Energy gap between the conduction band
The energy gap between the conduction band and the valence band is large for
a) conductors
b) semiconductors
c) superconductors
d) insulators
e) alloys
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A solution consisting of four parts 70% HNO3 , four parts 49% HF, and two parts CH3COOH is used to etch silicon. If the solution is held at room temperature, what etch rate would you expect? If the compound is to remain at two parts CH3COOH, what
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