Question

Calculate an estimate of the number of 20-mm x 20-mm dice on a 300-mm diameter wafer, in terms of the total wafer and die areas. 3. A certain silicon gate NMOS transistor occupies an area of 2512, where is the minimum lithographic feature size.

(a) How many MOS transistors can fit on a 5 x 5 mm die if h = 1 um?
(b) 0.25 um?
(c) 0.10 um?
(d) What is the inference when the feature size is decreased?

Answer 1

To estimate the number of 20-mm x 20-mm dice on a 300-mm diameter wafer, divide the total wafer area by the area of a single die.

Step-by-step explanation:

To calculate the estimate number of 20-mm x 20-mm dice on a 300-mm diameter wafer, we first need to find the area of the wafer and the area of a single die. The area of a wafer can be found using the formula for the area of a circle: A = πr^2, where r is the radius of the wafer. Since the diameter is given as 300 mm, the radius is half of that, which is 150 mm. Plugging this value into the formula, we find that the area of the wafer is approximately 70685.8 mm^2.

The area of a single die is given by the formula A = length x width. Since the length and width are both given as 20 mm, the area of a single die is 400 mm^2.

To estimate the number of dice on the wafer, we can divide the total wafer area by the area of a single die. This gives us an estimate of approximately 176.7 dice on the wafer.