Invention Grant
- Patent Title: Method of making wiring boards covered by thermotropic liquid crystal polymer film
- Patent Title (中): 制造热致液晶聚合物膜覆盖线路板的方法
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Application No.: US11996874Application Date: 2006-07-19
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Publication No.: US08771458B2Publication Date: 2014-07-08
- Inventor: Minoru Onodera , Tadao Yoshikawa
- Applicant: Minoru Onodera , Tadao Yoshikawa
- Applicant Address: JP Kurashiki-shi
- Assignee: Kuraray Co., Ltd.
- Current Assignee: Kuraray Co., Ltd.
- Current Assignee Address: JP Kurashiki-shi
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2005-217078 20050727
- International Application: PCT/JP2006/314242 WO 20060719
- International Announcement: WO2007/013330 WO 20070201
- Main IPC: H05K7/20
- IPC: H05K7/20 ; B32B3/00 ; B32B37/04

Abstract:
The object of the invention is to provide a wiring board having the uniform quality at a high yield which is produced by hot-pressing and laminating on a wiring board base material a thermotropic liquid crystal polymer which is excellent as a wiring board covering material.The present invention provides a method of making a wiring board comprising: hot-pressing and laminating a thermotropic liquid crystal polymer film on a wiring board base material on the surface of which at least one layer containing a electro-conductive circuit is exposed, characterized by that a viscoelastic characteristic of the thermotropic liquid crystal polymer film is measured at a low frequency within a laminating temperature region and the hot-pressing is carried out at a temperature selected so that the viscoelastic characteristic falls within a predetermined range.
Public/Granted literature
- US20090065240A1 METHOD OF MAKING WIRING BOARDS COVERED BY THERMOTROPIC LIQUID CRYSTAL POLYMER FILM Public/Granted day:2009-03-12
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