Positive temperature coefficient element

Abstract

A positive temperature coefficient element includes a laminated substrate, a first PTC material layer, a second PTC material layer, a first metal layer and a second metal layer. The laminated substrate includes a first conductive layer, a second conductive layer, and an insulating layer stacked between the first conductive layer and the second conductive layer. The first PTC material layer is disposed on the surface of the first conductive layer. The second PTC material layer is disposed on the surface of the second conductive layer. The first metal layer is disposed on the surface of the first PTC material layer. The second metal layer is disposed on the surface of the second PTC material layer. The insulating layer includes at least one through hole, and the through hole is filled to form a PTC connector, one end of the PTC connector is connected to the first PTC material layer, and the other end is connected to the second PTC material layer.

Description

technical field [0001] The present invention relates to a thermistor, in particular to a positive temperature coefficient (Positive Temperature Coefficient; PTC) element. Background technique [0002] Positive temperature coefficient elements can be used to protect circuits from damage due to overheating or the flow of excess current. A positive temperature coefficient element typically includes two electrodes and a resistive material located between the two electrodes. This resistance material has a positive temperature coefficient characteristic, that is, it has a low resistance value at room temperature, and when the temperature rises to a critical temperature or an excessive current is generated on the circuit, its resistance value can immediately jump hundreds or thousands of times or more. , so as to suppress the passage of excessive current to achieve the purpose of circuit protection; or applied to the over-temperature detection circuit, the ambient temperature can ...

AI Technical Summary

Problems solved by technology

However, because the electrode surfaces on both sides are not symmetrical and have front and back sides, it is troublesome to distinguish the front and back sides during subsequent electrical testing and packaging, and if the isolation line is produced due to the influence of material expansion and contraction, it will cause deviations between the left and right electrodes. Larger and smaller will affect welding and electrical characteristics

In addition, the component has no PP structural support, and there may be problems of insufficient strength and easy breakage during the manufacturing process

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