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Question 33.1: Number of Chips on a Wafer A 200-mm-diameter silicon wafer h...

Number of Chips on a Wafer

A 200-mm-diameter silicon wafer has a processable area of diameter = 190 mm. The IC chips to be fabricated on the wafer surface are square with 18 mm on a side. How many IC chips can be placed on the wafer?

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n_c=0.34(\frac{190}{18})^{2.25}=0.34(10.56)^{2.25} = 68.3 rounded to 68 chips

Related Answered Questions

Question: 33.3

Yield in Wafer Processing A silicon wafer with a diameter of 200 mm is processed over a circular area whose diameter = 190 mm. The chips to be fabricated are square with 10 mm on a side. From previous experience, the density of point defects in the surface area is 0.002 defects/cm² . Determine ...

Verified Answer:

Using Equation (33.3) , n_c =0.34(\frac{D_w...
Question: 33.2

Rent ’ s Rule The 18-mm square chips in Example 33.1 are microprocessors with a processable area of 17 mm by 17 mm. The density of circuits within each chip ’ s processable area is 500 circuits per mm² . Determine the number of (a) internal circuits that can be placed on each chip and (b) input/ ...

Verified Answer:

(a) The processable area of each chip = (17)² = 28...