Question

In Schottky barrier diode, which contact has similar characteristics to that of an ordinary PN diode?

(a) Ohmic contact

(b) Schottky barrier contact

(c) Both ohmic and Schottky barrier contact

(d) None of the mentioned

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Answer 1

The correct answer is:

(b) Schottky barrier contact

Explanation:

In a Schottky barrier diode, the Schottky barrier contact is formed between a metal and a lightly doped semiconductor, creating a rectifying behavior similar to that of an ordinary pn junction diode. The rectification occurs due to the potential barrier at the metal-semiconductor interface, allowing current to flow easily in one direction but blocking it in the reverse direction.

• Ohmic contact is designed to provide a low-resistance path for current in both directions, which is not a characteristic of a pn junction diode.
• Schottky barrier contact is the correct choice because it exhibits diode-like rectification, akin to a pn junction.
• Both ohmic and Schottky barrier contact is incorrect because only the Schottky barrier contact shows diode-like behavior.
• None of the mentioned is incorrect since the Schottky barrier contact is similar to the pn diode.