Patent ID: 6193762
Filing Date: 2001-02-27
Classification: A61F,A61L,C09J,C23F,H05K,Y10S,Y10T

Abstract:
An irregular exterior surface portion on a substrate material which is particularly adapted to be joined to a second material, the surface portion to be so joined comprising a plurality of randomly sized and spaced protrusions located upon said surface portion, produced by the method comprising the steps of:a) masking said surface portion in a random pattern with a maskant material, such that less than the entire surface portion is covered thereby;b) electrochemically etching said surface portion such that said substrate material is removed thereby in areas uncovered by said maskant material, and areas covered by said maskant material are left intact;c) removing said maskant material; andd) repeating said masking, electrochemically etching and removing steps upon said surface portion until a desired surface irregularity is achieved.