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I doubt that they 2-inch wafers to avoid yield loss from edge effects. The ratio of area to perimeter rises as you increase the wafer size. Perhaps the reasons
by tedsanders 12y ago
I doubt that they 2-inch wafers to avoid yield loss from edge effects. The ratio of area to perimeter rises as you increase the wafer size. Perhaps the reasons they use 2-inch wafers are for better uniformity, better flexibility, or lower capital investment.
- jmpe 12y agoProbably uniformity & capital. The profit margins on LED aren't what they used to be.