Polyimide precursor, manufacturing method thereof, and resin composition using polyimide precursor
View Patent ↗A polyimide precursor in accordance with the present invention contains amide acid ester units, either imide units or amide acid units, and fluorine atoms bonded to some of these structural units. A polyimide precursor resin composition in accordance with the present invention contains either such a polyimide precursor or resins separately containing the structural units. Polyimide precursors in accordance with the present invention and resin compositions based on the same therefore have excellent properties and are suitably used in particular to form a particular pattern and for other purposes by impart photosensitivity to them.
1. A polyimide precursor resin composition, comprising:
a polyamide precursor (A) containing at least one first structural unit (1); and
a polyimaide (B) containing at least one second structural unit (2),
where R 1 is a tetravalent organic group, R 2 is a divalent organic group, R 3 is a monovalent organic group, and m is an integer greater than or equal to 1,
where R 4 is a tetravalent organic group, R 5 is a divalent organic group, and n is an integer greater than or equal to 1,
wherein the polyimide precursor resin composition has positive-type photosensitivity,
wherein the polyimide precursor resin composition contains a photo acid generator within a range of from 0.3 to 50 weight parts per combined 100 weight parts of the polyimide precursor (A) and the polyimide (B), wherein the photo acid generator has the property of producing acid on illumination by light and said property imparting to said polyimide precursor resin composition such positive-type photosensitivity that parts of said precursor resin composition when exposed to said light becomes removable by development with aqueous alkaline solution.
2. The polyimide precursor resin composition as set forth in claim 1 , wherein the photo acid generator is selected from the group consisting of sulfonic acid producing onium salts.
3. The polyimide precursor resin composition as set forth in claim 2 , wherein the sulfonic acid producing onium salts are selected from the group consisting of sulfonic acid producing sulfonium salts and sulfonic acid producing iodoaium salts.
4. The polyimide precursor resin composition as set forth in claim 1 , wherein the photo acid generator is selected from the group consisting of sulfonic acid producing diazonium salts and sulfone producing bis (trichloromethyl) triazines.
5. The polyimide precursor resin composition as set forth in claim 1 , wherein
the photo acid generator is compound (12)
wherein (D) is an organic group identified by formula (13):
6. The polyimide precursor resin composition as set forth in claim 1 , wherein the photo acid generator is naphthoquinone diazide.