- Patent Title: Long laminate, method for its production and printed wiring board
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Application No.: US16911492Application Date: 2020-06-25
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Publication No.: US11632859B2Publication Date: 2023-04-18
- Inventor: Wataru Kasai , Tomoya Hosoda , Atsumi Yamabe
- Applicant: AGC Inc.
- Applicant Address: JP Chiyoda-ku
- Assignee: AGC Inc.
- Current Assignee: AGC Inc.
- Current Assignee Address: JP Chiyoda-ku
- Agency: Element IP, PLC
- Priority: JPJP2018-006772 20180118,JPJP2018-078253 20180416,JPJP2018-163696 20180831
- Main IPC: H05K1/03
- IPC: H05K1/03 ; H05K1/09

Abstract:
Provided is a long laminate for a printed wiring board, which has reduced thickness of a resin layer and increased signal transmission speed, and which, while being excellent in dimensional stability and folding endurance, has no wrinkles in a fluororesin layer. The long laminate contains a metal layer of a long metal foil, a fluororesin layer containing a fluororesin and contacting the metal layer, and a heat-resistant resin layer containing a heat-resistant resin and contacting the fluororesin layer. Each fluororesin layer is 1 to 10 μm thick. The ratio of the total thickness of the fluororesin layer to the total thickness of the heat-resistant resin layer is 0.3 to 3.0. The sum of the total thickness of the fluororesin layer and the total thickness of the heat-resistant resin layer is at most 50 μm. Also provided are a method for producing the long laminate, and the printed wiring board.
Public/Granted literature
- US20200329558A1 LONG LAMINATE, METHOD FOR ITS PRODUCTION AND PRINTED WIRING BOARD Public/Granted day:2020-10-15
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