Alternately you can use 1 the probability of

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Unformatted text preview: /5610 Assignment 1 Answers 1 1.3b If the old chip cost $20 per chip, what will be the cost of the new chip, taking into account the new area and yield. Using the equation to determine the cost of a die with respect to the cost of a wafer, dies per wafer and die yield. D$ = W$ / (# dies * DY) Since we are using the same process on the same size wafers the cost of a wafer, W$, is a constant and we can express that using the other terms for the old die size, cost, yield and setting that equal to the new die size, cost, yield and solving for the new die cost. W$ = old D$ * old # dies * old DY = new D$ * new # dies * new DY New D$ = old D$ * old # dies * old DY/(new # dies * new DY) You could make assumptions about wafer size and compute the number of die per wafer or you could assume that the wafer is sufficiently larger than the die, that doubling the die size will produce the die per wafer. If you assume a wafer size, make certain that it is at least 10 times the size of one edge of the die to get reasonable results. Here I will assume (old # dies / new # dies) = 2.0. New D$ = $20 * 2 * 0.2813 / 0.7545 = 23.27 If you assumed no change in die size, then the die count is constant and the equation is: New D$ = $20 * 0.2813 / 0.7545 = 11.64 CSCE 4610/5610 Assignment 1 Answ...
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This note was uploaded on 05/21/2012 for the course CSCE 4610 taught by Professor Kavi during the Spring '12 term at North Texas.

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