Patent ID: 6663784
Filing Date: 2003-12-16
Classification: B81C

Abstract:
A method for producing a three-dimensional structure in a substrate using an etching process according to a first etching removal rate and a second etching removal rate, at least one of the first etching removal rate and the second etching removal rate being changeable as a function of time, the method comprising the steps of:initially providing in a plurality of places on the substrate at least one original shape including a known original surface shape; converting the at least one original shape by the etching process into a target shape having a target surface shape that is different from the known original surface shape; calculating at least one etching parameter as a function of an etching time before a beginning of the etching process, the at least one etching parameter being calculated from the known original surface shape and the target surface shape; and setting at least one of the first etching removal rate and the second etching removal rate via a change of the at least one etching parameter in order to achieve during the etching process the target surface shape.