213 results about "Quartz crystal resonator" patented technology

The invention relates to the technical field of defect diagnosis, in particular to a production defect diagnosis method and system for a quartz crystal resonator. The method comprises the following steps: extracting a micro-acoustic response signal of each processing stage based on an ultrasonic excitation and response monitoring device, and carrying out acoustic time-frequency structure analysis and response track trend analysis and extraction to obtain a multi-stage crystal voiceprint behavior track sequence; deploying a multi-angle structured light interferometer array to carry out acoustic monitoring and synchronous visual acquisition, carrying out light stripe form response deviation calculation, and extracting a light stripe form response deviation section; and sound-light behavior frequency response analysis is carried out on the multi-stage crystal voiceprint behavior track sequence and the light texture form response deviation section, acousto-optic mismatch index fitting is carried out, and an acousto-optic fusion feature deviation database is constructed. Through accurate and efficient defect diagnosis and positioning, the production yield of the quartz crystal resonator is improved, and waste and energy consumption of a production line are reduced.

The utility model provides a quartz crystal resonator temperature detection device, and relates to the technical field of detection devices, the quartz crystal resonator temperature detection device comprises a moving mechanism, the top of the moving mechanism is fixedly provided with a detection mechanism, the detection mechanism comprises a support frame, the moving mechanism comprises a workbench, the bottom of the workbench is fixedly provided with four support columns, a sliding groove is formed in the top of the workbench, a sliding block is movably embedded in the inner surface wall of the sliding groove, a rack is fixedly installed at the top of the sliding block, a motor is fixedly installed at the top of the workbench, a rotating rod is arranged at the output end of the motor, and the outer surface wall of the rotating rod is fixedly sleeved with a gear. According to the utility model, the influence of external factors on the resonator can be effectively reduced, the accuracy and reliability of a detection result can be improved, the detection efficiency is improved, the manual intervention is reduced, the risk of human errors can be reduced, the stability and consistency of the detection result can be ensured, and meanwhile, the proper distance between the probe and the resonator can be ensured; therefore, accurate temperature detection is carried out.

The invention relates to the technical field of sensing detection, and discloses a quartz crystal microbalance based on a triple overtone resonance mode and a sensibilization method thereof, the sensibilization method comprises the following steps: using a triple harmonic drive circuit to drive a quartz crystal resonator sensing unit, enabling the quartz crystal resonator sensing unit to generate bridge oscillation in the triple overtone resonance mode, outputting a first electric signal containing a third harmonic frequency sweeping signal; detecting the third harmonic frequency sweep signal to obtain third resonance information, and performing inversion based on the change of the third resonance information to obtain to-be-detected micro-mass change information; wherein the tertiary resonance information comprises tertiary resonance frequency and tertiary resonance bandwidth. By adopting the third harmonic drive circuit, the quartz crystal microbalance works in a third overtone resonant mode, the third overtone resonant frequency of the quartz crystal microbalance is obviously higher than the fundamental frequency resonant frequency, and the sensitivity of the quartz crystal microbalance in the third overtone resonant mode is obviously improved as the sensitivity is in direct proportion to the resonant frequency.

The utility model discloses a quartz crystal resonator base structure suitable for multiple series of wafers, which is characterized in that a base is sequentially composed of a substrate layer, a vibrator electrode layer and a kovar ring from bottom to top; the vibrator electrode layer is provided with a cavity, and the cavity is communicated with the outside through the opening of the kovar ring; a lead PAD is also mounted in the cavity; the quartz vibrator is placed on the lead PAD; the lead PAD comprises a plurality of first-layer PAD bodies and a plurality of second-layer PAD bodies. The base is provided with a cavity, the plurality of first-layer PADs are installed in the cavity, the plurality of second-layer PADs are correspondingly installed on the plurality of first-layer PADs, and one side of each first-layer PAD extends towards the center of the base, so that at least one side of each first-layer PAD protrudes out of each second-layer PAD. According to the device, a single base can adapt to multiple series of wafers, the circuit is simple and stable, the production process is simple and convenient, the base types are further effectively reduced, the base type management efficiency is improved, the production efficiency is improved, and environmental protection and energy conservation are achieved.

A performance testing device for a quartz crystal resonator comprises a testing box, an opening is formed in the top of the testing box, the opening is sealed through an upper cover, a transversely-arranged testing plate is installed in the middle of the interior of the testing box, the testing plate is fixedly connected with the testing box through a plurality of supporting springs, and vibration equipment is installed at the bottom of the testing plate. The top of the test plate is provided with a contact pin used for being matched with a quartz crystal resonator, the contact pin is externally connected with a crystal oscillator detection frequency instrument through a wire, a pressing plate is arranged right above the contact pin, the test plate is provided with a vertically arranged guide rod, the pressing plate is transversely and movably sleeved on the guide rod, the guide rod above the pressing plate is provided with a support plate, and the support plate is arranged on the support plate. A pressing bolt matched with the pressing plate is arranged on the supporting plate in a screwed mode, and a reset spring matched with the pressing plate is further arranged on the guide rod below the pressing plate in a sleeved mode. According to the invention, the actual vibration environment can be accurately simulated, so that the influence of vibration at different temperatures on the performance of the quartz crystal resonator can be detected.

The utility model relates to the technical field of quartz crystal resonators, in particular to a quartz crystal resonator convenient to disassemble, which comprises a base, a mounting groove, a resonator body, a mounting frame, a fixing groove, a positioning mechanism, a lead and a penetrating opening, the mounting groove is arranged on the base, the resonator body is arranged in the mounting groove, the mounting frame is arranged in the mounting groove in a sliding manner, and the fixing groove is arranged in the mounting frame. The mounting frame is arranged on the base, the fixing groove is formed in the inner wall of the mounting frame and matched with the resonator body, the positioning mechanism is arranged on the mounting frame and used for mounting and fixing the mounting frame and the base, the lead is fixedly arranged on the resonator body, the penetrating opening is formed in the groove bottom of the mounting groove, and the lead penetrates through the penetrating opening. The problem that a resonator in the prior art is not convenient and stable enough to disassemble in the using process is solved.

The invention discloses a quartz crystal oscillator quality analysis method and system based on big data of an intelligent manufacturing system, and relates to the technical field of quartz crystal resonators. Appearance images and electrical performance parameters of all batches of quartz crystal oscillators are obtained from detection equipment, and appearance quality is judged according to appearance image parameters through an appearance quality judgment model; qualified products enter an electrical performance quality judgment link. By calculating electrical performance quality characteristic values such as a mean value, a standard deviation, a range and a target value, quality stability evaluation indexes such as a target fluctuation value and an overall discreteness value are obtained, and the electrical performance quality is judged by means of an electrical performance quality judgment model. Unqualified batches are substituted into a further analysis model to judge whether abnormity can be detected, screened and removed again or not, if yes, redetection is carried out according to a new detection rule, otherwise, relevant parameters are sent to technicians, and meanwhile recycling treatment is carried out.

The invention relates to an AT quartz crystal oscillator vibrating piece and a preparation method thereof in the field of quartz crystal components. The preparation method comprises the following steps: preparing a rectangular quartz wafer; processing and forming a first groove and a second groove on the quartz wafer through a yellow light process and a wet etching process; the wet etching process comprises the steps of carrying out first-stage etching by using a first-concentration BHF mixed solution, carrying out second-stage etching by using a second-concentration BHF mixed solution and carrying out third-stage etching by using a DHF mixed solution in sequence, and circulating for multiple times, wherein the HF concentration in the first-concentration BHF mixed solution is greater than the HF concentration in the second-concentration BHF mixed solution; electrodes are respectively formed at the bottoms of the first groove and the second groove; and obtaining the AT quartz crystal oscillator vibrating piece. According to the preparation method, the surface roughness of the AT quartz crystal oscillator vibration part can be effectively reduced, the in-chip uniformity is improved, the resonance quality factor is improved, the frequency dispersion difference is reduced, and the overall performance and reliability of the quartz crystal oscillator are remarkably improved.

A quartz crystal resonator including a quartz crystal obtained from a quartz bar is provided. The quartz crystal is cut from the quartz bar along a cutting plane in a coordinate system having an optic axis, an electrical axis and a mechanical axis perpendicular to each other. The cutting plane has a first angle of about 35° to about 36° from the optic axis and a second angle of about 14° to about 16° from the electrical axis. The quartz crystal has a vibration frequency deviation within a range from −30 parts per million (ppm) to about +30 ppm over a temperature range from about −50° C. to about 150° C. Methods for making the quartz crystal resonator are also provided.

To provide a crystal vibrator with a built-in temperature sensor having a new structure that can improve hysteresis of frequency-temperature characteristics of a crystal vibrator piece more than before.SOLUTION: A crystal vibrator 10 comprises a container 13, a recessed part 17, an AT-cut crystal vibrator piece 11 mounted in the container, and a temperature sensor 15 mounted in the recessed part. Two adhesive pads 13a and 13b are provided along a first direction (a) on a circumference portion of the recessed part of the container. The crystal vibrator further comprises a pedestal 23 made of crystals, arranged between the two adhesive pads and the crystal vibrator piece, one end of one surface of which is made to adhere to the two adhesive pads and in which the crystal vibrator piece is made to adhere to the other surface thereof, at two positions along an X-axis of the crystals or at two positions along a Z'-axis of the crystals. The pedestal has the X-axis or the Z'-axis, depending on whether the crystal vibrator piece is made to adhere thereto at the two positions along the X-axis or the piece is made to adhere thereto at the two positions along the Z'-axis, where the crystal vibrator piece is made to adhere to the two adhesive pads in a positional relation in which the axes are in parallel to the first direction.SELECTED DRAWING: Figure 1

A quartz crystal resonator unit that includes: a quartz crystal resonator including an excitation electrode and a connection electrode electrically connected to the excitation electrode; a base member including an electrode pad; an electrically conductive holding member that connects the connection electrode and the electrode pad to each other; and a lid member attached to the base member so as to form an internal space between the lid member and the base member in which the quartz crystal resonator is accommodated. The electrically conductive holding member is a cured product of an electrically conductive adhesive containing (1) a silicone resin as a main component and (2) an epoxy compound having two or more epoxy groups.

The invention discloses a technology and device for recycling a quartz crystal resonator base, and particularly relates to the technical field of quartz crystal resonators, and the technology comprises the following steps: 1, pouring the quartz crystal resonator base and a degumming agent into a box at the same time, carrying out water bath heating for 60 minutes, dissolving a conductive adhesive, and separating a wafer from the base; 2, a degumming agent is poured into the standby box, the quartz crystal resonator base is washed five times with hot water at the temperature of 50 DEG C, and the residual degumming agent and the wafer are washed clean; step 3, pouring the washed quartz crystal resonator base into a box filled with citric acid, and heating in a water bath for 30 minutes to remove potassium silicate on the surface of the quartz crystal resonator base; according to the invention, the conductive adhesive is decomposed by using potassium hydroxide, so that the quartz crystal resonator base is separated from the wafer, the bottleneck of base reutilization in the current crystal industry is solved, and the production cost of the quartz crystal resonator is greatly reduced.

The present invention relates to a quartz crystal resonator inspection and marking device and process, comprising a first turntable, a second turntable and an exchange station; the first turntable can rotate around its axis and drive multiple suction nozzles to rotate synchronously; along the circumference of the first turntable, there are arranged in sequence: positioning mechanism 1, testing mechanism 1, testing mechanism 2, positioning mechanism 3, and detection mechanism 2; the second turntable can rotate around its axis and drive multiple temporary tables to rotate synchronously; along the circumference of the second turntable, there are arranged in sequence: positioning mechanism 2, marking mechanism, and detection mechanism 1; the exchange station is located directly opposite the first turntable and the second turntable, and is located between testing mechanism 1 and testing mechanism 2, and is located between positioning mechanism 2 and detection mechanism 1; at the exchange station, the suction nozzle releases a quartz crystal resonator to the temporary table and picks up a quartz crystal resonator from the next temporary table. Through the above-mentioned arrangement, the present invention does not require manual intervention, improves production efficiency, and facilitates management.

The present invention discloses a method and system for quartz crystal oscillator quality analysis based on big data of intelligent manufacturing systems, which relates to the technical field of quartz crystal resonators. The present invention obtains the appearance images and electrical performance parameters of each batch of quartz crystal oscillators from detection equipment, uses an appearance quality judgment model to judge the appearance quality based on the appearance image parameters, and qualified products enter the electrical performance quality judgment link. By calculating electrical performance quality characteristic values such as mean, standard deviation, range, target value, etc., quality stability evaluation indicators such as target volatility value and overall discreteness value are obtained, and an electrical performance quality judgment model is used to judge the electrical performance quality. For unqualified batches, they are brought into a further analysis model to determine whether they can be re-detected and screened to eliminate abnormalities. If so, they are re-inspected according to the new detection rules, otherwise the relevant parameters are sent to technical personnel, and at the same time, recycling treatment is carried out.

The utility model relates to the technical field of quartz crystal resonators, in particular to a miniature quartz crystal resonator base, which comprises a ceramic base, a quartz chip arranged inside the ceramic base, a metal frame fixedly arranged at the top end of the ceramic base, a metal cover arranged at the top end of the metal frame, and a protective box fixedly arranged at the top end of the metal cover. A fixed seat is fixedly arranged in the protection box, a plurality of micro springs are arranged on the side face of the fixed seat, two movable plates are arranged on the side face of the fixed seat, push plates are fixedly arranged at the top ends of the two movable plates, a plurality of movable rods are fixedly arranged on one sides of the two movable plates, and supporting rods are fixedly arranged on one sides of the movable rods; the metal cover dismounting device has the beneficial effects that the metal cover and the metal frame can be fixed or separated by pushing the push plate, so that the dismounting efficiency of the metal cover is improved, and the maintenance convenience of the device is improved.

The utility model relates to the field of electronic detection equipment, in particular to a quartz crystal resonator final detection and test all-in-one machine, which comprises a detection machine, a detection bottom plate, a first electric slide rail, a second electric slide rail, a transverse push plate, a longitudinal limiting component and the like, and is characterized in that the detection bottom plate is arranged in the detection machine, and the first electric slide rail and the second electric slide rail are arranged in the detection machine; the first electric sliding rail and the second electric sliding rail are located on the front side and the rear side of the detection bottom plate, the first electric sliding rail is located at the left end of the second electric sliding rail, transverse push plates are connected to the first electric sliding rail and the second electric sliding rail, and a longitudinal limiting assembly is arranged on the transverse push plate at the left end and used for pushing the quartz crystal resonator in the front-back direction. The two transverse push plates push the quartz crystal resonator on the detection bottom plate to be quickly centered, and the longitudinal push plate is driven by the bidirectional screw rod, so that the quartz crystal resonator can be centered in the front-back direction, the process of finding the quartz crystal resonator is simplified, and the detection efficiency is improved.

The invention discloses an AI detection method and equipment for appearance defects of a small quartz crystal resonator, and relates to the technical field of appearance detection of quartz crystal resonators, postures of the quartz crystal resonator are automatically detected through equipment such as a photoelectric sensor and a correlation type optical fiber sensor, and the front, back, longitudinal and transverse states of a product can be quickly distinguished. Products which do not accord with standard postures are automatically analyzed, and the postures are adjusted by adopting a corresponding blowing mode, so that the products quickly reach the standard postures suitable for detection, manual intervention is avoided, the feeding and posture adjusting efficiency is greatly improved, and the production cost is reduced. The method for extracting the defect area through gray scale comparison and the defect judgment method based on gray scale threshold segmentation are combined for metal surface defect detection, high-precision and high-efficiency detection of metal surface defects is achieved, and the method is particularly suitable for automatic production of precise elements such as quartz crystal resonators and the like. And a reliable defect detection solution is provided for the field of electronic manufacturing.

The invention relates to quartz crystal resonator testing, marking, detecting and packaging equipment, which comprises a first module, a second module, a third module and a fourth module, the second module comprises a material taking assembly, the material taking assembly picks up the quartz crystal resonators output by the output end of the first module to the second module, and the second module tests, marks and detects the quartz crystal resonators to obtain qualified quartz crystal resonators. Qualified quartz crystal resonators are output through the material taking assembly; the input end of the third module receives the quartz crystal resonator output by the material taking assembly of the second module, and the third module packages the quartz crystal resonator. Through the arrangement, the production efficiency is improved, and management is convenient.

The utility model discloses a quartz crystal resonator with low power consumption and high precision, which relates to the technical field of quartz crystal resonators, and comprises a bottom base, a quartz wafer and a packaging upper cover, the bottom base and the packaging upper cover are covered to form a cavity, the quartz wafer is placed in the cavity, the quartz wafer is provided with an electrode, and the electrode is connected with the packaging upper cover. The area of the electrode is (0.7-0.82 mm) * (0.8-0.95 mm), the four corners of the electrode are each of a fillet structure, and the radius of each fillet is R 0.05-R 0.15. According to the quartz crystal resonator with low power consumption and high precision provided by the utility model, the resistance of the quartz crystal is reduced, the energy loss of the crystal oscillator is reduced, parasitic vibration and frequency hopping phenomena are avoided, and the quartz crystal resonator has high stability, high precision and excellent anti-vibration performance.

To provide a crystal oscillator that has a base made of a quartz crystal piece between a quartz crystal vibrating piece and a container, which reduces thermal stress, improves impact resistance, and prevents an increase in CI even when miniaturization is attempted.SOLUTION: A crystal oscillator 10 includes an AT-cut quartz crystal vibrating piece 11 with a rectangular planar shape, a container 13 with two adhesive pads 13a arranged along a first direction, and a quartz crystal base 23 arranged between the quartz crystal vibrating piece and the two adhesive pads. One end of the adhesive pads, base, and quartz crystal vibrating piece are vertically overlapped via silicone-based conductive adhesives 21 and 23. The quartz crystal base and quartz crystal vibrating piece are positioned such that the crystal axes of the quartz crystal are aligned. The angle θ between the quartz crystal vibrating piece and base is 0.5 degrees or greater.SELECTED DRAWING: Figure 7

The utility model discloses a quartz crystal resonator with three leads, which belongs to the resonator field and comprises a casing and a bottom plate, the casing is hollow inside, the bottom plate seals the opening at the bottom of the casing, a quartz wafer is fixed on the surface of the bottom plate, the quartz wafer is arranged inside the casing, contact bosses are symmetrically arranged on two sides of the quartz wafer, and the contact bosses are arranged in the casing. The surface of the shell is vertically and slidably provided with two connecting rods, the two connecting rods are arranged on the two sides of the quartz crystal respectively, the bottom of each connecting rod is provided with a main pin, the main pins penetrate through the lower surface of the bottom plate, and the positive pins and the negative pins can slide along contact bosses on the two sides of the quartz crystal so that the pins can be locked into the shell in the transportation process. According to the utility model, the extension distance is reduced so as to protect the pins, the pins can be pulled out and fixed through the fixing bolts when in use, and at the moment, the three surfaces of the contact boss are all in contact with the pins, so that the contact area is enlarged, and the smoothness of internal charges is ensured.

The embodiment of the invention discloses a low-power-consumption high-precision digital temperature compensation frequency control chip and method, and relates to the technical field of integrated circuits, the low-power-consumption high-precision digital temperature compensation frequency control chip comprises a temperature sensing and quantification module, a digital compensation control module and a crystal oscillator module; the digital compensation control module is respectively coupled with the temperature sensing and quantifying module and the crystal oscillator module, and the crystal oscillator module and the digital compensation control module form closed-loop connection; the crystal oscillator module comprises a quartz crystal resonator, a driving circuit and a variable capacitor array, the variable capacitor array is connected to an oscillation circuit of the crystal oscillator module, and the driving circuit is a stacked phase inverter. And meanwhile, the precision is improved from a full link of temperature acquisition, frequency compensation and oscillation control, and a digital temperature compensation frequency control chip of a high-capacity lookup table is not needed.

This utility model relates to the field of resonator leakage detection technology, and more particularly to a vacuum-sealed quartz crystal resonator leakage detection device. This utility model provides a vacuum-sealed quartz crystal resonator leakage detection device capable of independently detecting quartz crystal resonators, facilitating rapid and accurate detection of the sealing performance of individual quartz crystal resonators. A vacuum-sealed quartz crystal resonator leakage detection device includes a main body and a control module, with the control module connected to the upper front of the main body. This utility model uses a pressure sensor to detect the air pressure in the space above the placement plate and in the detection chamber. When a quartz crystal resonator leaks, the pressure sensor detects the pressure change in the detection chamber, thereby identifying the leaking quartz crystal resonator and achieving the effect of independently detecting quartz crystal resonators for rapid and accurate detection of the sealing performance of individual quartz crystal resonators.

The invention discloses a resistance-capacitance frequency modulation type ethanol water content measuring device and method, is applied to the technical field of sensors, and aims to solve the problems of complicated measuring circuit and unstable measuring result in the existing ethanol water content measurement. The detection electrode and the quartz crystal resonator are connected in series, the change of equivalent capacitance and equivalent resistance of the detection electrode and a solution system caused by the change of water content in ethanol can be further converted into the output frequency change of the device by utilizing the high-sensitivity resistance-capacitance frequency modulation characteristic of the quartz crystal resonator, and the resonant frequency is collected by the digital frequency meter. The method comprises the following steps: establishing a water content-frequency mathematical relationship expression by collecting frequency response data of a measuring device on ethanol solutions with different water contents; based on the expression, frequency information measured in real time can be converted into water content information of the ethanol solution, and online measurement of the water content of ethanol is achieved.

The invention provides a control method of a quartz crystal resonator, and relates to the technical field of resonator control, and the method comprises the steps: obtaining a multi-dimensional resonance performance parameter sequence of the quartz crystal resonator; constructing a dynamic resonance behavior prediction model by using the multi-dimensional resonance performance parameter sequence; combining with the dynamic resonance behavior prediction model, identifying the operation state abnormity of the quartz crystal resonator, and generating a fault prediction result; and performing fault type judgment and diagnosis output according to a fault prediction result, and generating a cooperative control strategy to execute distributed control. According to the invention, the technical problem that the state change and the potential fault trend of the resonator in a complex environment cannot be accurately identified in the prior art can be solved, and the technical target of intelligent adjustment of the operation state of the quartz crystal resonator based on dynamic prediction and cooperative control is achieved. The technical effects of improving the control precision, the adaptive capability and the overall reliability of the system are achieved.

The invention relates to a quartz crystal resonator testing, marking, detecting and packaging process. The quartz crystal resonator testing, marking, detecting and packaging process comprises the steps that S100, a feeding module outputs a quartz crystal resonator with the front face facing upwards to a processing module; s200, the processing module processes the quartz crystal resonators with the front faces facing upwards and outputs the qualified quartz crystal resonators to the packaging module, and S300, the packaging module packages the qualified quartz crystal resonators; s200 comprises the steps of S210 and S220, and S210, the first rotating disc rotates and drives the quartz crystal resonator to sequentially carry out feeding, first testing, exchanging, second testing, second detecting, second material discarding and feeding; s220, the second rotating disc rotates and drives the quartz crystal resonator to sequentially carry out exchange, marking, first detection and first material discarding. By means of the arrangement, all the modules work automatically, dependence on manpower is reduced, the first rotating disc and the second rotating disc in the processing module conduct different procedures synchronously, efficient circulation and collaborative operation of materials are achieved through station exchange, the production efficiency is improved, and management is convenient.

The utility model relates to the technical field of crystal resonators, and discloses a stable quartz crystal resonator, which comprises a shell structure, the shell structure comprises a shell, the top of the shell is provided with a mounting hole, the top of the shell is provided with a cover plate, and the shell is internally provided with a quartz crystal resonator structure; the quartz crystal resonator structure comprises a quartz crystal wafer, electrodes are arranged on the two sides of the quartz crystal wafer, pins are connected to the outer portions of the electrodes, a base is arranged on the outer portions of the pins in a sleeving mode, and fixing assemblies are installed on the two sides of the outer portion of the base. The fixing assembly comprises a fixing frame, mounting bases are connected to the two sides of the exterior of the fixing frame, and a circular groove and a fixing block are mounted in the fixing frame. According to the utility model, the case is movably connected, so that the internal components are convenient to mount and dismount, and the fixing components are tightly connected with the internal components, so that the effect of stable oscillation is ensured.

An oscillation device includes a first quartz crystal resonator, a driving circuit, a first buffer, an attenuator, a second quartz crystal resonator and a second buffer. The first and second quartz crystal resonators have first and second resonant frequencies, respectively. The driving circuit drives the first quartz crystal resonator to generate a first oscillation signal having the first resonant frequency. The first buffer generates a first clock signal using the first oscillation signal. The attenuator reduces a waveform swing of the first clock signal to generate an attenuated signal. The second quartz crystal resonator rectifies the attenuated signal to generate a second oscillation signal having the second resonant frequency. The second buffer generates a second clock signal using the second oscillation signal.

The invention discloses a small-size low-frequency-deviation quartz wafer and an SMD (Surface Mounted Device) crystal resonator, and relates to the technical field of piezoelectric quartz wafers and quartz crystal resonators. A quartz wafer adopts an SC shear stress compensation cut type, the quartz wafer is of a cuboid structure, and a notch penetrating through a wafer body is formed in one wide edge side of the quartz wafer; the SMD crystal resonator comprises a metal upper cover, a surface rubber conductive adhesive point, an upper-layer gold electrode, a quartz wafer, a lower-layer gold electrode, a bottom rubber conductive adhesive point and a ceramic base which are sequentially arranged from top to bottom. According to the invention, the frequency drift of the small-size crystal resonator caused by stress can be reduced, so that the frequency precision of the crystal resonator is improved.

The utility model relates to the technical field of resonators, in particular to a reverse-table-shaped AT-type quartz high-frequency wafer and a quartz crystal resonator, the quartz crystal resonator comprises a wafer, the wafer comprises a wafer body, the wafer body comprises a vibration area and an outer frame integrally formed on the periphery of the vibration area, the outer frame is provided with a rectangular periphery, and the periphery of the wafer body is provided with a groove; the two opposite side faces of the vibration area are sunken relative to the outer frame, and the minimum width of the outer frame in the direction away from the vibration area is not smaller than 20 micrometers. Each electrode comprises an excitation electrode and an extraction electrode which are electrically connected, the pair of excitation electrodes are arranged on the two opposite side faces of the vibration area respectively, the projections of the excitation electrodes in the thickness direction of the sheet body are overlapped, and the area of each side face of the vibration area is 1.5-9 times that of the excitation electrode on the corresponding side face. The utility model has the effects of reducing the crystal impedance and improving the frequency stability of a wide temperature range.