| United States Patent | 5,792,411 |
| Morris, et. al. | Aug. 11, 1998 |
The invention relates to a method of manufacturing a replication master tooling article suitable for manufacturing replicated articles by machining a substrate surface with laser energy to produce a plurality of geometric structures in the substrate, the geometric structures having side surfaces extending from the surface of the substrate into the substrate.
| Inventors: | Morris; Terry L. (Eagan, MN); Fox; Herbert J. (Maplewood, MN); Hanschen; Thomas P. (St. Paul, MN); Miller; Philip (Eagan, MN). |
| Assignee: | Minnesota Mining and Manufacturing Company (St. Paul, MN). |
| Appl. No.: | 535,608 |
| Filed: | Sept. 28, 1995 |
| Continuation of (including streamline cont.) Ser. No. 76,316, Jun. 11, 1993, abandoned. |
| Intl. Cl. : | B28B 7/20 |
| Current U.S. Cl.: | 264/400; 219/121.69; 264/219; 264/482; 425/174.4 |
| Field of Search: | 264/219, 220, 400, 482, 167, 210.1, 210.2; 219/121.67, 121.68, 121.69; 425/174.4, 175 |
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