Durable antireflective film

US8137801B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Christopher B. Walker, Jr. · Windom, US
• Marc D. Radcliffe · Woodbury, US
• Thomas P. Klun · Lakeland, US
• Lan H. Liu · Windom, US
• Richard J. Pokorny · Maplewood, US
• William D. Coggio · Hudson, US
• Chuntao Cao · Woodbury, US
• Mark J. Pellerite · Woodbury, US
• Paul C. Kelley · San Francisco, US
• Robert J. Fleming · San Jose, US

Key dates

• Filing date: Jun 6, 2007
• Grant date: Mar 20, 2012
• Expiry date: Jan 20, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31935
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Antireflective films are described having a surface layer comprising a the reaction product of a polymerizable low refractive index composition comprising at least one fluorinated free-radically polymerizable material and surface modified inorganic nanoparticles. A high refractive index layer is coupled to the low refractive index layer. In one embodiment, the high refractive index layer comprises surface modified inorganic nanoparticles dispersed in a crosslinked organic material. The antireflective film is preferably durable, exhibiting a haze of less than 1.0% after 25 wipes with steel wool using a 3.2 cm mandrel and a mass of 1000 grams.