氮化硅的ECCP刻蝕特性研究
[Abstract]:In this paper, the enhanced capacitive coupled plasma etching of silicon nitride is studied, which provides a reference for the optimization of silicon nitride etching process. The effects of power, pressure, gas ratio and helium gas on etching rate and uniformity of SF_6 O _ 2 gas system were investigated by designing experiments. The mechanism of the results was analyzed and discussed. The experimental results show that the higher the power, the higher the etching rate. Compared with the source RF power, the bias RF power has more significant effect on the etching rate, the pressure increases, the etching rate increases, but the pressure increases to a certain extent. The etching rate is basically unchanged, the etching uniformity becomes worse with the increase of pressure, and the proportion of O _ S _ 2 increases under the condition of keeping the total SF_6/O_2 flow constant, the etching rate increases first and then decreases, and the etching uniformity is improved gradually by the addition of he. However, when the amount of He is too much, the etching rate will be reduced.
【作者單位】: 北京京東方顯示技術(shù)有限公司;
【分類號】:TN305.7
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