Low-capacitance surge protector
By using low-dielectric constant materials and corresponding electrode structures in low-capacitance surge protectors, the problems of high electrostatic capacity and low withstand voltage characteristics in the prior art are solved, and low electrostatic capacity and high-efficiency electronic circuit protection are achieved.
Patent Information
- Application Number
- CN202420186236.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-25
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-01-25
AI Technical Summary
When existing low-capacitance surge protectors are used in high-frequency electronic circuits, high electrostatic capacity leads to signal distortion, and low withstand voltage characteristics easily leads to interruption of electronic circuits.
Using low dielectric constant (LTCC) materials, by forming corresponding electrodes inside the product and forming gaps between the electrodes, the discharge characteristics between the electrodes when high voltage is applied outside are used to prevent high voltage from developing in the direction of electronic circuits.
Low static capacity is achieved, prevents electronic circuit signal distortion and effectively protects electronic circuits from overvoltage damage.
Smart Images
Figure CN222580975U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of capacitor protection, in particular to a low-capacitance surge protector. Background Art
[0002] A low-capacitance surge protector is a structure for protecting electronic circuits. It is used to protect the high-frequency internal electronic circuits of portable devices and to prevent sudden overvoltage shocks from being applied to portable devices from the outside. With the continuous development of science and technology, people have higher and higher requirements for the manufacturing process of low-capacitance surge protectors.
[0003] Existing low-capacitance surge protectors have certain drawbacks when used. Generally, components with the same purpose include components such as Varistor and Zener Diode. Varistor is not suitable because of its high electrostatic capacitance, which will cause distortion of electronic signals when applied to electronic circuits using high frequencies. It also has the disadvantage of slow reaction speed to the surge-type high voltage flowing through the GND terminal. In the case of Zener Diode form, due to its low withstand voltage characteristics, when a high voltage is applied, it will be damaged, resulting in the problem of interruption of the electronic circuit. For this reason, we propose a low-capacitance surge protector. Utility Model Content
[0004] Technical problem solved: In view of the shortcomings of the prior art, the utility model provides a low-capacitance surge protector, which uses LTCC material to form corresponding electrodes inside the product and form gaps between the electrodes. When high voltage is applied from the outside, the discharge characteristics between the corresponding electrodes are utilized to prevent the applied high voltage from developing in the direction of the electronic circuit. Low dielectric constant LTCC material is used to achieve low electrostatic capacitance, thereby preventing electronic circuit signal distortion, which can effectively solve the problems in the background technology.
[0005] Technical solution: To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a low-capacitance surge protector, including an LTCC ceramic structure, an external electrode is positioned at the bottom of the LTCC ceramic structure, an internal electrode is positioned inside the LTCC ceramic structure, a resonant cavity is opened in the middle of the internal electrode, a through hole is positioned between the internal electrode and the external electrode, the LTCC ceramic structure is provided with several groups, and the LTCC ceramic structure is a low dielectric constant structure with a dielectric constant of less than 10.
[0006] Preferably, the internal electrode is formed between a plurality of LTCC ceramic structures and is sintered and formed simultaneously with the plurality of LTCC ceramic structures.
[0007] Preferably, the internal electrode is connected to an externally formed terminal through one or more through holes in the LTCC ceramic structural substrate.
[0008] Preferably, the resonant cavity formed inside the LTCC ceramic structure is formed between internal electrodes corresponding to each other.
[0009] Beneficial effects: Compared with the prior art, the utility model provides a low-capacitance surge protector with the following beneficial effects: the low-capacitance surge protector uses LTCC materials to form electrodes corresponding to each other inside the product and to form gaps between the electrodes. When high voltage is applied from the outside, the discharge characteristics between the corresponding electrodes are used to prevent the applied high voltage from developing in the direction of the electronic circuit. The low dielectric constant LTCC material is used to achieve low electrostatic capacitance, thereby preventing electronic circuit signal distortion;
[0010] Low capacitance power supply is used to protect electronic circuits from being damaged by external overvoltage. At present, with the increase in the frequency of use of electronic circuits, low capacitance products are needed. Therefore, the purpose of the present invention is to achieve low capacitance by using low dielectric constant LTCC materials instead of existing high dielectric constant materials to prevent signal distortion in the high frequency band, and by using the gap between the corresponding electrodes formed inside the product, using the discharge effect of the externally applied high voltage to prevent the flow into the internal electronic circuit, thereby protecting the electronic circuit. The entire low capacitance surge protector has a simple structure, is easy to operate, and has a better effect than the traditional method. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 The utility model is a schematic diagram of the overall structure of a low-capacitance surge protector.
[0012] Figure 2 The utility model is a schematic structural diagram of a side view of a low-capacitance surge protector.
[0013] Figure 3 The utility model is a schematic diagram of a top view of a low-capacitance surge protector.
[0014] Figure 4 This is a circuit diagram of a low-capacitance surge protector of the utility model.
[0015] In the figure: 1. LTCC ceramic structure; 2. internal electrode; 3. through hole; 4. resonant cavity; 5. external electrode. DETAILED DESCRIPTION
[0016] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but those skilled in the art will understand that the embodiments described below are part of the embodiments of the utility model, rather than all of the embodiments, and are only used to illustrate the utility model, and should not be considered as limiting the scope of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the utility model. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.
[0017] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0019] like Figure 1-4 As shown, a low capacitance surge protector comprises an LTCC ceramic structure 1, an external electrode 5 is positioned at the bottom of the LTCC ceramic structure 1, an internal electrode 2 is positioned inside the LTCC ceramic structure 1, a resonant cavity 4 is opened in the middle of the internal electrode 2, a through hole 3 is positioned between the internal electrode 2 and the external electrode 5, and the LTCC ceramic structure 1 is provided with a plurality of groups. The LTCC ceramic structure 1 is a low dielectric constant structure with a dielectric constant less than 10. LTCC materials are used to form electrodes corresponding to each other inside the product, and gaps are formed between the electrodes. When high voltage is applied from the outside, the discharge characteristics between the corresponding electrodes are used to prevent the applied high voltage from developing in the direction of the electronic circuit. Low dielectric constant LTCC materials are used to achieve low electrostatic capacitance, thereby preventing electronic circuit signal distortion.
[0020] Furthermore, the internal electrode 2 is formed between the multiple LTCC ceramic structures 1 and is sintered and formed simultaneously with the multiple LTCC ceramic structures 1 .
[0021] Furthermore, the internal electrode 2 is connected to an externally formed terminal through one or more through holes 3 in the substrate of the LTCC ceramic structure 1 .
[0022] Furthermore, the resonant cavity 4 formed inside the LTCC ceramic structure 1 is formed between the internal electrodes 2 corresponding to each other.
[0023] Working principle: The utility model includes an LTCC ceramic structure 1, an internal electrode 2, a through hole 3, a resonant cavity 4, and an external electrode 5. LTCC material is used to form corresponding electrodes inside the product, and gaps are formed between the electrodes. When high voltage is applied from the outside, the discharge characteristics between the corresponding electrodes are used to prevent the applied high voltage from developing in the direction of the electronic circuit. Low dielectric constant LTCC material is used to achieve low electrostatic capacitance, thereby preventing electronic circuit signal distortion.
[0024] The Low Capacitance Surge Protector used to achieve the technical problem is formed by integrating multiple ceramic sheets, internal electrodes formed on the ceramic sheets, through holes connecting the resonant cavity and the internal electrodes, and external electrodes for mounting on electronic circuits using a simultaneous sintering process.
[0025] The LTCC material is formed using a low dielectric constant material having a dielectric constant of less than 10.
[0026] The internal electrodes are made of Ag, Pt, Pd, Cu, etc., are formed between a plurality of ceramic sheets, and are formed by sintering the plurality of ceramic sheets simultaneously.
[0027] A plurality of ceramic sheets may be formed by using the same material or by sintering two or more materials simultaneously.
[0028] The built-in electrodes are connected to externally formed terminals through one or more through holes in the ceramic substrate.
[0029] The resonance cavity 4 formed inside is formed between the internal electrodes corresponding to each other.
[0030] The conductive vias, external electrodes are composed of substances such as Ag, Pt, Pd and Cu or their alloys.
[0031] Cavity gaps are formed on the sheet by punching methods, etc., and a paste made of a mixture of synthetic organic matter and trace inorganic matter is used to fill the gaps through a printing process, which is then volatilized through a degreasing and sintering process, and the space is realized as a Cavity gap.
[0032] The paste for forming the cavity is made by mixing 10% or less of Boron Silicate glass with organic substances of the PVB, EC, and PVA series.
[0033] It should be noted that, in this article, relational terms such as first and second (number one, number two), etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0034] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.
Claims
1. A low capacitance surge protector, comprising a LTCC ceramic structure (1), characterized in that: An external electrode (5) is positioned at the bottom of the LTCC ceramic structure (1), an internal electrode (2) is positioned inside the LTCC ceramic structure (1), a resonant cavity (4) is opened in the middle of the internal electrode (2), a through hole (3) is positioned between the internal electrode (2) and the external electrode (5), the LTCC ceramic structure (1) is provided with a plurality of groups, and the LTCC ceramic structure (1) is a low dielectric constant structure with a dielectric constant less than 10.
2. A low capacitance surge protector according to claim 1, characterized in that: The internal electrode (2) is formed between a plurality of LTCC ceramic structures (1) and is sintered and formed simultaneously with the plurality of LTCC ceramic structures (1).
3. A low capacitance surge protector according to claim 1, characterized in that: The internal electrode (2) is connected to an externally formed terminal through one or more through holes (3) in the substrate of the LTCC ceramic structure (1).
4. A low capacitance surge protector according to claim 1, characterized in that: The resonant cavity (4) formed inside the LTCC ceramic structure (1) is formed between internal electrodes (2) corresponding to each other.