Chip piezoresistor and manufacturing method thereof

A technology of varistors and manufacturing methods, which is applied in the direction of varistors, varistor cores, resistors, etc., can solve the problems that varistors cannot meet production needs, affect the production speed of enterprises, and increase labor costs. Achieve the effect of low production cost, low price and high production efficiency

CN108320875APending Publication Date: 2018-07-24DONGGUAN YOUCHEN ELECTRONICS CO LTD
0 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-07-24

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a chip piezoresistor and a manufacturing method thereof. The chip piezoresistor comprises a piezoresistor chip, a lower electrode, an upper electrode and a potting body. The piezoresistor chip, the lower electrode and the upper electrode are encapsulated through epoxy resin through the potting body to form an integrated structure. The upper and lower surfaces of the piezoresistor chip are respectively provided with an upper sliver film and a lower sliver film. The lower electrode comprises a lower connecting surface, a lower inclined surface and a lower welding surface.The upper electrode includes an upper connecting surface, an upper inclined surface and an upper welding surface. The upper silver film and the upper connecting surface are fixedly connected. The lower silver film and the lower connecting surface are fixedly connected. The manufacturing method comprises preparing a Z-shaped upper electrode and a lower electrode from tinned metal sheets through amechanical mold, connecting the piezoresistor chip to the upper electrode and the lower electrode through soldering and carrying out sealing through encapsulation. The manufacturing method can producethe chip piezoresistor, solve the laminating defects of the piezoresistor, improve the production efficiency and reduce a cost.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of resistors, in particular to a chip varistor and a manufacturing method thereof. Background technique

[0002] The varistor is a very sensitive voltage resistance element, which belongs to the nonlinear resistance and is used as a voltage surge protection device in the circuit. The size of the protection force is usually determined by the flow rate of the piezoresistor, and the size of the flow rate depends on the surface area of ​​the piezoresistor electrode, so the shape of the piezoresistor with a large flow rate is also large. For many years, the practice of traditional technology has made the varistor into an in-line method to reduce the space occupied by the varistor on the circuit board when welding, so that the varistor can only be installed on the circuit board by the in-line process . However, the current operating methods of enterprises using varistors are gradually shifting to high-efficiency...

Examples

Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] like Figure 1 to Figure 4 As shown, the present invention provides a chip varistor, including a varistor chip 1, a lower electrode 4, an upper electrode 5 and a potting body 6, and the potting body 6 encapsulates the varistor chip through epoxy resin. 1. The lower electrode 4 and the upper electrode 5 are packaged to form an integrated structure.

[0027] Wherein the shape of the piezoresistor chip 1 is a cylinder or a cuboid.

[0028] The upper surf...