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Why are wafers round? Is there a part of the process that requires spinning the wafer?
by bmalicoat 17y ago
Why are wafers round? Is there a part of the process that requires spinning the wafer?
- jlangenauer 17y agoI believe its because the wafers are actually sliced of a single large crystal of silicon, which grows in a circular cross-section. http://en.wikipedia.org/wiki/Wafer_(electronics) http://en.wikipedia.org/wiki/Wafer_(electronics)
- jonsen 17y agoYes, wafers are spun during processing. Saw a video long time ago. Liquid photoresist is dropped on the wafer. It's then spun to even out the layer.