Cost Reduction Calculation
This assumes that the extra capacity achieved by improving yield will
be unused. Cost savings are therefore achieved through not processing as
many wafers to achieve required production targets.
- Cost of wafers scrapped
= (100 - DeviceYield)% * WaferStarts * (WaferCost + WaferProcessingCost)
= $ (100 - 80)% * 30000 * (150 + 600) /month
= $ 4500000 /month
-
Amount saved by a reduction of 1% in the number of wafers scrapped
= $ 1% * 4500000 /month
= $ 45000 /month
If Q-YIELD allows you to achieve this target 1% reduction in bad devices,
a typical fab wide installation will pay for itself in terms of reduced
costs in 2.2 months.
Change Parameters
Increased Production Calculation
This assumes that the same number of wafers are processed, and thus more devices
can be sold for the same processing cost.
-
Increased number of devices produced
= WaferStarts * DevicesPerWafer * (100 - DeviceYield)% * LossReduction% /month
= 30000 * 1000 * (100 - 80)% * 1% / month
= 60000 / month
-
Increased profit
= IncreasedNumDevices * DevicePrice /month
= $ 60000 * 5 /month
= $ 300000 /month
If Q-YIELD allows you to achieve this target 1% reduction in bad devices,
a typical fab wide installation will pay for itself in terms of increased
production in 0.3 months.
Change Parameters
