Polymer microwedges and methods of manufacturing same

US10791779B2 · kind B2 · utility

Assignee

• The Charles Stark Draper Laboratory, Inc. · US

Inventors

• David J. Carter · Concord, US
• Tirunelveli Subramaniam Sriram · Acton, US
• Parshant Kumar · Cambridge, US
• Clayton Morris · Norfolk, US
• William W. McFarland · Spartanburg, US
• Eugene H. Cook · Acton, US
• John LeBlanc · North Andover, US
• Alla Gimbel · Medford, US

Key dates

• Filing date: Dec 9, 2015
• Grant date: Oct 6, 2020
• Expiry date: Nov 12, 2036

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29L2031/4864
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A mold for casting a micro-scale structure includes an upper surface including a first cavity having a first depth. A negative pattern for an array of micro-scale structures is defined in a surface of the first cavity. The mold includes at least one second cavity having a second depth defined in the cavity outside of the negative pattern for the array of micro-scale structures. The at least one second cavity defines a negative pattern for a standoff of the micro-scale structure. A fabric retaining frame is disposed in the first cavity.