main surface 42a and the second main surface 42b of the substrate 42.
- the positions of the via holes V1 and V2 can be read as the positions of the via hole conductors C1 and C2.
- the via holes V1 and V2 are the outer tooth portions 52, 62, 63 located at both ends in the direction in which the tooth portions 52-56 and 62-67 are arranged in the pair of comb tooth electrodes 43 and 44. It is provided at a position corresponding to the tooth portions 53 to 56, 64 to 67 in the region Ar1 surrounded by the connecting portions 51 and 61.
- via holes V1 and V2 are provided at positions corresponding to the tip portion 54a of the inner tooth portion 54 of the comb tooth electrode 43 and the tip portion 67a of the inner tooth portion 67 of the comb tooth electrode 44. Further, the via holes V1 and V2 are provided at positions corresponding to the tip portions of the extending portions 82 of the back surface electrodes 45 and 46 described above. In the example of FIG. 3, the via holes V1 and V2 are connected to the outer tooth portions 52, 62, 63 located at both ends in the direction in which the tooth portions 52-56 and 62-67 are aligned in the pair of comb tooth electrodes 43 and 44. It is not provided in the portions 51 and 61.
- the sensor unit 41 is provided with a protective layer 75 so as to integrally cover the entire comb tooth electrodes 43 and 44 of the first main surface 42a of the substrate 42.
- the protective layer 75 is, for example, a polyimide layer or a polyimide-containing layer, the thickness thereof being about 10 ⁇ m.
- the oscillation circuit unit 101 is, for example, a CR oscillation circuit formed on a circuit board 102.
- the oscillation circuit unit 101 has electrodes 103 and 104, and the electrodes 103 and 104 are electrically connected by contact with the back surface electrodes 45 and 46.
- the oscillation circuit unit 101 outputs an oscillation signal corresponding to the electric signal from the sensor unit 41. Specifically, a transmission signal having a frequency corresponding to the capacitance value between the pair of comb tooth electrodes 43 and 44 is output.
- the oscillation circuit unit 101 is connected to the control circuit unit 111.
- the control circuit unit 111 is arranged in the grip unit 21, for example, and is connected to the oscillation circuit unit 101 by the wiring 112.
- the control circuit unit 111 has a configuration in which a member such as a CPU is mounted on the control circuit board.
- the control circuit unit 111 detects the amount of water to be measured based on the number of pulses of the output signal of the oscillation circuit unit 101. Then, the control circuit unit 111 displays the detected water content on the display unit 22.
- the cover 12 includes a flat bag-shaped cover member 121 and a support member 122 attached to the cover member 121.
- the cover member 121 and the support member 122 are made of a transparent or translucent resin.
- the cover 12 is attached so that the cover member 121 covers the sensor portion 41 at the tip of the probe portion 31.
- the cover member 121 prevents the tip of the probe portion 31, particularly the measurement target, from directly touching the sensor portion 41.
- the amount of water in the oral cavity is measured by pressing the sensor unit 41 against the oral cavity (for example, the tongue) to be measured while the user holds the grip portion 21. ..
- via holes V1 and V2 are set in the region Ar1 on the substrate 42, and via hole conductors C1 and C2 are filled in the via holes V1 and V2. That is, the via holes V1 and V2 are set relatively close to the center of the substrate 42.
- the positions of the via hole conductors C1 and C2 are set at the connecting portions 51 and 61 and the cases where the positions are set at the outer tooth portions 52, 62 and 63.
- the external force acting on the 44 can be relaxed from the via hole conductors C1 and C2.
- the via hole conductors C1 and C2 in the region Ar1, the length of the extending portion 82 of the back surface electrodes 45 and 46 can be shortened, and the parasitic capacitance due to the length of the extending portion 82 can be reduced. ..
- the cover 12 air is included between the cover 12 and the sensor unit 41, so that the cover 12 is wrinkled or twisted, and measurement variation is likely to occur.
- the air content between the cover 12 and the sensor unit 41 can be suppressed, and the occurrence of wrinkles and twists in the cover 12 can be suppressed. Measurement variation can be suppressed.
- the adhesion strength between the electrodes 43, 44, 45, 46 and the substrate 42 is increased, and interfacial peeling can be suppressed. Therefore, the back surface electrodes 45, 46 and the oscillation circuit portion can be suppressed. 101 can be directly joined. Therefore, it is possible to suppress the variation in the measured value due to the variation in the parasitic capacitance of the wiring (the variation in the distance between the wirings and the wiring length at the time of product assembly or measurement) due to the omission of the wiring. Further, the sensitivity of the sensor unit 41 is improved by eliminating the parasitic capacitance of the wiring. Further, since the sensor unit 41 and the oscillation circuit unit 101 can be arranged close to each other, the head unit 32 can be miniaturized (thinned) and easily introduced into the oral cavity.
- the comb tooth electrodes 43 and 44 and the back surface electrodes 45 and 46 can be compressed and formed. Therefore, it is possible to suppress the generation of unnecessary pores at the electrodes 43, 44, 45, 46, and the electrodes can be formed densely. As a result, it is possible to prevent moisture from entering the interface between the first metal layers 71 and 91 and the via hole conductors C1 and C2. Further, since the via holes V1 and V2 are filled with the via hole conductors C1 and C2, it is possible to prevent water from entering the via holes V1 and V2.
- a short circuit occurs between the back surface electrode 45 and the back surface electrode 46, a short circuit occurs in the circuit board 102 of the oscillation circuit unit 101, and as an oral moisture meter accompanying the short circuit. It is possible to reduce the deterioration and loss of the function and abnormal heat generation. In addition, it is possible to suppress elution and leakage of metal due to accumulated water (for example, saliva) and infection associated with saliva accumulation.
- the via holes V1 and V2 are provided at positions corresponding to the tip portions of the extending portions 82 of the back surface electrodes 45 and 46, so that the base portions 81 of the back surface electrodes 45 and 46 are soldered.
- the stress applied to the soldered portion can be made difficult to be transmitted to the via holes V1 and V2.
- the measuring instrument 10 of this reference example has a sensor unit 131 and an oscillation circuit unit 101, as in the first embodiment.
- the sensor unit 131 has a pair of comb tooth electrodes 43 and 44 provided on the first main surface 42a of the substrate 42, and back electrode 45 and 46 provided on the second main surface 42b of the substrate 42.
- the sensor unit 131 has a wall portion 132 that surrounds the pair of comb tooth electrodes 43 and 44 on the first main surface 42a of the substrate 42. Similar to the comb tooth electrodes 43 and 44, the wall portion 132 is formed by laminating a plurality of metal layers 133, 134, 135 and 136. That is, the wall portion 132 has the same structure as the pair of comb tooth electrodes 43 and 44.
- the first metal layer 133 which is the lowest layer (on the substrate 42 side) of the plurality of metal layers 133, 134, 135, and 136, is provided substantially entirely along the groove 42e formed on the substrate 42.
- the groove portion 42e is formed in a square frame shape, for example, according to the shape of the wall portion 132.
- the first metal layer 133 is composed of, for example, silver (Ag).
- the second metal layer 134 is provided so as to cover the entire first metal layer 133.
- the second metal layer 134 is, for example, a nickel (Ni) film having a thickness of about 5.0 ⁇ m.
- the third metal layer 135 is provided so as to cover the entire second metal layer 134.
- the third metal layer 135 is, for example, a palladium (Pd) film having a thickness of about 0.15 ⁇ m.
- the fourth metal layer 136 is provided so as to cover the entire third metal layer 135.
- the fourth metal layer 136 is, for example, a gold (Au) film having a thickness of about 0.07 ⁇ m.
- the thickness and material of the first metal layer 133, the second metal layer 134, the third metal layer 135, and the fourth metal layer 136 are examples, and can be arbitrarily changed.
- the protrusion length of the wall portion 132 from the first main surface 42a is substantially equal to the protrusion length of the comb tooth electrodes 43 and 44 from the first main surface 42a.
- the via holes V1 and V2 are through holes that communicate the first main surface 42a and the second main surface 42b of the substrate 42.
- the via holes V1 and V2 are provided at positions corresponding to the tooth portions 52 to 56 and 62 to 67 in the region Ar2 surrounded by the wall portion 132.
- the via holes V1 are located at positions corresponding to the tip portion 54a of the inner tooth portion 54 of the comb tooth electrode 43 and the tip portion 67a of the inner tooth portion 67 of the comb tooth electrode 44.
- V2 is provided.
- the via holes V1 and V2 are provided at positions corresponding to the tip portions of the extending portions 82 of the back surface electrodes 45 and 46 described above.
- the sensor portion 131 is provided with a protective layer 137 so as to integrally cover the entire comb tooth electrodes 43 and 44 and the entire wall portion 132 of the first main surface 42a of the substrate 42.
- the protective layer 137 is, for example, a polyimide layer or a polyimide-containing layer, the thickness thereof being about 10 ⁇ m.
- the amount of water in the oral cavity is measured by pressing the sensor unit 131 against the oral cavity (for example, the tongue) to be measured while the user grips the grip portion 21. ..
- via holes V1 and V2 are set at positions corresponding to the tooth portions 52 to 56 and 62 to 67 in the region Ar2 surrounded by the wall portion 132 on the substrate 42, and the via holes V1 and V2 are included. Is filled with via hole conductors C1 and C2. That is, the via holes V1 and V2 are set relatively close to the center of the substrate 42.
- the wall portion 132 has the same structure as the pair of comb tooth electrodes 43 and 44, the wall portion 132 can be formed by the same method and at the same timing as the comb tooth electrodes 43 and 44. That is, it is possible to suppress an increase in the number of steps as compared with the case where the wall portion is separately formed.
- the step on the surface of the protective layer 137 is formed. It can be suppressed by the wall portion 132 and the comb tooth electrodes 43 and 44.
- the tooth portions 52 to 56 of the comb tooth electrode 43 are 5 and the tooth portions 62 to 67 of the comb tooth electrode 44 are 6, but the number of these may be changed as appropriate. ..
- the number of teeth of the comb electrode 43 and the number of teeth of the comb electrode 44 may be the same.
- the surface of the first metal layer 71 of the comb tooth electrodes 43 and 44 and the first main surface 42a of the substrate 42 are substantially flush with each other, but the present invention is not limited to this.
- a configuration may be adopted in which a part of the first metal layer 71 protrudes from the first main surface 42a of the substrate 42, and a part of the first metal layer 71 is embedded in the substrate 42.
- a configuration may be adopted in which all of the first metal layer 71 is arranged on the first main surface 42a of the first substrate 42.
- the base portion 81 is provided at a substantially central position in the longitudinal direction of the connecting portions 51 and 61 of the substrate 42, but the present invention is not limited to this. As shown in FIG. 6, the base portion 81 may be provided at a position deviated from the substantially center position in the longitudinal direction of the connecting portions 51 and 61 of the substrate 42. In this way, the position of the base portion 81 can be changed as appropriate.
- the wall portion 132 and the comb tooth electrodes 43 and 44 have the same structure, but the wall portion 132 and the comb tooth electrodes 43 and 44 may have different structures.
- the protruding length of the wall portion 132 from the first main surface 42a is substantially the same as the protruding length of the comb tooth electrodes 43 and 44 from the first main surface 42a, but they may be different.
- the sensor unit 141 may include a wall unit 142 on the second main surface 42b side.
- the wall portion 142 shown in FIG. 9 has the same structure as the wall portion 132.
- the protective layers 75 and 137 have a structure thinner than the thickness of the substrate 42. By adopting such a configuration, the sensitivity of the sensor unit 41 can be increased.
- the protective layers 75 and 137 are made of polyimide, but the present invention is not limited to this.
- it may be made of the same material as the substrate 42, and the relative permittivity of the protective layers 75 and 137 may be equal to or higher than the relative permittivity of the substrate 42.
- An example of the same material as the substrate 42 is, for example, a mixture of glass and ceramics.
- the protective layer is a mixture of glass and ceramics
- oxidation of the comb tooth electrodes 43 and 44 can be suppressed by covering the comb tooth electrodes 43 and 44.
- the protective layer and the substrate 42 can be brought into close contact with each other, and moisture can be suppressed from entering from the interface between the protective layer and the substrate 42. Can be done.
- the electrodes 103 and 104 of the oscillation circuit unit 101 and the back surface electrodes 45 and 46 may be connected by conductors 151 and 152 which can be wiring.
- the configuration shown in FIG. 10 is shown as a base of the modification shown in FIG. 9, the first embodiment and the reference example may be used as a base.
- the comb tooth electrodes 43 and 44 are configured by laminating a plurality of metal layers 71, 72, 73 and 74, but as shown in FIG. 11, a single metal layer (conductor layer). Only the comb tooth electrodes 43 and 44 may be configured.
- the substrates 162 are laminated so as to cover the comb tooth electrodes 43 and 44.
- the substrate 162 preferably has a relative permittivity equal to or higher than the relative permittivity of the substrate 42, for example.
- a configuration in which the resin member 163 is laminated on the substrate 162 may be adopted.
- the rigidity can be increased.
- via holes V1 and V2 shown in the above embodiment and the reference example are examples, and may be appropriately changed in the regions Ar1 and Ar2.
- via holes V1 and V2 may be provided directly under the connecting portions 51 and 61, for example.
- the via hole V1 may be provided directly below the branch point with the tooth portion 56 in the connecting portion 51, and the via hole V2 may be provided directly below the branch point with the tooth portion 65 in the connecting portion 61.
- the via hole V1 may be provided directly below the branch point with the outer tooth portion 52 in the connecting portion 51, and the via hole V2 may be provided directly below the branch point with the outer tooth portion 63 in the connecting portion 61.
- the back surface electrodes 45 and 46 are composed of a rectangular base portion 81 and an extending portion 82 extending from the base portion 81, but the present invention is not limited to this.
- the pair of back surface electrodes 181, 182 may have a rectangular shape. That is, the extension portions 82 of the back surface electrodes 45 and 46 in the above embodiment and the reference example may be omitted.
- the back surface electrodes 181, 182 are similar to those in which the base portions 81 of the back surface electrodes 45, 46 of the above embodiment and the reference example are rotated by 90 ° about the center point CP. Therefore, the via holes V1 and V2 located directly below the back surface electrodes 181, 182 are also changed as compared with the above-described embodiment and reference example.
- the via hole V1 of this example is provided at an intermediate position in the longitudinal direction (for example, a central position in the longitudinal direction) of the tooth portion 54.
- the via hole V2 of this example is provided at an intermediate position in the longitudinal direction (for example, a substantially central position in the longitudinal direction) of the tooth portion 67.
- the back surface electrodes 45 and 46 may be square as in the back surface electrodes 181 and 182 in FIG. 15, but may be rectangular as in the back surface electrodes 191 and 192 shown in FIG. You may.
- wiring can be used as conductors 151 and 152 for connecting the substrate 42 and the circuit board 102.
- two wires for connecting the backside electrodes 45 and 46 and the oscillation circuit unit 101 are used.
- the wirings (conductors 151, 152) are arranged at equal distances (that is, equal lengths) and at equal angles (for example, symmetrical postures).
- two wirings (conductors 151 and 151) connecting the back surface electrodes 45 and 46 and the oscillation circuit unit 101 while separating the two via hole conductors C1 and C2 from each other as much as possible. 152) can be installed at equal distances (that is, equal lengths) and at close angles (for example, symmetrical postures), which is advantageous in improving the degree of design freedom.
- the back electrode 45 and the back electrode 46 have a point-symmetrical shape centered on the center point CP, but the shape is not limited to this.
- the back surface electrode 191 and the back surface electrode 192 may be configured so as to have line symmetry about the reference line BL virtually set on the second main surface 42b of the substrate 42.
- the back surface electrode By configuring the 191 and the back electrode 192 to be line-symmetrical with respect to the reference line BL as described above, the external force acting on the back electrodes 191, 192 via the comb tooth electrodes 43 and 44 is applied. Can be evenly distributed.
- the via hole V1 arranged directly below the back surface electrode 191 is provided at a position corresponding to the tip portion 55a of the tooth portion 55 of the comb tooth electrode 43.
- the via hole V2 arranged directly below the back surface electrode 192 is provided at a position corresponding to the tip portion 67a of the tooth portion 67 of the comb tooth electrode 44.
- the via holes V1 and V2 do not have to be arranged at positions that are line-symmetrical with respect to the reference line BL.
- the base portion 201a of the back electrode 201 and the base portion 202a of the back electrode 202 have a point-symmetrical shape with respect to the center point CP, and the extension portion 201b of the back electrode 201 and the back electrode 202.
- the extending portion 202b of the above may have a non-point symmetric shape. More specifically, the extension length of the extension portion 201b of the back surface electrode 201 and the extension length of the extension portion 202b of the back surface electrode 202 are made different. Further, the extending direction of the extending portion 201b of the back surface electrode 201 and the extending direction of the extending portion 202b of the back surface electrode 202 are set to be the same direction.
- the beer hole V1 arranged directly below the back surface electrode 201 is provided at a position corresponding to the tip end portion 54a of the tooth portion 54 of the comb tooth electrode 43.
- the via hole V2 arranged directly below the back surface electrode 202 is provided at a position corresponding to the tip end portion 64a of the tooth portion 64 of the comb tooth electrode 44.
- the via holes V1 and V2 may not be arranged at positions that are point-symmetrical with respect to the center point CP.
- the distance between the end of the outer tooth portion 52 and the end of the outer tooth portion 62 may be appropriately changed.
- the distance between the end of the outer tooth portion 52 and the end of the outer tooth portion 62 may be larger than that of the above-described embodiment and reference example.
- the extension direction of the extension portion 82 of the back surface electrodes 45 and 46 is configured to be along the longitudinal direction of the connection portions 51 and 61 of the comb tooth electrodes 43 and 44.
- the extending direction of 82 may be a direction intersecting the longitudinal direction of the connecting portions 51 and 61.
- the extension direction of the extension portion 82 is along a direction orthogonal to the longitudinal direction of the connection portions 51, 61 of the comb tooth electrodes 43, 44 (extension direction of the tooth portions 52 to 56, 62 to 67).
- the configuration can be adopted.
- the longitudinal direction of the main body 11 and the longitudinal direction of the connecting portions 51 and 61 of the comb tooth electrodes 43 and 44 are configured to substantially match, but the longitudinal direction of the main body 11 and the comb tooth electrode 43 are configured. , 44 may be configured to intersect the longitudinal direction of the connecting portions 51, 61.
- the oscillation circuit unit 101 is provided in the head unit 32 of the probe unit 31, but the position of the oscillation circuit unit 101 may be changed as appropriate. That is, a configuration may be adopted in which the arm portion 33 of the probe portion 31 and the oscillation circuit portion 101 are provided in the grip portion 21.
- the oscillation circuit unit 101 and the control circuit unit 111 are separately configured, but the oscillation circuit unit 101 and the control circuit unit 111 may be formed on, for example, the same substrate.
- the wall portion 50 can receive an external force acting on the comb tooth electrodes 43 and 44 and acts on the comb tooth electrodes 43 and 44. External force can be reduced.
- the level of the top of the wall 50 and / or the protruding height of the wall 50 from the first main surface 42a can be determined so that the external force acting on the comb electrode 43, 44 can be reduced.
- the level of the top of the wall portion 50 may match the level of the top of the comb tooth electrodes 43 and 44, and the protruding height of the wall portion 50 from the first main surface 42a is from the first main surface 42a. It may be the same as the protruding height of the comb tooth electrodes 43 and 44.
- the wall portion 50 may have the same structure as the wall portion 132 of the reference example, and may be changed as in various modification examples of the reference example.
- the via hole conductors C1 and C2 are provided at both ends in the direction in which the tooth portions 52-56 and 62-67 are aligned inside the wall portion 50 and within the pair of comb tooth electrodes 43 and 44.
- the via hole conductors C1 and C2 are formed on the tip portions of one or more tooth portions in the region Ar1 (for example, the tip portions 54a and 67a in FIGS. 3 and 21, the tip portions 55a and 67a in FIG. 18, and the tip portions 54a in FIG. When arranged in 64a), the distance between the via hole conductors C1 and C2 can be increased, and even when stress is applied to the via hole conductors C1 and C2, the stress applied to the entire substrate 42 can be dispersed.
- the wall portions 132 and 142 are both conductive. May have.
- a via hole conductor that electrically connects the wall portion 132 and the wall portion 142 may be provided on the substrate 42.
- the wall portions 132 and 142 are both conductive, and the wall portion 132 and the wall portion 142 are electrically connected by a via hole conductor C3 provided on the substrate 42. ..
- the wall portion 142 of the second main surface 42b is connected to the ground electrode 105 provided on the circuit board 102 by a conductor 153.
- the conductor 153 may be, for example, wiring.
- the conductors 151, 152, and 153 are omitted, and the back surface electrodes 45, 46 and the wall portion 142 of the second main surface 42b are soldered to the electrodes 103, 104 and the ground electrode 105 of the oscillation circuit unit 101, respectively. It may be joined via the above, or it may be directly contacted with the electrodes 103 and 104 of the oscillation circuit unit 101 and the ground electrode 105, respectively.
- the measuring device for measuring the water content in the oral cavity has been described, but the water content may be measured outside the oral cavity. Further, the cover 12 is not essential, and the sensor unit 41 may be directly pressed against the object to be measured to measure the water content.
- measuring instruments for measuring the amount of water
- other measuring instruments may be used.
- it may be a measuring device such as a pH measuring device or an oral bacteria measuring device. It may also be used as a measuring device for measuring blood flow and blood oxygen. Further, it may be a measuring instrument for measuring a plurality of types of measured values.
- This disclosure includes the following configuration examples.
- a substrate having a first main surface and a second main surface, a pair of comb tooth electrodes provided on the first main surface, and a pair of comb tooth electrodes provided on the second main surface.
- a sensor unit having a pair of backside electrodes corresponding to each is provided.
- the sensor unit further has a wall portion on the first main surface that protrudes from the first main surface and surrounds the pair of comb tooth electrodes.
- the substrate has via holes at positions corresponding to the teeth in the area surrounded by the wall.
- a measuring instrument having a conductive member in the via hole that connects the comb tooth electrode and the back surface electrode.
- the wall portion provided on the first main surface surrounds the circumference of the pair of comb tooth electrodes, the wall portion can receive the external force acting on the comb tooth electrodes, and the sensor portion can receive the external force. Damage can be reduced.
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Abstract
Description
図1に示すように、測定器10は、本体11と、本体11に取り付けられるカバー12とを有する。この測定器10は、測定対象として例えば口腔内の水分量を測定する口腔内水分測定器である。
次に、参考例を説明する。なお、参考例において、第1実施形態と同様の部材については第1実施形態と同じ符号を用い、その説明の一部又は全てを割愛する。
なお、上記実施形態及び参考例は、以下のように変更して実施することができる。上記実施形態及び参考例及び以下の変更例は、技術的に矛盾しない範囲で互いに組み合わせて実施することができる。
前記センサ部は、前記第1主面に、該第1主面よりも突出するとともに前記一対の櫛歯電極の周囲を囲む壁部を更に有し、
前記基板は、前記壁部に囲まれた領域内の歯部に対応する位置にビアホールを有し、
前記ビアホール内には前記櫛歯電極と前記裏面電極とを接続する導電部材を有する、測定器。
Claims (7)
- 第1主面及び第2主面を有する基板と、前記第1主面に設けられる一対の櫛歯電極と、前記第2主面に設けられるとともに前記一対の櫛歯電極にそれぞれ対応する一対の裏面電極と、を有するセンサ部を備え、
前記一対の櫛歯電極のそれぞれは、複数の歯部と、該歯部同士を接続する接続部とを有し、
前記基板は前記一対の櫛歯電極の内で前記複数の歯部の並ぶ方向において両端に位置する歯部と前記一対の櫛歯電極の前記接続部とで囲まれた領域内の歯部に対応する位置にビアホール導体を有し、
前記ビアホール導体は前記櫛歯電極と前記裏面電極とを接続する、測定器。 - 前記センサ部は、前記第1主面に、該第1主面よりも突出するとともに前記一対の櫛歯電極の周囲を囲む壁部を更に有する、請求項1に記載の測定器。
- 前記ビアホール導体は、前記領域内の前記歯部の先端部に配置される、請求項1または請求項2に記載の測定器。
- 前記一対の裏面電極は、点対称形状である、請求項1から請求項3の何れか1項に記載の測定器。
- 前記一対の裏面電極は長方形である、請求項1から請求項4の何れか1項に記載の測定器。
- 前記一対の裏面電極はベース部と延出部とを備え、前記ビアホール導体は前記一対の裏面電極の前記延出部に接続されている、請求項1から請求項4の何れか1項に記載の測定器。
- 前記壁部は、前記一対の櫛歯電極と同一の構造である、請求項2から請求項5の何れか1項に記載の測定器。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202080041451.3A CN113994175B (zh) | 2019-06-07 | 2020-06-02 | 测定器 |
| JP2021524843A JP7156524B2 (ja) | 2019-06-07 | 2020-06-02 | 測定器 |
| US17/538,179 US11980455B2 (en) | 2019-06-07 | 2021-11-30 | Measuring device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-106731 | 2019-06-07 | ||
| JP2019106731 | 2019-06-07 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US17/538,179 Continuation US11980455B2 (en) | 2019-06-07 | 2021-11-30 | Measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2020246444A1 true WO2020246444A1 (ja) | 2020-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/JP2020/021677 Ceased WO2020246444A1 (ja) | 2019-06-07 | 2020-06-02 | 測定器 |
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| Country | Link |
|---|---|
| US (1) | US11980455B2 (ja) |
| JP (1) | JP7156524B2 (ja) |
| CN (1) | CN113994175B (ja) |
| WO (1) | WO2020246444A1 (ja) |
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- 2020-06-02 CN CN202080041451.3A patent/CN113994175B/zh active Active
- 2020-06-02 WO PCT/JP2020/021677 patent/WO2020246444A1/ja not_active Ceased
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2021
- 2021-11-30 US US17/538,179 patent/US11980455B2/en active Active
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| Publication number | Publication date |
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| JP7156524B2 (ja) | 2022-10-19 |
| CN113994175B (zh) | 2025-03-14 |
| CN113994175A (zh) | 2022-01-28 |
| US20220087567A1 (en) | 2022-03-24 |
| US11980455B2 (en) | 2024-05-14 |
| JPWO2020246444A1 (ja) | 2020-12-10 |
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