公开(公告)号：US20200348780A1

公开(公告)日：2020-11-05

申请号：US15733110

申请日：2018-11-19

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Stephen A. Johnson ,  Derek W. Patzman ,  Richard Y. Liu ,  John F. Van Derlofske ,  Kristopher J. Derks ,  Victor Ho ,  Kevin T. Huseby

IPC: G06F3/041 ,  H01L51/00 ,  H01L51/50

Abstract: A substrate including a self-supporting tri-layer stack is described. The tri-layer stack includes first and second outer layers and a biaxially oriented layer disposed between and in direct contact with the first and second outer layers. The biaxially oriented layer may include a first polyester having greater than 45 mole percent naphthalate units and greater than 45 mole percent ethylene units. Each of the first and second outer layers includes a second polyester which may include 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.