Question

The number of square contained in the integrated resistor by diffused resistor method depend on ratio of

(a) ρ/t

(b) ρ×L/W

(c) W/L×t

(d) L/W

This question was addressed to me by my school principal while I was bunking the class.

I want to ask this question from Active and Passive Components of IC topic in chapter IC Fabrication of Linear Integrated Circuits

Answer 1

The correct answer is:

(d) L/W

Explanation:

The number of squares in an integrated resistor fabricated using the diffused resistor method depends on the ratio of its length (L) to its width (W). This is because the sheet resistance of the diffused layer is characterized in terms of resistance per square, and the total resistance is determined by the number of squares in the resistor, which is proportional to the LW\frac{L}{W}WL​ ratio.