SELECTED AREA ADHESION AND SURFACE PASSIVATION OF METAL FILMS

摘要

A thin film device having a selectively passivated surface (16) is provided. An embodiment of the device is particularly suited to detection of chemical constituents by selective adsorption, where the selectively passivated surface (16) is inert to the chemical constituent being detected. A method of fabrication of the device is also provided in which the selective passivation is achieved by selectively applying the metallic adhesive (14) to the substrate (12). The migration of the metallic adhesive (14) through the thin film layer (16) is essentially normal to the surface of the substrate (12), thereby limiting the passivation of the thin film layer (16) to the surface areas directly overlying the metallic adhesive (14).