US 12,031,228 B2
Organic solid crystal—method and structure
Tingling Rao, Bellevue, WA (US); Kimberly Kay Childress, Duvall, WA (US); Arman Boromand, Issaquah, WA (US); Tanya Malhotra, Robbinsdale, MN (US); Lafe Joseph Purvis, II, Redmond, WA (US); Taha Masood, Sammamish, WA (US); Poer Sung, Woodinville, WA (US); and Andrew John Ouderkirk, Kirkland, WA (US)
Assigned to Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed by META PLATFORMS TECHNOLOGIES, LLC, Menlo Park, CA (US)
Filed on Mar. 23, 2022, as Appl. No. 17/702,219.
Claims priority of provisional application 63/224,303, filed on Jul. 21, 2021.
Prior Publication US 2023/0034754 A1, Feb. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C30B 29/54 (2006.01); C30B 13/06 (2006.01); G02B 1/08 (2006.01)
CPC C30B 13/06 (2013.01) [C30B 29/54 (2013.01); G02B 1/08 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method comprising:
forming a layer of a non-volatile medium material over a surface of a mold;
forming a layer of a molecular feedstock over a surface of the non-volatile medium material, the molecular feedstock comprising an organic solid crystal precursor;
forming crystal nuclei from the organic solid crystal precursor; and
growing the crystal nuclei to form a biaxially-oriented organic solid crystal thin film having mutually orthogonal refractive indices, n1≠n2≠n3, wherein in-plane refractive indices (n2, n3) of the biaxially-oriented organic solid crystal thin film are related according to |n2−n3|>0.05.