Patent ID: 7410907

Claim:
A method of fabricating an integrated device, comprising: (A) forming first and second embedded masks in a multi-layer wafer, each of said masks in contact with one or more layers of the wafer, wherein (i) the first embedded mask is in contact with a first layer of the wafer and (ii) the second embedded mask is in contact with a second different layer of the wafer; and (B) etching, using a first etchant, a portion of the first layer and a portion of the second layer from the wafer, wherein: the first embedded mask protects one or more other portions of the first layer from being removed by the first etchant during the etching; the second embedded mask protects one or more other portions of the second layer from being removed by the first etchant during the etching; and the first etchant is capable of removing material of the portions being protected by the first and second embedded masks.