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Science
Math and Arithmetic
Geometry

What is a planar surface?

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February 18, 2011 5:14PM

In mathematics, a plane is any flat, two-dimensional surface.

A planar surface means that the surface of a material is straight in two dimensions, an example would be a perfectly flat smooth piece of glass. If an etch or chip is on the glass surface, or if the glass is heated and curves, then it is no longer a planar surface.

Semiconductor fabrication requires the wafer to be a planar surface.