Question

13. What is the purpose of the epi layer on the silicom？(   )

 a. The epi layer is used to form the gate of the transistor.

b. The epi layer provides a low defect crystal structure.

c. The epi layer has already been doped with n-type dopant to serve as the n-well.

d. The epi layer provides isolation between metal layers.

Answer 1

b. The epi layer provides a low defect crystal structure.