Dry adhesives and methods for making dry adhesives

a technology of adhesives and adhesive layers, which is applied in the direction of photomechanical equipment, applications, instruments, etc., can solve the problems of inability to efficiently and controllably produce angled fibers, the microfiber fabrication method described above is very expensive for producing commercial quantities of adhesive materials, and can only etch vertical walls, etc., to achieve the effect of high yield, low cost and low cost of fiber array patch fabrication

Inactive Publication Date: 2012-09-20
CARNEGIE MELLON UNIV
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Benefits of technology

[0011]The present invention provides a method for the fabrication of polymer microfiber arrays with precisely controlled geometry and density through a micromolding process which duplicates lithographically formed master template structures with a desired fiber material. This technique enables fabrication of fiber array patches inexpensively and with high yields. This is a significant advantage with compared to other proposed fibrillar adhesive fabrication techniques [A. K. Geim, S. V. Dubonos, I. V. Grigorieva, K. S. Novoselov, A. A. Zhukov, and S. Y. Shapoval. Microfabricated adhesive mimicking gecko foot-hair. Nature Materials, 2:461-463, 1 Jun. 2003.], [M. T. Northen and K. L. Turner. A batch fabricated biomimetic dry adhesive. Nanotechnology, 16:1159-1166, 2005.], [Y. Zhao, T. T...

Problems solved by technology

But, DRIE can only etch vertical walls even the wafer is tilted.
The microfiber fabrication methods described above are very expen...

Method used

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  • Dry adhesives and methods for making dry adhesives
  • Dry adhesives and methods for making dry adhesives

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Embodiment Construction

[0034]The present invention is directed to dry adhesives and methods for making dry adhesives. The term “dry adhesive”, as used herein, refers generally to individual dry adhesive fibers and also to materials including a plurality of dry adhesive fibers connected together. The combination of a plurality of fibers connected together, such as with a backing layer, will sometimes also be referred to herein as a fiber array. The present invention will also be described in terms of micro- and nanofibers, although the present invention is applicable to a wide variety of sizes and is not necessarily limited to a particular size range. In addition, particular embodiments of the present invention will often describe as using “photoresist”. However, photoresist may be substituted for any energy sensitive material, and energy sensitive material means any material that selectively changes its characteristics when exposed to energy in order to accomplish the methods described in the present inve...

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Abstract

Dry adhesives and methods for forming dry adhesives. A method of forming a dry adhesive structure on a backing material, comprises: forming a template backing layer of energy sensitive material on the backing material; forming a template layer of energy sensitive material on the template backing layer; exposing the template layer to a predetermined pattern of energy; removing a portion of the template layer related to the predetermined pattern of energy, and leaving a template structure formed from energy sensitive material and connected to the substrate via the template backing layer.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]The present invention is a Continuation In Part application of U.S. Non-provisional application Ser. No. 12 / 448,242 entitled “DRY ADHESIVES AND METHODS FOR MAKING DRY ADHESIVES” filed on Aug. 27, 2009, which is a national stage entry of Patent Cooperation Treaty international application serial number PCT / US2007 / 025683, entitled “DRY ADHESIVES AND METHODS FOR MAKING DRY ADHESIVES” filed on Dec. 14, 2007, which claims the benefit of U.S. Provisional Application Ser. No. 60 / 874,850, filed on Dec. 14, 2006, all are incorporated herein by reference.STATEMENT REGARDING FEDERALLY-SPONSORED RESEARCH AND DEVELOPMENT[0002]This invention was made, in part, with government support under Grant Number CNS-0428738 awarded by the National Science Foundation. The United States government may have certain rights in this invention.FIELD OF THE INVENTION[0003]The present invention relates to dry adhesives, and methods for making dry adhesives including, for...

Claims

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Application Information

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IPC IPC(8): B29C71/04B32B3/00B29C35/08B29C33/38B29C41/42C09J7/00
CPCC09J7/00C09J2201/626C09J2205/31Y10T428/24479B81C1/00031B82Y40/00B82Y10/00G03F7/0002B29L2031/757C09J2301/31C09J2301/416B29C33/3857
Inventor SITTI, METINMURPHY, MICHAELAKSAK, BURAK
Owner CARNEGIE MELLON UNIV
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