High refractive index organic solid crystal with controlled surface roughness

US12024793B2 · kind B2 · utility

Assignee

• Meta Platforms Technologies, LLC · US

Inventors

• Tingling Rao · Bellevue, US
• Kimberly Kay Childress · Duvall, US
• Arman Boromand · Issaquah, US
• Lafe Joseph Purvis, II · Redmond, US
• Ehsan Vadiee · Redmond, US
• Namseok Park · Village of La Jolla, US
• Andrew John Ouderkirk · Kirkland, US

Key dates

• Filing date: Feb 22, 2022
• Grant date: Jul 2, 2024
• Expiry date: Oct 7, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2027/0178
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

An organic thin film includes an organic crystalline phase, where the organic crystalline phase defines a surface having a surface roughness (Ra) of less than approximately 10 micrometers over an area of at least approximately 1 cm2. The organic thin film may be manufactured from an organic precursor and a non-volatile medium material that is configured to mediate the surface roughness of the organic crystalline phase during crystal nucleation and growth. The thin film may be formed using a suitably shaped mold, for example, and the non-volatile medium material may be disposed between a layer of the organic precursor and the mold during processing.