Method for producing undercut surface recesses

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/28 (2006.01) A61F 2/30 (2006.01) C23F 1/02 (2006.01) A61C 8/00 (2006.01) A61F 2/00 (2006.01) A61F 2/32 (2006.01) A61F 2/38 (2006.01)

Patent

CA 2435914

Method for producing a multiplicity of undercut micro recesses in a surface (12) of an article (10), such that the article exhibits a greater fractal area at a level below the surface than is exhibited at the surface (12). The method comprises applying a maskant layer to a selected surface of the article (10), removing the maskant layer in selected loci to expose underlying portions of the article surface in a selected pattern, applying an etchant to the exposed underlying surface portions for a time sufficient to etch the exposed portions of the article (10) and to enable the etchant to etch beneath portions of the remaining maskant layer, and removing the remaining maskant layer to provide the surface in exposed condition with the multiplicity of undercut recesses, to provide an engineered pattern of the recesses.

L'invention concerne un procédé permettant de produire une multitude de microévidements de dégagement sur la surface d'un article, ce dernier présentant alors une zone fractale au-dessous de la surface plus grande que celle présentée à la surface. Le procédé consiste à appliquer une couche masquante sur une surface choisie de l'article, à enlever la couche masquante des emplacement choisis afin d'exposer des parties sous-jacentes de la surface de l'article dans un motif choisi, à appliquer un agent de gravure aux parties exposées de la surface sous-jacente pendant une durée suffisante pour graver les parties exposées de l'article et permettre à l'agent de gravure de graver les parties sous la couche masquante restante, et à enlever la couche masquante restante afin de présenter la surface dans un état exposé avec la multitude d'évidements de dégagement, de façon à produire un motif technique des évidements.

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