激光功率密度和后续热处理温度对PT C热敏电阻方阻和电阻温度系数影响较大，并都存在一个最佳值。

The laser power density and the temperature of post heat processing have great effect on the sheet resistivity and TCR of PTC thermistor, and there exist optimum values for these parameters.

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实践证明，在一定功率密度范围内，估算值较好地符合了实验测定数据。

Experiment shows that measured data in certain power density range accord well with the calculations.

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