Manufacturing method for passive electric component having over-temperature protection function
A technology of over-temperature protection and manufacturing method, applied in the direction of resistors with positive temperature coefficient, resistors with negative temperature coefficient, resistance manufacturing, etc., can solve the problems that cannot meet the requirements of miniaturization and low cost of electronic products, To achieve the effect of improving safety
Active Publication Date: 2012-11-14
曾清隆
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Problems solved by technology
[0005] However, the disadvantage of the above-mentioned prior art is that it cannot meet the requirements of miniaturization and cost reduction of electronic products.
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[0018] The implementation of the present invention will be described in more detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it after studying this specification.
[0019] The manufacturing method of the passive electronic component with over-temperature protection of the present invention is to form the passive electronic component with over-temperature protection by post-processing the standard passive electronic components.
[0020] refer to figure 2 , a flow chart of the manufacturing method of the passive electronic component with over-temperature protection of the present invention. Such as figure 2 As shown, the manufacturing method of the present invention includes steps S10, S20, S30, S40 and S50 performed in sequence, so as to realize the post-processing of standard passive electronic components and form the required passive electronic components with over-temperature protection .
[0021] To clearly ill...
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The invention discloses a manufacturing method for a passive electric component having an over-temperature protection function. The passive electric component having an over-temperature protection function is formed after post-processing of a standard passive electric component. The manufacturing method comprises the following successive steps: processing of an open pore, welding of a temperature fuse, welding of a third pin, formation of a joint filling layer and formation of a coating insulation layer so as to realize combination of the temperature fuse with the standard passive electric component. Therefore, the passive electric component manufactured by using the manufacturing method provided by the invention can provide an over-temperature protection function since a varistor makes use of the characteristic that the temperature fuse fuses and leads to breaking of a circuit when the temperature of the temperature fuse is over an upper limit value, and thus security of the passive electric component during practical operation and utilization is improved.
Description
technical field [0001] The invention relates to a manufacturing method of a passive electronic component with over-temperature protection, especially a piezoresistor, a thermistor or a ceramic capacitor with an over-temperature protection function. Background technique [0002] General varistors (Varistor) have special nonlinear current-voltage characteristics, mainly composed of zinc oxide (ZnO). The voltage and current changes of a typical varistor can be divided into three major regions: "leakage current region (non-collapse region)", "non-ohmic region (collapse region)", and "high current turning region". Therefore, if the varistor and the load are connected in parallel, the resistance of the varistor will be extremely large, about 1012-13 ohm-cm, and the leakage current is extremely low under normal operation, that is, operating in the leakage area. About less than 1mA. However, once an abnormal situation occurs, such as lightning strike, switching action or power sys...
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Login to View More IPC IPC(8): H01C17/00H01C7/02H01C7/04H01G4/40
Inventor 曾清隆
Owner 曾清隆