why Ge is not used as substrate in IC Fab?

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Hi~~

I've heard that the oxide quality for Si is best among all semiconductor material, thus, helping wafer fabrication very much, then, leading to a low-cost processing.

Bye~~
 

Isn't it the cost -- I believe the cost of germanium is about $3/gram.

Cheers,
v_c
 

as we know that conductivity of si greater than ge. and subrate plays a very imp role in current conduction so definately si used
 

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