Hitachi Chemical Dupont Microsystems, Ltd.

Yumiko Arakawa

Keiko Suzuki

Yuichi Kaneya

The polyimide precursor composition of the present invention is characterized in comprising a polyimide precursor having a structure formed by reacting a diamine component (A) containing a fluorine-containing aromatic diamine (a1) represented by the following chemical formula (I) (in the formula (I), Rand Rare each independently selected from &#x2014;H, &#x2014;(CF)&#x2014;CF, and &#x2014;O(CF)&#x2014;CF(n is an integer of 0 or more and 7 or less), and at least one of Rand Ris a fluorine-containing group) and trans-1,4-cyclohexyldiamine (a2) with an acid dianhydride component (B) containing an aliphatic tetracarboxylic dianhydride (b1) and an aromatic tetracarboxylic dianhydride (b2). Use of the composition of the present invention provides a polyimide film and a transparent flexible film having high transparency, low thermal expansion properties, low birefringent properties, and high heat resistance.

Growing community of inventors

Ibaraki, Japan

Yumiko Arakawa