Optically anisotropic film stack including solid crystal and fabrication method thereof

US11675118B2 · kind B2 · utility

Assignee

• Meta Platforms Technologies, LLC · US

Inventors

• Tanya Malhotra · Redmond, US
• Tingling Rao · Bellevue, US
• Liliana Ruiz Diaz · Bothell, US
• Oleg Yaroshchuk · Kyiv, UA
• Sheng Ye · Carlsbad, US
• Andrew John Ouderkirk · Kirkland, US
• Alexander Koshelev · Redmond, US
• Lafe Joseph Purvis, II · Redmond, US
• Junren Wang · Mercer Island, US
• Arman Boromand · Issaquah, US

Key dates

• Filing date: Jun 30, 2021
• Grant date: Jun 13, 2023
• Expiry date: Jun 30, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2323/035
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A film stack includes a plurality of first films and a plurality of second films alternately stacked. At least one second film of the plurality of second films includes a solid crystal including crystal molecules aligned in a predetermined alignment direction. At least one first film of the plurality of first films includes an alignment structure configured to at least partially align the crystal molecules of the solid crystal in the predetermined alignment direction.