An electrostatic suppressor with overcurrent protection function and its manufacturing method

Abstract

The invention discloses a static suppressor with overcurrent protection functions, and a manufacturing method thereof. The manufacturing method comprises following steps: (1) a ceramic substrate is selected; (2) a front side electrode and a back side electrode are formed via printing on the upper surface and the lower surface of the ceramic substrate respectively, and are dried; (3) an upper surface electrode is formed via printing on the upper surface and the lower surface, or one selected from the upper surface and the lower surface of the ceramic substrate, and is dried; (4) the electrodes above are subjected to sintering; (5) insulating layers are formed via respective printing on the surface electrodes; (6) the insulating layers are subjected to sintering; (7) the surface electrodes and the insulating layers are subjected to cutting so as to form gaps; (8) printing of pressure sensitive material layers is performed so as to fill the gaps, and solidification is realized; (9) printing of a first protection layer is carried out, and solidification is realized; (10) melt layers are formed; (11) printing of a second protection is carried out, and solidification is realized; (12) first cutting is carried out; (13) side surface internal electrodes are formed; (14) second cutting is carried out; (15) copper internal electrodes are formed; and (16) nickel coatings and tin coatings are formed via electroplating so as to obtain the static suppressor with overcurrent protection functions.

Description

technical field [0001] The invention relates to an overcurrent and overvoltage protection element, in particular to an electrostatic suppressor with an overcurrent protection function, and a manufacturing method of the protection element. Background technique [0002] Static electricity is a phenomenon that exists on the surface of an object and reflects that its positive and negative charges are out of balance in a local area. It is mainly generated through physical processes such as contact and separation of substances, electrostatic induction, medium polarization, and the attachment of charged particles. High, the duration is very short, and the release energy is not strong. With the development of electronic component technology, the harm caused by static electricity to the application of components is becoming more and more obvious. The purpose of introducing electrostatic protection components is to prevent the working circuit from being damaged by electrostatic disch...

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Problems solved by technology

[0004] U.S. Patent US7660096B2 proposes to integrate PPTC thermistor and metal oxide MOV varistor technology in one device, thereby reducing the space requirement and the number of components on the circuit board, and can meet the requirements for telephone communication equipment including lightning strikes, electrostatic discharge, equipment Protection against damage such as contact with power lines and AC line induction, helps to limit current in overcurrent events, and has overvoltage clamping capability; after the fault condition is eliminated and the power is turned on, it can be reset again, and communication equipment can be Continue to run; however, since this type of product has a three-terminal pin structure, it cannot meet the needs of surface welding, and the product is large in size, so there is no obvious advantage in application

U.S. Patents US6636404B1 and US6982859B1 proposed a layer of pressure-sensitive functional phase formed on the surface of the porcelain tube of the fuse shell, and connected with the electrode at one end of the fuse using a bonding process, forming a side electrode in the middle of the porcelain tube, thereby protecting the overvoltage Packaged with overcurrent protection into one component, the design of this product is relatively simple, but it is difficult to realize batch continuous production and the cost is high

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