Over-voltage protection element

Abstract

The invention discloses an over-voltage protection element which mainly comprises a substrate, a porous material layer arranged on the substrate, an electrode layer and an adjustable resistance material layer. The porous material layer is provided with a plurality of through holes, and the electrode layer is printed on the porous material layer. When the electrode layer is printed on the porous material layer, supplement sol / solvent and unshaped sol can be rapidly absorbed through the through holes by surface tension so that the electrode layer is fixed and molded and then sintered to prevent the sol of the electrode layer from turning the edges of the electrode layer into acute loss due to naturally dispersing, and further solve the problem of point discharge of the over-voltage protection element. Moreover, the invention has easy, rapid process and no loss of a reduced effective discharging area.

Description

technical field [0001] The invention relates to an overvoltage protection element, especially an overvoltage protection element comprising a porous material layer, the through holes of the porous material layer can absorb excess sol / solvent and unshaped sol in the process through surface tension, and then The electrode layer can be shaped quickly without tip discharge. Background technique [0002] For existing overvoltage protection components see Figure 4 As shown, it mainly includes a substrate 60, a conductive pair 61 and a variable resistance material layer 62, wherein the substrate 60 is a density greater than 3.5g / cm 3 glass or ceramic substrate; the conductive pair 61 is printed on the surface of the substrate 60, the conductive pair 61 includes a signal conductive layer 611 and a ground conductive layer 612 separated from the signal conductive layer 611; the variable impedance material layer 62 It is printed between the signal conductive layer 611 and the ground c...

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Problems solved by technology

[0009] see again Figure 8 As shown, however, when cutting the electrode layer 72 in the manufacturing method of the aforementioned voltage protection element, it is very easy to produce a burr 721 at the cutting place of the electrode layer 72. If the burr 721 is not handled properly, it is very easy to cause a short circuit of the electrode or still have a tip. The discharge situation exists. Therefore, the process steps of the overvoltage protection element are relatively complicated, time-consuming, and the process is difficult.

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