Patent ID: 7676905

Claim:
A method for manufacturing a product on a wafer, comprising: depositing a first device material layer on the wafer; forming a first mask structure on the first device material layer, the first mask structure comprises a layer of material that is resistant to removal by chemical mechanical polishing to form a CMP resistant layer and a layer of material that is resistant to removal by chemical mechanical polishing and reactive ion etching to form a RIE resistant layer, the RIE resistant layer being deposited after the CMP resistant layer; removing a portion of the first device material layer not protected by the first mask structure; depositing a second device material layer and a second CMP resistant layer; after depositing the second device material layer, performing the chemical mechanical polishing, at least a portion of the CMP resistant layer, the RIE resistant layer, and the second CMP resistant layer, are remaining intact after the chemical mechanical polishing; forming a second mask structure, the second mask structure covering an area different than that covered by the first mask structure; performing reactive ion etching to remove portions of the second CMP resistant layer that are not protected by the second mask structure; and removing portions of the second device material layer not covered by either of the first and second mask structures.