Retardation film and production method for retardation film

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United States of America

PATENT NO 12139570
APP PUB NO 20210032396A1
SERIAL NO

16981693

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Abstract

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A phase difference film composed of a resin C containing a copolymer P including a polymerization unit A and a polymerization unit B, the phase difference film including a lamellar phase separation structure that generates a structural birefringence, the phase separation structure including a phase (A) having the polymerization unit A as a main component and a phase (B) having the polymerization unit B as a main component, and the phase difference film satisfying the formulae (1A): f(A)>0.5 and (2):D(A)>D(B), or the formulae (1B): f(B)>0.5 and (2). f(A) represents a total weight ratio of the polymerization unit A in the copolymer P, f(B) represents a total weight ratio of the polymerization unit B in the copolymer P, D(A)=ReA(450)/ReA(550), D(B)=ReB(450)/ReB(550), and ReA(450), ReA(550), ReB(450) and ReB(550) are as defined in the description.

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Patent Owner(s)

Patent OwnerAddress
ZEON CORPORATION6-2 MARUNOUCHI 1-CHOME CHIYODA-KU TOKYO 1008246 ?1008246

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Asada, Takeshi Tokyo, JP 35 147
Fujii, Kensaku Tokyo, JP 25 360
Nishioka, Hiroya Tokyo, JP 6 8
Sudeji, Hironari Tokyo, JP 15 8
Yasu, Yusuke Tokyo, JP 8 0

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