A silicon foundry produced 1.2 million 8-inch wafers in 1997; how many 600 mil die is that? The foundry is scheduled to produce 20,000 12-inch wafers per month by the year 2001 using a 0.25 micronmeter process.
If a 16Mb SRAM yields 850 good die per 12-inch wafer and there are 1300 die per wafer, what is the yield and the die size? If the SRAM cell size is 2 micronmeter^{2} what fraction of the die is used by the cells and what is the cost per bit if the wafer cost is $3,000? A 64Mb DRAM uses the same fabline on a 25mm^{2} die; calculate the cost per bit for DRAM assuming the same yield.