Substrates prepared by chemical amplification of self-assembled monolayers with spatially localized polymer brushes

US6780492B2 · kind B2 · utility

Assignees

• International Business Machines Corporation · US
• The Regents of the University of California · US

Inventors

• Craig J. Hawker · Los Gatos, US
• James L. Hedrick · Pleasanton, US
• Nicholas Abbott · Madison, US

Key dates

• Filing date: Feb 11, 2002
• Grant date: Aug 24, 2004
• Expiry date: Mar 13, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/269
• WIPO field: Micro-structural and nano-technology
• WIPO sector: Chemistry

Abstract

A method is disclosed for providing a patterned surface wherein predetermined regions of the surface are masked with a self-assembled monolayer (“SAM”) covalently bound to a brush polymer overlayer. The remainder of the substrate surface will generally be functionalized with a second self-assembled monolayer. Preferably, the method involves a microcontact printing technique, wherein a molecular moiety capable of spontaneously forming an SAM upon transfer to a surface is “stamped” onto a substrate surface, followed by growth (or covalent attachment) of a polymer on exposed functional groups within the SAM molecules. Coverage of surface regions with both an SAM and a polymer overlayer provides a number of advantages, particularly with regard to surface masking during etching and the like. The method is useful in the manufacture of microelectronic circuitry, biosensors, high-density assay plates, and the like.