Methods: To treat teeth with fluoride treatments before or after etching.

方法：在酸蚀前后分别用氟化泡沫对牙釉质进行氟化处理。

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If, once in the developing after etching, anti etch removal is not clean, can cause a short-circuit defect.

如果，一旦于显影后蚀刻前，出现抗蚀刻剂去除不净，会导致短路缺陷的发生。

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After etching the surface of GaAs chip could be smooth and the isolation grooves have little edges, which can completely meet the requirements of device design.

腐蚀后芯片表面平整度、侧蚀等指标初步达到器件设计的要求。

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After etching away the chrome, DuPont beams fluorine atoms in a highly excited plasma state to cut away parts of the quartz itself from selected parts of the design.

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