A closed planar three-electrode spark switch and its preparation method

A spark switch, three-electrode technology, used in spark plugs, spark gaps, spark gap components, etc., can solve the problem of unstable self-breakdown performance and conduction performance of switches, the influence of circuits around the spark, and the performance of high overload resistance. It can achieve the effect of shortening the processing cycle, low price and strong ablation resistance.

Active Publication Date: 2021-06-08
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the development of detonating foil detonation technology towards miniaturization and planarization, the traditional spark gap switch has the disadvantages of large size, difficulty in integration, and high price, and a planar three-electrode spark switch has appeared Its electrodes are exposed in the atmospheric environment, and its performance is affected by atmospheric temperature and humidity, particles, pollutants, electrode oxidation, etc., and the self-breakdown performance and conduction performance of the switch are unstable.
Secondly, the electric spark generated during the conduction process of the planar three-electrode spark switch may affect the surrounding circuits
In addition, the common planar three-electrode spark switches are based on MEMS technology and LTCC technology, usually use ceramics and other materials as the substrate, the performance of high overload resistance is not good, and the price is relatively expensive

Method used

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  • A closed planar three-electrode spark switch and its preparation method
  • A closed planar three-electrode spark switch and its preparation method
  • A closed planar three-electrode spark switch and its preparation method

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preparation example Construction

[0035] The preparation process of the closed planar three-electrode switch is as follows:

[0036] The process includes the following specific steps:

[0037] The first step is to clean the bottom PCB (1) board, and use the methods of exposure, development and etching to apply copper on the upper surface of the bottom PCB board 1 to obtain the circuit pattern corresponding to the switch, including the anode 2-1 of the switch , the cathode 2-2, the trigger electrode 2-3 and the pad 2-4 connected to it.

[0038] The second step is to perform chemical nickel-gold or tin spraying process treatment on the pads 2-4 on the circuit layer to ensure the solderability and flatness of the pads; the anode 2-1 and the cathode 2-2 on the circuit layer are Processes such as immersion gold or gold plating are performed on the trigger electrodes 2-3 to prevent the electrodes from being oxidized.

[0039] The fourth step is to use laser or mechanical cutting to open windows in the area corresp...

Embodiment 1

[0044]This implementation case designs a closed plane three-electrode spark switch based on printed circuit board technology. According to the printed circuit board technology, combined with its processing steps, the switch can be divided into four parts: the bottom PCB board 1, the circuit layer 2, the PP layer 3 and the top PCB board 4. The thickness of the bottom PCB board 1 is 1mm, and the material is FR-4, which is used as the carrier of the circuit layer in the whole switch. The circuit layer 2 directly etches the copper on the upper surface of the bottom PCB board 1 by the processes of printing oil, developing, etching, and film stripping to obtain the pattern corresponding to the switch. The thickness of the circuit layer is 35 μm. The circuit layer includes three electrodes of the planar three-electrode switch, namely the anode 2-1, the cathode 2-2, the trigger electrode 2-3 and the three pads 2-4 connected to it; the anode and the cathode are semicircular electrodes....

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Abstract

The invention belongs to the field of high-power pulses, and in particular relates to a closed planar three-electrode spark switch and a preparation method thereof. It includes the bottom PCB board, the circuit layer, the PP layer and the top PCB board in turn. The bottom PCB board is the substrate of the switch circuit layer; the circuit layer includes the anode, the cathode and the trigger electrode and the pads connected to them; the PP layer corresponds to the position of the pad There is a window for the pad, and an electrode window is set at the position corresponding to the electrode; the top layer PCB is provided with a pad slot corresponding to the pad, and a blind slot is provided at the position corresponding to the electrode; the PP layer is used as the top PCB board and the bottom layer The dielectric layer bonded to the PCB board uses the PP layer to press the bottom PCB and the bottom PCB board to form a cavity inside the entire switch. The invention utilizes printed circuit board technology to make the plane three-electrode spark switch into a closed type, which stabilizes the working environment of the switch, improves the ability of the switch to withstand high overload, and greatly reduces the cost, and can be widely used in explosive foil detonators, Pulse power systems such as electric guns.

Description

technical field [0001] The invention belongs to the field of high-power pulses, and in particular relates to a closed-type plane three-electrode spark switch and a preparation method. Background technique [0002] Switching technology is one of the core technologies of the pulse power system, which determines the output characteristics of the pulse power. The basic requirements of high-voltage switches include high withstand voltage, small inductive reactance and impedance, short turn-on delay time and rise time, allowing large current to pass, good consistency, long life, and so on. Based on the above characteristics, high-voltage switches play an important role in pulsed power systems such as explosive foil detonation systems. [0003] The performance of the high-voltage switch has a great influence on the rise time and current size of the current in the entire discharge circuit. Commonly used high-voltage switches include cold cathode trigger tubes (gas switches), vacuu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01T1/22H01T21/00H05K1/16H05K3/00H05K3/46
CPCH01T1/22H01T21/00H05K1/16H05K3/0002H05K3/0082H05K3/4611
Inventor 朱朋汪柯胡艳张伟吴立志叶迎华沈瑞琪
Owner NANJING UNIV OF SCI & TECH
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