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Wet Isotropic and Anisotropic Etching - ECE

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Iso-Etch Curves<br />

� 3 parts acetic acid<br />

� 3 parts ~70%<br />

HNO 3<br />

� 4 parts ~49% HF<br />

� Etch rate of<br />

solution the curve<br />

corresponding<br />

with intersection<br />

point (56 µm/min)

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