Patent ID: 6800234
Filing Date: 2004-10-05
Classification: B29C,B29K

Abstract:
A method of making a molded polymeric article, the method comprising:electroforming a plating onto a first surface of a prototype article, wherein the first surface is defined at least in part by a desired arrangement of fine topography features and is electrically conductive, so that the plating defines an article mold having, on a first portion thereof corresponding to the first surface of the prototype article, a reverse image arrangement of the fine topography features thereon; separating the prototype article from the article mold; introducing a polymeric material onto the article mold which flows into and over the reverse image arrangement of fine topography features; curing the polymeric material; and separating the cured polymeric material from the article mold to define a molded polymeric article having, on a finished surface corresponding to the first portion of the article mold, a desired arrangement of fine topography features thereon, wherein at least a portion of the desired arrangement of fine topography features on the finished surface includes an array of upstanding stems, and wherein the array of upstanding stems has a density of at least about 3000 stems per square inch.