	US 11,683,977 B2
	Substrate including a self-supporting tri-layer stack
Stephen A. Johnson, Woodbury, MN (US); Derek W. Patzman, Savage, MN (US); Richard Y. Liu, Woodbury, MN (US); John F. Van Derlofske, III, Minneapolis, MN (US); Kristopher J. Derks, Woodbury, MN (US); Victor Ho, St. Paul, MN (US); and Kevin T. Huseby, Oakdale, MN (US)
Assigned to 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Appl. No. 15/733,110
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Nov. 19, 2018, PCT No. PCT/US2018/061731 § 371(c)(1), (2) Date May 19, 2020, PCT Pub. No. WO2019/108423, PCT Pub. Date Jun. 6, 2019.
Claims priority of provisional application 62/592,555, filed on Nov. 30, 2017.
Prior Publication US 2020/0348780 A1, Nov. 5, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. H10K 77/10 (2023.01); B32B 27/36 (2006.01); G06F 3/041 (2006.01); B32B 27/08 (2006.01); H10K 50/00 (2023.01); B32B 7/023 (2019.01)

CPC H10K 77/111 (2023.02) [B32B 27/08 (2013.01); B32B 27/36 (2013.01); G06F 3/041 (2013.01); H10K 50/00 (2023.02); B32B 7/023 (2019.01); B32B 2250/03 (2013.01); B32B 2250/244 (2013.01); B32B 2307/412 (2013.01); B32B 2307/418 (2013.01); B32B 2307/42 (2013.01); B32B 2307/518 (2013.01); B32B 2307/54 (2013.01); B32B 2367/00 (2013.01); B32B 2457/202 (2013.01); B32B 2457/206 (2013.01); B32B 2457/208 (2013.01); G06F 3/0412 (2013.01); G06F 2203/04103 (2013.01); Y02E 10/549 (2013.01); Y10T 428/31786 (2015.04)]

20 Claims

1. A substrate comprising a self-supporting tri-layer stack, the self-supporting tri-layer stack having a thickness in a range of 10 micrometers to 200 micrometers and comprising first and second outer layers and a biaxially oriented layer disposed between and in direct contact with the first and second outer layers, wherein the biaxially oriented layer comprises a first polyester having greater than 45 mole percent naphthalate units and greater than 45 mole percent ethylene units, wherein each of the first and second outer layers comprises a second polyester comprising 40 to 50 mole percent naphthalate units, at least 25 mole percent ethylene units, and 10 to 25 mole percent of branched or cyclic C4-C10 alkyl units, wherein the second polyester comprises no more than 2 mole percent of any carboxylate units other than naphthalate units, wherein the second polyester has a glass transition temperature between 115° C. and 120° C., and wherein the mole percent naphthalate units, the mole percent ethylene units, and the mole percent of branched or cyclic C4-C10 alkyl units add to 100 mole percent for the second polyester, and the mole percent naphthalate units and the mole percent ethylene units add to 100 mole percent for the first polyester.