광학 이방성 중합체 박막 및 이를 제조하기 위한 방법

• Main Authors: MEI HAO, BOROMAND ARMAN, LOPER ASHLEY NICOLE, OUDERKIRK ANDREW JOHN, YE SHENG, MULLEN EMMA RAE, MARTIN WARREN SCOTT, LIAO CHRISTOPHER YUAN TING
• Format: Patent
• Language: Korean
• Published: 12.06.2023
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

중합체 박막은 제1 면내 굴절률(nx)과 제2 면내 굴절률(ny)을 갖는 중합체 층을 포함하고, 여기서 nx > 1.8이고 (nx-ny) > 0.1이다. 또한, 방법은, 클립 어레이를 중합체 박막의 대향하는 에지들에 부착하는 단계, 제1 클립과 제2 클립 사이의 거리를 증가시켜 중합체 박막에 가로 방향을 따라 양의 면내 변형(positive in-plane strain)을 인가하는 단계; 및 면내 변형을 인가하여 광학 이방성 중합체 박막을 형성하면서, 기계 방향을 따라 제1 클립 간의 그리고 제2 클립 간의 클립간 간격을 감소시키는 단계를 포함하고, 면내 변형을 인가하는 단계 동안, 방법은 기계 방향을 따른 중합체 박막의 위치의 함수로서 중합체 박막의 온도를 증가시키는 단계 및 중합체 박막의 변형률을 감소시키는 단계 중 적어도 하나를 더 포함한다. A method includes attaching a clip array to opposing edges of a polymer thin film, the clip array having a plurality of first clips slidably disposed on a first track located proximate to a first edge of the polymer thin film and a plurality of second clips slidably disposed on a second track located proximate to a second edge of the polymer thin film, applying a positive in-plane strain to the polymer thin film along a transverse direction by increasing a distance between the first and second clips, and decreasing an inter-clip spacing amongst the first clips and amongst the second clips along a machine direction while applying the in-plane strain to form an optically anisotropic polymer thin film. During stretching, a strain rate of the thin film may be decreased and/or a temperature of the thin film may be increased.