Question

A silicon (Si) wafer is being fabricated by doping with boron (B) atoms. Which type of semiconductor is this?

Question 6 options:

A)

Intrinsic and n-type

B)

P-type

C)

N-type

D)

Intrinsic

Answer 1

B) P-type.

Step-by-step explanation:

Boron is a trivalent impurity, which means that it has three valence electrons. When boron is added to silicon, it creates a vacancy in the lattice structure. This vacancy is called a hole, and it can be considered a positive charge carrier. P-type semiconductors are created by doping a semiconductor with a trivalent impurity, such as boron.

The other options are incorrect.

• Intrinsic semiconductors are pure semiconductors, and they do not have any impurities.
• N-type semiconductors are created by doping a semiconductor with a pentavalent impurity, such as phosphorus.

So, the answer is B) P-type.