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    • 4. 发明申请
    • Novel Polyimide Film
    • 新型聚酰亚胺膜
    • US20070221096A1
    • 2007-09-27
    • US11571334
    • 2005-06-21
    • Kan FujiharaKazuhiro OnoTakaaki Matsuwaki
    • Kan FujiharaKazuhiro OnoTakaaki Matsuwaki
    • C08J5/12
    • H05K1/0346B32B15/08B32B27/281B32B27/34B32B2307/734B32B2429/02B32B2457/08C08J5/18C08J2379/08H05K1/0393H05K2201/0154H05K2203/1545
    • A polyimide film that can provide a flexible metal-clad laminate plate which causes no significant dimensional change upon etching of the metal layer. The polyamide film is characterized in that, in the whole width of a continuously produced polyimide film, the ratio of the coefficient of humidity expansion (b) in a direction perpendicular to a molecular orientation axis and the coefficient of humidity expansion. (a) in the direction parallel to the molecular orientation axis, i.e., b/a, is not less than 1.01 to not more than 2.00 and the difference between the maximum value of the coefficient of humidity expansion ratio and the minimum value of the coefficient of humidity expansion ratio is not more than 0.30. The polyimide film in another aspect is characterized in that the coefficient of humidity expansion in a direction parallel to the molecular orientation axis is not less than 3.0 ppm/° C. and not more than 15.0 ppm/% RH, the difference between the maximum value and the minimum value for the molecular orientation angle of the film is not more than 40°, and the molecular orientation angle is regulated within 0±20° when MD direction is 0°.
    • 一种聚酰亚胺膜,其可以提供在金属层蚀刻时不会引起显着的尺寸变化的柔性覆金属层压板。 聚酰胺薄膜的特征在于,在连续制造的聚酰亚胺薄膜的整个宽度上,垂直于分子取向轴的方向上的湿度膨胀系数(b)与湿度膨胀系数之比。 (a)在与分子取向轴平行的方向上,即b / a为1.01以上且2.00以下,湿度膨胀系数的最大值与系数的最小值之差 的湿度膨胀率不大于0.30。 另一方面的聚酰亚胺膜的特征在于,在与分子取向轴平行的方向上的湿度膨胀系数为3.0ppm /℃以上且15.0ppm / RH以下,最大值 并且膜的分子取向角的最小值不大于40°,当MD方向为0°时,分子取向角被调节在0±20°内。