Metal laminate for a circuit board
AssigneeKuraray Co., Ltd.
InventorsMinoru Onodera, Tadao Yoshikawa, Takeichi Tsudaka, Toshiaki Sato
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Abstract
A method of producing a metal laminate for a circuit board includes a first step of press-bonding a thermotropic liquid crystal polymer film 1 having a segment orientation ratio SOR within a range not smaller than 0.90 and smaller than 1.15 along the longitudinal direction of the film, to a metal sheet 3 between hot rolls while the thermotropic liquid crystal polymer film 1 is in a tense or non-tense state; and a second step of heating the laminate obtained in the first step to a temperature not lower than the melting point of the thermotropic liquid crystal polymer film.
Claims18
A method of producing a metal laminate for a circuit board, the method comprising
- press-bonding between hot rolls a thermotropic liquid crystal polymer film in a tense state to a metal sheet at a temperature not higher than the melting point of the film to form a first laminate, where
- the film is capable of forming an optically anisotropic melt phase and
- the film has a segment orientation ratio SOR within a range not smaller than 1.03 and smaller than 1.15 along a longitudinal direction of the film;
- and,
- after the press-bonding, heating the first laminate to a temperature not lower than the melting point of the film.
A method of producing a metal laminate for a circuit board, the method comprising
- press-bonding between hot rolls a thermotropic liquid crystal polymer film in a non-tense state to a metal sheet at a temperature not higher than the melting point of the film to form a first laminate, where
- the film is capable of forming an optically anisotropic melt phase and
- the film has a segment orientation ratio SOR within a range not smaller than 0.90 and smaller than 1.03 along a longitudinal direction of the film;
- and,
- after the press-bonding, heating the first laminate to a temperature not lower than the melting point of the thermotropic liquid crystal polymer film.
Dependencies are inferred from the claim text.