The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 2011
Filed:
May. 14, 2008
James W. Adkisson, Jericho, VT (US);
John J. Ellis-monaghan, Grand Isle, VT (US);
Jeffrey P. Gambino, Westford, VT (US);
Charles F. Musante, South Burlington, VT (US);
James W. Adkisson, Jericho, VT (US);
John J. Ellis-Monaghan, Grand Isle, VT (US);
Jeffrey P. Gambino, Westford, VT (US);
Charles F. Musante, South Burlington, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Protuberances, having vertical and lateral dimensions less than the wavelength range of lights detectable by a photodiode, are formed at an optical interface between two layers having different refractive indices. The protuberances may be formed by employing self-assembling block copolymers that form an array of sublithographic features of a first polymeric block component within a matrix of a second polymeric block component. The pattern of the polymeric block component is transferred into a first optical layer to form an array of nanoscale protuberances. Alternately, conventional lithography may be employed to form protuberances having dimensions less than the wavelength of light. A second optical layer is formed directly on the protuberances of the first optical layer. The interface between the first and second optical layers has a graded refractive index, and provides high transmission of light with little reflection.