Explanation: Boron is a p-type material, whereas Phosphorous is an n-type material. 10. In the fabrication of monolithic ICs, Boron chloride is added as an impurity in the diffusion process. Find the diffusion time, if the furnace is heated up to 1200oc.
A. 1 hour
B. 2 hours
C. 45 minutes
D. 30 minutes
Answer:A
Explanation: Boron is a p-type material, whereas Phosphorous is an n-type material. 10. In the fabrication of monolithic ICs, Boron chloride is added as an impurity in the diffusion process. Find the diffusion time, if the furnace is heated up to 1200oc.
A. 1 hour B. 2 hours C. 45 minutes D. 30 minutes
Explanation: In diffusion process, the depth of diffusion of impurities depends upon the time taken for diffusion, which normally extends for more than 2 hours. 11. Which component is not used as an impurity in diffusion process?