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2007-01-04 16:56:23 · 3 answers · asked by Anonymous in Science & Mathematics Physics

3 answers

isotropic means that the material properties are not direction dependent. in other words, properties like thermal conductivity, electrical conductivity, etc. are the same in all directions throughout the material.

some materials are anisotropic, and their material properties can be different in different directions, i.e. "in-plane" and "out-of-plane".

2007-01-04 16:59:44 · answer #1 · answered by Critical Mass 4 · 1 0

In semiconductor technology isotropic etching is non-directional removal of material from a substrate via a chemical process using an etchant substance. The etchant may be a corrosive liquid or a chemically active ionized gas, known as a plasma.

Isotropic etching is most easily understood by comparison to anisotropic (or non-isotropic) etching. The most important commercial application of anisotropic etching is in semiconductor chip processing, where photolithography is used to print resist lines on silicon wafers. To adequately reproduce very tiny lines (below 0.1 micrometer) into underlying silicon and metal layers on a wafer held in the horizontal plane, the direction of etching must be vertical only. The etchant may not be permitted to spread in the horizontal plane.

Isotropic etching may occur unavoidably, or it may be desirable for process reasons

2007-01-05 01:39:23 · answer #2 · answered by Scarp 3 · 0 1

a metal that is equally strong and stiff in all directions.

2007-01-05 01:01:27 · answer #3 · answered by El C 2 · 0 0

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