摘要:
A two-step adsorption process for producing ordered organic/inorganic multilayer structures is provided. Multilayered films are formed on metallic and nonmetallic substrates by alternate adsorption of a cationic polyelectrolyte and anionic sheets of a silicate clay. The two-step adsorption process is not only fast but allows also for preparation of multilayer elements of thicknesses greater than about 2200 Angstroms on silicon, and greater than about 1500 Angstroms on gold, silver, and copper.
摘要:
A method for planarizing a layer (18) begins by forming a layer (18) over a wafer having a substrate (12). Layer (18) has a surface topography which is not planar. A layer of material (20) is formed over the layer (18). The layer of material (20) has a surface which is more planar than the surface of layer (18). The surface of material (20) is transferred into the layer (18) by etching the layer (18) and the material (20) at approximately the same etch rate. The same etch rate is achieved by monitoring one of either the surface of the wafer or the etch environment of an etch system chamber. A computer-controlled feedback path alters an etch chemistry or etch environment to maintain the etch rates within an etch rate tolerance which is also referred to as a process window. By monitoring and altering the etch environment and/or the etch chemistry to maintain a process window, an optimal planar surface is achieved for layer (18).
摘要:
A two-step adsorption process for producing ordered organic/inorganic multilayer structures is provided. Multilayered films are formed on metallic and nonmetallic substrates by alternate adsorption of a cationic polyelectrolyte and anionic sheets of a silicate clay. The two-step adsorption process is not only fast but allows also for preparation of multilayer elements of thicknesses greater than about 2200 Angstroms on silicon, and greater than about 1500 Angstroms on gold, silver, and copper.
摘要:
A method of forming a porous silica film includes the following steps: a) providing a substrate; b) coating, on a surface of the substrate, a layer of charged polyelectrolyte; and c) applying an aged silica-bearing non-colloidal solution to the coated surface of the substrate to adsorb porous silica thereon. The adsorption cycle of steps (b) and (c) is repeated a number of times to control film thickness. The age and concentration of the silica-bearing solution are selected to control the porosity and the index of refraction of the porous silica film.
摘要:
Disclosed is a method of preparing self-assembled monolayers on a metal comprising electrolyzing a thiosulfate compound in a solvent, where the electricity for the electrolysis is applied at a voltage for a period of time.
摘要:
Beveled clamp fingers (48) are used in an etching system. The beveled top surfaces (40) of the clamp fingers allow etching species to attack more readily the layer being etched at locations near the beveled clamp fingers (48), thereby reducing the size of halo regions (622). In other embodiments, triangular clamp fingers (78) or clamp fingers (88) with rounded top surfaces can be used.