is one form of etching where it takes place in all directions. The sides of the etch balloon creates a concave shape under the photoresist etching mask rather than a straight plasma etch
that is achieved through anisotropic etching
. Since most applications such as the production of printed circuit boards require anisotropic etching, isotropic etching
does not have as many applications or advantages. However, isotropic etching
is often used to remove material from a large surface and to clean circuits prior to electroplating.