Patent ID: 8318248
Filing Date: 2012-11-27
Classification: B01J,C23C

Abstract:
1. A method for preparing a substrate, comprising: providing an atomic layer deposition (ALD) system; providing a substrate, the substrate having at least one external surface, wherein the at least one external surface can be at least one of planar and a complex topography including folds, and including a plurality of nanopores each having a pore surface and the nanopores extending from the at least one external surface comprising the at least one of planar and the complex topography, where the pores can be oriented at any angle with respect to the local surface normal, and can be at least one of straight or tortuous such that the pore surface can be oriented at any angle with respect to the local surface normal, thereby having no line-of-sight access relative to the local surface normal, and where the nanopores have an aspect ratio, A=L/d greater than 89 where L is the pore length and d is the pore diameter; providing a first gaseous precursor reactive with at least a portion of the substrate; providing a second gaseous precursor reactive with at least a portion of the substrate, and substantially not reactive with the first precursor; exposing the substrate to the first precursor within the ALD system for a first predetermined period, the first precursor reacting with a first surface portion of one or more of the plurality of nanopores and reacting regardless of the angle of the nanopores with the local surface normal and thereby depositing a mask on the first surface portion; exposing the substrate to the second precursor within the ALD system for a second predetermined period, the second precursor reacting with a second surface portion of one or more of the plurality of nanopores and reacting regardless of the angle of the pore with the local surface and further all the second precursor remaining with the substrate; and wherein the mask substantially prevents reaction of the second precursor with the first surface portion, thereby providing a desired chemical functionality for the first and second surface portions of the nanopores.