Assuming a defect density of 0.2 defects cm-2 layer -1, a 5 mask
process,
a die size of 4x4 mm2, 800 chips per wafer and a processing cost of
400
USD per wafer, determine the yield and the cost per chip using the
yield
you have determined.
You are selling 1 Mio. devices for 5 USD each. What is the gross
profit
(i.e. sales price – cost to make the device based calculated above)
you
are obtaining per device and in total for the 1 Mio devices?
| Processing Cost USD | 400 |
| chips per wafer | 800 |
| defect density | 0.2 |
| defect pcs | 160 |
| net chips | 640 |
| net cost per chip | 0.625 |
The processing cost to make the device chips is USD 0.62 per chip. If the company sells 10,00,000 chips, the the gross profit would be = USD 5 - 0.625 = USD 4.375 (Selling Price - Cost Price)
GROSS PROFIT = USD 4.375 X 10,00,000 = 43,75,000 USD
Assuming a defect density of 0.2 defects cm-2 layer -1, a 5 mask process, a die size of 4x4 mm2, 800 chips per wafer and a processing cost of 400 USD per wafer, determine the yield and the cost per ch...