Patent ID: 6946313

Claim:
A method of forming electrodes on first and second respective regions of a semiconductor structure, comprising: a. depositing metal on a surface of a first region of the semiconductor structure; b. forming a patterned mask over the metal on the surface of the first region, the mask having an opening so that a first portion is covered by the mask and a second portion aligned with the opening is left uncovered by the mask by applying a resist on the metal to form a resist layer, and lithographically patterning the resist layer to form the opening over the second region so that the remaining resist layer overlies the semiconductor structure in the first region; c. removing metal aligned with the opening in the second portion thereby defining a first electrode overlying and making electrical contact with the first region of the semiconductor structure; d. removing material of the semiconductor structure aligned with the opening in the second portion to expose a surface of the second region of the semiconductor structure by etching the semiconductor structure while the resist layer remains over the semiconductor structure in the first region; and e. forming a second electrode making electrical contact with the second region of the semiconductor structure.