Patent ID: 6245687
Filing Date: 2001-06-12
Classification: C25F,H01L

Abstract:
A method for etching GaN material comprising:configuring the GaN material as an anode in first solution having a first chemical composition forming an anodic half an anodic cell potential;providing a cathodic half cell for the anodic half cell in which the cathodic half cell is seperated in space from the anodic half cell and the cathodic half cell comprises a cathode fabricated of a preselected material which is immersed in a second solution having a second chemical composition, the cathodic half cell having a cathodic cell potential;coupling the cathodic and anodic half cells together with an external circuit; and,selecting the chemical composition of each of the first and second solutions and the material of the cathode so that the eletrochemical cell is a galvanic cell which will run spontaneuosly and etch the GaN material.