At half of your Fab25 estimate (or 1500 wpw) + 1000 wpw Fab, the 3.6 M would be acceptable (but not outstanding) yield.
Joe
Sorry Joe, the numbers don't add up. At current die size, each 8 inch wafer can contain greater than 250 die, so:
T-Bird Die Size (Largest Size Athlon Die) = 117 mm2
tomshardware.de
Area of circle (Wafer Surface Area) = pi * Radius squared
3.14 * (100mm) squared
3.14 * 10,000 = 31,400mm
Wafer Area / Die Area = Total Die Per Wafer
31,400 / 117 = 268.37 Die Per Wafer
But let's be fair, and count for partial die, and say 250 Die Per wafer.
Total wafers per quarter:
1500 * 12 = 18,000 Wafers/Quarter F25
1000 * 12 = 12,000 Wafers/Quarter F30
-------------------------------------
30,000 Wafers/Quarter 2 Fabs
30,000 * 250 Die Per Wafer = 7.5 Million Die/Quarter
Assuming 100% Yield of course. So if AMD is claiming 3.6 Million, that would mean a yield of less than 50%.
A yield of 48%, doesn't sound too good to me.
SemiconEng |
