WO2004025274A1 - マイクロ質量センサとその発振子の保持機構 - Google Patents
マイクロ質量センサとその発振子の保持機構 Download PDFInfo
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- WO2004025274A1 WO2004025274A1 PCT/JP2003/011464 JP0311464W WO2004025274A1 WO 2004025274 A1 WO2004025274 A1 WO 2004025274A1 JP 0311464 W JP0311464 W JP 0311464W WO 2004025274 A1 WO2004025274 A1 WO 2004025274A1
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- Prior art keywords
- oscillator
- crystal oscillator
- quartz
- holding frame
- etching
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
- H03H9/17—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator
- H03H9/177—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator of the energy-trap type
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
- H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
- H03H3/02—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/0504—Holders; Supports for bulk acoustic wave devices
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
- H03H9/17—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator
- H03H9/171—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator implemented with thin-film techniques, i.e. of the film bulk acoustic resonator [FBAR] type
- H03H9/172—Means for mounting on a substrate, i.e. means constituting the material interface confining the waves to a volume
- H03H9/173—Air-gaps
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
- H03H9/17—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator
- H03H9/19—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator consisting of quartz
Definitions
- the present invention relates to a durable, compact mass sensor capable of measuring a specific chemical substance in an aqueous solution or the atmosphere with high sensitivity, high accuracy, and high stability.
- Non-Patent Document 1 reports that it is based on the principle that when the substance is adsorbed on the electrode provided on the quartz surface, the oscillation frequency of the quartz oscillator is reduced by its mass, and the change of the frequency is Is proportional to the square of the fundamental frequency (hereinafter referred to as “frequency”) and is reported to be inversely proportional to the electrode area.
- N f ⁇ d
- the first to be put into practical use based on the above principle is a sensor for measuring the film thickness of thin films such as vacuum evaporation, and the quartz oscillator has a diameter of 14 mm and a fundamental frequency of about 6 MHz. .
- various sensors are put to practical use in many fields, for example, selective recognition molecules having affinities specific to various gas species are coated on electrodes provided on the surface of a quartz oscillator, and the mass is absorbed by adsorption of individual gases. Some measure the increase.
- Non-Patent Document 3 As a method for increasing the sensitivity to a high frequency of 30 MHz or higher, the method of thinning the center of the vibrating portion by double-sided chemical etching is reported by Non-Patent Document 3 and Non-Patent Document 4, but According to the results, high sensitivity is obtained, but the flatness of the vibrating surface (etched surface) of the quartz oscillator ⁇ The decrease in the oscillation intensity due to the decrease in parallelism on both surfaces, and multiple vibrating surfaces are formed on the entire vibrating surface Since the amount of noise increases and the resonance characteristics deteriorate due to the occurrence of split vibration, there are problems such as low accuracy and the inability to obtain stable resonance characteristics (explained in Comparative Example 3 below and explained) ).
- the biosensor since the biosensor is required to have high sensitivity, the frequency must be increased, and as the frequency becomes higher, generation and leakage of electromagnetic waves may increase, which may make frequency measurement impossible.
- Patent Document 1 discloses a method of fixing a quartz oscillator as a fixed insulation method, according to which a peripheral edge of a quartz oscillator having a diameter of 8 mm and a thickness of 1 4 7.5 m (1 1.3 2 MH z) The electrode is fixed to the chamber made of acrylic resin with an adhesive, and the electrode on one side of the oscillator is covered to improve the structure not to contact with the liquid.
- Patent Document 2 a structure in which the outer peripheral one surface of a crystal oscillator having a diameter of 1 1-2 2 mm and a thickness of 6 1 7 (2 7 ⁇ 2) is sealed with an adhesive and a plastic plate so as not to contact with liquid. It is making.
- Patent Document 3 although a 27 MHz crystal oscillator is covered with silicon rubber at its peripheral portion to shield and insulate one side of an electrode from an aqueous solution, two leads in which a vibrating crystal oscillator is exposed on the back side It employs a structure in which the wire is contact-bonded.
- the parallelism of the two lead wires and the flatness (flatness) of the holding frame are not sufficient, and the periphery from the outer surface of the crystal unit is fixed to the holding frame with an adhesive.
- Patent Document 1
- Patent Document 2
- Another object of the present invention is to provide a more durable and durable mass sensor with enhanced resonance characteristics by enhancing the fixability of the crystal oscillator of the crystal oscillator holding frame, the flatness of the holding frame, and the insulation of the entire holding frame. Do.
- Another object of the present invention is to provide a quartz oscillator holding frame which can be easily embedded with a conductive rod and has good sealing performance, and which has high mass productivity. Disclosure of the invention
- a quartz oscillator in which the central portion of the quartz plate is dug into a truncated cone shape, That is, the vertical cross section is dug down into a trapezoidal trapezoidal shape (hereinafter referred to as "mesa J").
- mea J trapezoidal trapezoidal shape
- Fig. 2 quartz oscillator with a different shape (hereinafter referred to as "inverted mesa type").
- a quartz crystal oscillator with a lens shape is used, in which the central portion is thickened by processing into an inverted mesa shape and then polishing.
- FIG. 1 is a plan view of a mass sensor incorporating a round quartz oscillator.
- FIG. 2 is a cross-sectional view taken along arrow A-A of FIG. 1, and is a cross-sectional view of the crystal oscillator portion when the crystal oscillator is fixed;
- FIG. 3 is a cross-sectional view of FIG.
- FIG. 7 is a sectional view taken along arrow B, which is a longitudinal sectional view of a mass sensor to which a quartz oscillator is fixed.
- FIG. 4 is a plan view of a mass sensor incorporating a square crystal oscillator.
- FIG. 5 is a diagram showing resonance characteristics after dry etching in Example 1.
- FIG. 6 is a diagram showing the resonance characteristics after dry etching / wet etching and finish polishing of Example 1
- FIG. 7 is a diagram showing the resonance characteristics after dry etching & wet etching and finish polishing of Example 2.
- FIG. 8 is a view showing a resonance characteristic after dry etching, wet etching, and finish polishing in Example 3.
- FIG. 9 is a view showing resonance characteristics after dry etching / wet etching / finishing polishing of Example 4.
- FIG. 10 shows the crystal oscillator holding frame before folding using the integrally formed membrane type envelope. It is a top view.
- FIG. 11 is a cross-sectional view taken along the line C--C in FIG. 10, in which the surface member and the back member of the membrane type shell are bent and sealed tightly, and the crystal oscillator is fixed when the crystal oscillator is fixed.
- FIG. 12 is a cross-sectional view taken along the line D-D in FIG. 10, and is a cross-sectional view of the hermetic seal portion when the front member and the back member are sealed and fixed.
- a conductive rod holding frame 2 3 is a holding mechanism for welding conductive rods 22 onto hermetic seal pins 21 using solder or the like, and maintaining the spacing and flatness of the conductive rods relative to each other. ⁇ Fit two fours.
- a recess (FIG. 2) is provided in the portion of the crystal oscillator holding frame in which the crystal oscillator is embedded.
- the portion of the conductive rod of the concave portion in contact with the front electrode 15 'and the back electrode 17' of the crystal oscillator 10 is molded so as to be exposed (FIG. 2), but after polishing the contact portion, A conductive paste (not shown) is applied, and the inverted mesa 12 of the quartz oscillator is placed on the quartz oscillator holding frame side and fitted in the recess.
- the frame 13 of the quartz oscillator is supported by the step of the recess.
- the convex lens-like part 11 is on the release side.
- the crystal oscillator outer diameter part is adhered and fixed with a silicone rubber adhesive and the adhesion seal part 1
- silicone rubber compounds In addition to silicone rubber compounds, polyurethane compounds, unsaturated polyester compounds, ethylene-propylene elastomers, rubbers, etc. may be used as the molding agent.
- the holding mechanism for maintaining the flatness of the crystal oscillator holding frame uses a holding frame provided with holes or apertures as shown in Fig. 1 etc. However, in order to further enhance the flatness ⁇ rigidity, it is inclined.
- a holding frame may be provided.
- FIG. 4 shows the case where a square crystal oscillator is incorporated into a crystal oscillator holding frame.
- the oscillator is made to have a predetermined thickness and a predetermined vibration characteristic in the following steps.
- N 1 6 7 0 MH z ⁇ rn for AT cut and a thickness of 2 7. 8 3 m for BT cut.
- N 2 5 7 O MH z ⁇ nm, the thickness is 4 2. 8 3 m, and it is clear that the BT cut is easier to process from the viewpoint of processing.
- the oscillation element in which both sides of the parallel plate quartz plate are precisely polished and parallel-sliced and mirror-finished for high frequency, has excellent oscillation characteristics by itself, but the strength is weak with the thinning. Therefore, it becomes difficult to stably fix the outer peripheral portion of the vibrating portion of the quartz oscillator, and the resonance characteristics are easily deteriorated due to the decrease in the oscillation intensity and the contact failure of the electrode by fixing the periphery of the oscillating oscillator.
- the etching process is adopted for processing to the reverse mesa type, and the dry etching method and the wet etching method are used.
- the etching process differs from the mechanical polishing process, in dry etching the crystal structure of the etched surface is broken (force 11 degradation), and in the wet etching, pits and etch channels are easily generated on the etching surface, and the surface is roughened. Since these defects easily generate harmonic components due to split vibration and cause deterioration of resonance characteristics, optimization of etching processes such as selection and combination of etching processing conditions is essential.
- RIE method reactive ion etching method
- LA method laser ablation method
- CIB method cluster ion beam method
- Dry etching is isotropic in the etching direction, and the amount of etching changes with the magnitude of high frequency power and gas concentration * flow rate added during processing, so it is easy to control the etching.
- a quartz oscillator material is masked with a metal mask and / or photoresist, and the portion other than the masked portion is etched to a predetermined thickness.
- the wet etch process is performed by immersing the crystal oscillator material masked in the heated hydrofluoric acid aqueous solution.
- the etching amount corresponds to the concentration of hydrofluoric acid.
- wet etching is anisotropic, and deep etching tends to cause surface defects, so it is preferable to keep it to 5 m or less.
- the isotropic dry etching having a large etching amount is used first for the quartz oscillator material, and the thickness corresponding to the target frequency determined by the above-mentioned constant N is obtained.
- Etch to 1. 1 to 1 I 2 times so as to reduce defects on the crystal surface by etching by 1. 3 to 1. 4 times, then reducing the high frequency power and increasing the concentration of active gas.
- a strong two-step dry etching process is performed. However, weak or strong dry etching may be performed. Next, it is immersed in a hydrofluoric acid aqueous solution as described above to perform wet etching.
- the portion processed into the reverse mesa shape can not receive the pressing by the etching surface, and this portion is a circular plate which is just fixed peripherally in terms of machining dynamics. Will receive the processing load of distributed load from one side.
- the processing load decreases toward the central part of the inverted mesa processing part in the inverted mesa processing part, the amount of polishing processing decreases, and the central part of the inverse mesa processing part becomes thicker. It will be finished, and the processing load will be released after processing, and the opposite side of the reverse mesa will be raised in a convex lens shape.
- the vibrating reed finished in the shape of a convex lens like the speaker for acoustics, reduces the divided vibration, prevents the generation of harmonic components due to the divided vibration, and becomes an oscillator with good resonance characteristics.
- a deposited film having a diameter of about 1/2 of that of the reverse mesa portion is formed on the front and back of the quartz oscillator to produce a front electrode 15, a back electrode 17.
- a holding mechanism is provided to maintain the flatness of the crystal oscillator holding frame in order to ensure the parallelism of the intervals of the conductive rods and to prevent the warping and tilting of the crystal oscillator, and to enhance the rigidity of the frame.
- Generation of conductive defects in conductive parts ⁇ The generation of electromagnetic waves was prevented, and the sealability of the electrical system was further enhanced, and the effects of electromagnetic wave leakage and the conductivity of the aqueous solution were eliminated as much as possible.
- the diameter of the conductive bar etc. is taken into consideration for the molding die. Ru.
- a crystal oscillator holding frame will be described, in which a conductive foil coating is applied to the membrane type envelope as necessary using an integrally molded foldable membrane type envelope, and the conductive rod is embedded and sealed tightly.
- the membrane type outer cover consisting of the front surface member 31 and the back surface member 36 is integrally molded using a mold or the like.
- the surface member is provided with a ⁇ protrusion 32 and the back member is provided with a recess 37.
- a recess corresponding to the shape of the hermetic seal is processed.
- an opening 33 for holding a crystal oscillator is provided in the front surface member, and a depression 38 is provided in the crystal oscillator holding portion, as necessary, in the back surface member.
- FIG. 10 separately shows the case where the conductive bar and the conductive foil are used as the terminals in contact with the metal vapor-deposited film of the quartz oscillator, it is not necessary to use in combination, either one may be used.
- processing of the conductive foil 44 is performed on the back surface member using a printing technique or the like. Also, processing of the conductive foil 45 may be applied to the surface member in order to secure better conductivity.
- the end of the conductive foil and the end of the conductive rod 43 are brought into contact and conducted. At that time, it is effective to apply a silver paste or the like.
- the conductive foil and the conductive bar may be connected by bonding using a metal wire.
- FIG. 11 shows a cross section when the crystal oscillator is fixed to the opening 33 after the front and back members are bent and sealed tightly.
- FIG. 12 shows a cross section of the hermetic seal when the front and back members are sealed and fixed.
- the method of fixing and sealing the crystal oscillator on the crystal oscillator holding frame is the same as the method described above.
- 11 For the membrane type envelope material, crystallized polyethylene terephthalate, polybutylene terephthalate, polysulfone, polyether sulfone, polyacetal, polyphenylene oxide, polyphenol sulfate, etc. are used.
- the quartz crystal pieces of AT gauze are polished to a thickness of 60 m and then processed to a diameter of 6. O mm and further precision polished to a thickness of 50 ⁇ m to a fundamental frequency of 33.40 MH z ⁇ oscillation strength of 40 to 40 mm A 50 dB crystal oscillator was obtained.
- wet etching has an effect of increasing the frequency due to thinning, it is more effective to remove processing degradation of the surface caused by dry etching and to reduce division vibration.
- the oscillation intensity decreases and causes deterioration of the resonance characteristics.
- this crystal oscillator is attached to the crystal oscillator holding frame shown in FIGS. 1 to 3 to make a final product, and this mass sensor is immersed in water maintained at 25 ⁇ 0.1 ° C., and after 20 minutes As a result of measuring the resonance characteristics, 100% of mass sensors with sharp resonance characteristics around the fundamental frequency of 52 MHz were obtained (100% yield).
- a quartz crystal of B T power is used, and the diameter of the crystal oscillator is set to 7 of the first embodiment.
- the example is miniaturized to 5% and manufactured according to the invention.
- the quartz cut pieces of BT cut are polished to a thickness of 50 ⁇ and then processed to a diameter of 4.5 mm.
- a quartz oscillator with 5 MHz-oscillation strength of 40 to 50 dB was obtained.
- finish polishing was performed to obtain a convex lens-shaped inverse mesa type quartz crystal oscillator having a fundamental frequency of 144.25 to 144.70 and an oscillation intensity of 40 to 50 dB and no division vibration.
- Example 1 From the above, as in Example 1, the effect of performing the two-step dry etching and wet etching and the effectiveness of forming a vermilion-like shape by finishing ⁇ F polishing were confirmed.
- this crystal oscillator is attached to the crystal oscillator holding frame shown in FIGS. 1 to 3 to make a final product, and this mass sensor is immersed in water maintained at 25 ⁇ 0.1 ° C. to obtain resonance characteristics.
- 100% of mass sensors with sharp resonance characteristics were obtained around the fundamental frequency of 143 MHz (100% yield).
- Example 3 using an AT-cut quartz piece as in Example 1, the diameter of the quartz oscillator is reduced to 50% of Example 1, and an example manufactured according to the present invention will be described.
- the AT cut quartz pieces as in Example 1 were polished to a thickness of 45 m, processed to a diameter of 3.0 mm, and further precisely polished to a thickness of 36 / zm to obtain a fundamental frequency of 46.389 MHz.
- 'A crystal oscillator with an oscillation strength of 40 to 50 dB was obtained.
- wet etching was performed in a saturated aqueous solution of hydrogen fluoride ammonium to obtain a fundamental frequency of 91.79 to 92.25 MHz and an oscillation intensity of 20 to 30 dB.
- the thickness of the reverse mesa at this time was 18.103-18.194 m.
- finish polishing was performed to obtain a convex lens-like inverse mesa type quartz crystal oscillator with a fundamental frequency of 96.10 to 96.48 MHz and an oscillation intensity of 30 to 50 dB and no division vibration.
- Example 1 the effect of performing the two-step dry etching and the wet etching and the effectiveness of forming a convex lens shape by final polishing after that was confirmed.
- this crystal oscillator is attached to the crystal oscillator holding frame shown in FIGS. 1 to 3 to make a final product, and this mass sensor is immersed in water maintained at 25 ⁇ 0.1 ° C. to obtain resonance characteristics.
- 100% of mass sensors with sharp resonance characteristics were obtained around the fundamental frequency of 95 MHz (100% yield).
- Example 4 using the same BT-cut quartz piece as in Example 2, the base was precisely polished and finished to a thickness of 30.0 ⁇ m and made into a 16 mm x 20 mm mouth for 48 crystal oscillators.
- the base was precisely polished and finished to a thickness of 30.0 ⁇ m and made into a 16 mm x 20 mm mouth for 48 crystal oscillators.
- RIE method to apply high frequency power 150 W * C 2 F 6 for gas pressure 13
- the crystal oscillator has a rectangular shape different from that of the second embodiment, by setting the diameter of the inverse mesh portion to 36% or the like, the fundamental frequency is 2.26 times and the sensitivity is 53.6.
- An ultra-compact mass sensor with an extremely high frequency of 323 MHz, which is twice the oscillation frequency, can now be manufactured.
- finish polishing for producing a convex lens-like surface is not performed.
- the AT cut diameter shown in Example 1 is a 6.0 mm diameter quartz chip with a thickness of 50 / m and a basic frequency of 33.40 MHz. It has a quartz crystal oscillator with an oscillation intensity of 40 to 5 OdB without reverse mesa etching. After producing a vapor deposition electrode having a diameter of 1.5 mm and measuring the resonance characteristic, all the quartz resonators having a sharp resonance characteristic with a fundamental frequency of 32.95 to 33.13 MHz were obtained. '
- the crystal oscillator is a usual one used as an electronic component.
- the crystal oscillator was attached to a commercially available small vibrator holder (usually model number UM-1Z2P2L) used for an oscillator of a normal electronic component, and the vapor deposition electrode and the electrode lead wire of the holder were soldered.
- This resonator 48 pieces showed good resonance characteristics in air, but when immersed in water kept at 25 ⁇ 0.1 ° C, its frequency fluctuates irregularly, and does not show all the stable resonance frequencies. (Yield 0%).
- Comparative Example 2 an experimental example carried out to check the quality of the holding frame of the quartz oscillator is given.
- Comparative Example 3 an experimental example performed to confirm the effect of omitting the dry etching and performing the double-sided wet etching and the effect of the quartz oscillator holder of the present invention will be described.
- Example 3 The same AT cut quartz piece as in Example 1 and Example 3 is used to make the same diameter as Example 3. 3. O mm, and it is further finely polished to a thickness of 61.85 m, fundamental frequency 27.00 MHz -A crystal oscillator with an oscillation intensity of 40 to 50 dB was obtained.
- a vapor deposition electrode having a diameter of 0.75 mm was produced on this crystal oscillator, and then attached to the crystal oscillator holding frame shown in FIGS. 1 to 3 to obtain a final product.
- This mass sensor was immersed in water kept at 25 ⁇ 0.1, and resonance characteristics were measured.
- Comparative Example 4 an experimental example carried out to investigate the effect in the case of not performing convex lens processing and finish polishing is described.
- Example 3 Use the same AT-cut quartz pieces as in Example 3 (45 m thickness after polishing, 3. O mm diameter, 36 ⁇ thickness after precision polishing finish, 46.389 MHz fundamental frequency ⁇ 40 to 50 dB oscillation strength), reverse In order to etch in a mesa shape, mask with a hole diameter of 1.5 mm, and use the radio frequency power of 150 W * C 2 F fi for R IE method to set the gas pressure 1 Next, two-step dry etching was performed at 3 Pa and then at a gas pressure of 26 Pa of a high frequency electric power 100 W ⁇ C 2 F 6 .
- This convex lens shaped reverse mesa crystal oscillator is not finished and polished, and a vapor deposition electrode with a diameter of 0.75 mm is produced, and then it is attached to the crystal oscillator holding frame shown in FIG. 1 to FIG.
- the mass sensor was immersed in water kept at 25 ⁇ 0.1 ° C., and resonance characteristics were measured.
- the holding portion of the quartz crystal resonator is improved.
- high frequency high sensitivity
- the convex lens shaped thin film is formed on the reverse-mesa-processed portion by finish-polishing the other surface after the reverse-mesa processing, and the smoothness of the surface is increased. It became possible to produce a crystal oscillator.
- the mass sensor according to the present invention has a sensitivity of 3 to 3 for the sensitivity of measuring the concentration of active substance in water solution of the conventional mass sensor from 1 ng to 30 pg / Hz. It was possible to achieve extremely high sensitivity of 0.0005 pgZHz, and it became possible to measure a small amount of mass, which was conventionally difficult to measure.
- the reverse mesa type structure is adopted on one side and the reverse mesa side is sealed so that the opposite flat side is used as the detection body, the following convenience is obtained.
- a suitable rigid crystal oscillator holding frame with a structure that reduces defects in the electrode contact area and a structure that enhances insulation. Accurate and stable measurement has become possible According to single-sided etching, a quartz crystal of a convex lens-like thin film by finish polishing, strength before wet etching, two or more stages of dry etching, and a suitable quartz oscillator By adopting the holding frame, the product yield could be made almost 100%.
- a crystal oscillator holding frame which uses an integrally molded foldable membrane type envelope, is subjected to conductive foil processing if necessary, is embedded with a conductive rod, and is folded and sealed.
- the mass productivity of the holding frame has been greatly improved, and in particular, it has become possible to make a small mass sensor.
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Abstract
Description
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Priority Applications (1)
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AU2003262005A AU2003262005A1 (en) | 2002-09-12 | 2003-09-08 | Micro mass sensor and oscillator-holding mechanism thereof |
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JP2002266987A JP2006078179A (ja) | 2002-09-12 | 2002-09-12 | マイクロ質量センサとその発振子の保持機構 |
JP2002-266987 | 2002-09-12 |
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WO2004025274A1 true WO2004025274A1 (ja) | 2004-03-25 |
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AU (1) | AU2003262005A1 (ja) |
WO (1) | WO2004025274A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009531678A (ja) * | 2006-03-31 | 2009-09-03 | アンドレアス ヘティック ゲーエムベーハー アンド カンパニー カーゲー | 測定チャンバとクィックロックを介して測定チャンバに組み込み可能な共振子とからなる液体用センサー装置 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP4847807B2 (ja) * | 2006-06-30 | 2011-12-28 | 京セラキンセキ株式会社 | Qcmセンサ |
JP4796915B2 (ja) * | 2006-07-31 | 2011-10-19 | 京セラキンセキ株式会社 | Qcmセンサ |
JP5065709B2 (ja) * | 2007-03-02 | 2012-11-07 | 国立大学法人東北大学 | 圧電振動子 |
JP5069094B2 (ja) * | 2007-12-28 | 2012-11-07 | 日本電波工業株式会社 | 圧電センサ及び感知装置 |
JP5172442B2 (ja) * | 2008-04-09 | 2013-03-27 | 独立行政法人産業技術総合研究所 | アンモニア測定素子、アンモニア測定装置、塩素測定素子及び塩素測定装置 |
Citations (6)
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---|---|---|---|---|
JPH1114525A (ja) * | 1997-06-19 | 1999-01-22 | Showa Crystal:Kk | 圧電素子保持構造 |
JPH11355094A (ja) * | 1998-06-09 | 1999-12-24 | Matsushita Electric Ind Co Ltd | 圧電振動子 |
JP2000258324A (ja) * | 1999-03-04 | 2000-09-22 | Hokuto Denko Kk | Qcmセンサデバイス |
JP2001038607A (ja) * | 1999-07-28 | 2001-02-13 | Okayama Prefecture | 高周波用水晶振動子の加工方法 |
JP2001153777A (ja) * | 1999-11-26 | 2001-06-08 | Initium:Kk | 水晶発振子 |
JP2001274128A (ja) * | 2000-01-21 | 2001-10-05 | Seiko Epson Corp | 薄板の研磨加工方法及び圧電振動片の製造方法 |
-
2002
- 2002-09-12 JP JP2002266987A patent/JP2006078179A/ja not_active Withdrawn
-
2003
- 2003-09-08 WO PCT/JP2003/011464 patent/WO2004025274A1/ja not_active Application Discontinuation
- 2003-09-08 AU AU2003262005A patent/AU2003262005A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1114525A (ja) * | 1997-06-19 | 1999-01-22 | Showa Crystal:Kk | 圧電素子保持構造 |
JPH11355094A (ja) * | 1998-06-09 | 1999-12-24 | Matsushita Electric Ind Co Ltd | 圧電振動子 |
JP2000258324A (ja) * | 1999-03-04 | 2000-09-22 | Hokuto Denko Kk | Qcmセンサデバイス |
JP2001038607A (ja) * | 1999-07-28 | 2001-02-13 | Okayama Prefecture | 高周波用水晶振動子の加工方法 |
JP2001153777A (ja) * | 1999-11-26 | 2001-06-08 | Initium:Kk | 水晶発振子 |
JP2001274128A (ja) * | 2000-01-21 | 2001-10-05 | Seiko Epson Corp | 薄板の研磨加工方法及び圧電振動片の製造方法 |
Non-Patent Citations (2)
Title |
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LIN, Z ET AL: "Operation of an Ultrasensitive 30-MHz Quartz Crystal Microbalance in Liquids.", ANALYTICAL CHEMISTRY, vol. 65, no. 11, June 1993 (1993-06-01), pages 1546 - 1551, XP002915956 * |
UTTENTHALER, E ET AL: "Ultrasensitive quartz crystal microbalance sensors for detection of M13-Phages in liquids.", BIOSENSORS AND BIOELECTONICS, vol. 16, 2001, pages 735 - 743, XP002245589 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009531678A (ja) * | 2006-03-31 | 2009-09-03 | アンドレアス ヘティック ゲーエムベーハー アンド カンパニー カーゲー | 測定チャンバとクィックロックを介して測定チャンバに組み込み可能な共振子とからなる液体用センサー装置 |
Also Published As
Publication number | Publication date |
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JP2006078179A (ja) | 2006-03-23 |
AU2003262005A1 (en) | 2004-04-30 |
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