[Solved] The material used to fabricate IMPATT diodes is GaAs since they have the highest efficiency in all aspects.

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Q.	The material used to fabricate IMPATT diodes is GaAs since they have the highest efficiency in all aspects.
A.	true
B.	false
Answer» B. false
Explanation: impatt diodes can be fabricated using silicon, germanium, gaas or indium phosphide. out of these materials, gaas have highest efficiency, low noise and high operating frequencies. but gaas has a major disadvantage of complex fabrication process and higher cost. so, gaas are not preferred over silicon and germanium.

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