Polyimide precursor composition and optical multilayer structure formed using the same

An optical multilayer structure comprising:

• an ultrathin tempered glass (UTG) substrate;
• a shatterproof layer which is formed on the substrate and comprises a polyimide film formed from a polyimide precursor composition comprising:
• a polyimide precursor comprising a unit derived from an acid anhydride or a diamine comprising a structure of the following Chemical Formula 1, a unit derived from an acid anhydride represented by the following Chemical Formula 4, and inorganic particles;
• and
• a hard coating layer formed on the shatterproof layer;
• wherein
• R1 and R2 are independently of each other C1-5 alkyl which is unsubstituted or substituted with one or more halogens;
• R3 and R4 are independently of each other C6-10 aryl which is unsubstituted or substituted with one or more halogens;
• L1 and L2 are independently of each other C1-10 alkylene;
• and
• x and y are independently of each other an integer of 1 or more,
• wherein X1 is independently of each other a C3-10 aliphatic ring or a C4-10 aromatic ring, and Y1 is a linker comprising a single bond, a substituted or unsubstituted C1-20 aliphatic chain, a substituted or unsubstituted C3-10 aliphatic ring and/or a substituted or unsubstituted C4-10 aromatic ring, and specifically, Y1 may comprise two or more C4-10 arylene linked by C1-20 alkylene, C1-10 alkylene, C1-5 alkylene, C3-10 cycloalkylene, C4-10 arylene, two or more C3-10 cycloalkylenes linked by C1-20 alkylene, or two or more C4-10 arylene linked by C1-20 alkylene, and
• wherein a curl amount of opposing ends of the polyimide film formed from the polyimide precursor composition on a surface of the ultrathin tempered glass (UTG) substrate is 3.0 mm or less, wherein the curl amount is calculated as an average value of the values measured at each of the opposing ends.

A method of manufacturing an optical multilayer structure, the method comprising:

• applying a polyimide precursor composition comprising:
• a polyimide precursor comprising a unit derived from an acid anhydride or a diamine comprising a structure of the following Chemical Formula 1, a unit derived from an acid anhydride represented by the following Chemical Formula 4, and inorganic particles on a substrate and drying the composition to form a shatterproof layer;
• and
• applying the composition for forming a hard coating layer on the shatterproof layer and curing the composition to form a hard coating layer:
• wherein
• R1 and R2 are independently of each other C1-5 alkyl which is unsubstituted or substituted with one or more halogens;
• R3 and R4 are independently of each other C6-10 aryl which is unsubstituted or substituted with one or more halogens;
• L1 and L2 are independently of each other C1-10 alkylene;
• and
• x and y are independently of each other an integer of 1 or more,
• wherein X1 is independently of each other a C3-10 aliphatic ring or a C4-10 aromatic ring, and Y1 is a linker comprising a single bond, a substituted or unsubstituted C1-20 aliphatic chain, a substituted or unsubstituted C3-10 aliphatic ring and/or a substituted or unsubstituted C4-10 aromatic ring, and specifically, Y1 may comprise two or more C4-10 arylene linked by C1-20 alkylene, C1-10 alkylene, C1-5 alkylene, C3-10 cycloalkylene, C4-10 arylene, two or more C3-10 cycloalkylenes linked by C1-20 alkylene, or two or more C4-10 arylene linked by C1-20 alkylene, and
• wherein a curl amount of opposing ends of a polyimide film formed from the polyimide precursor composition on a surface of an ultrathin tempered glass (UTG) substrate is 3.0 mm or less, wherein the curl amount is calculated as an average value of the values measured at each of the opposing ends.