Optical polyimide precursor, optical polyimide compound and fabricating method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsKyung-Hee You, Kwan-Soo Han, Tae-Hyung Rhee, Eun-Ji Kim, Jung-Hee Kim, Woo-Hyeuk Jang
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Abstract
The present invention provides an optical polyimide compound defined by the following formula in an optical high polymer material: wherein X is Cl, Br, oxo-halide, or fully halogenated alkyl; A is a divalent aromatic or halogenated aromatic moiety; and Z is a tetravalent moiety which may be a partly or fully fluorinated aromatic ring, a partly or fully chlorinated aromatic ring, a partly or fully fluorinated cycloaliphatic group, a partly or fully chlorinated aliphatic group, or combinations thereof connected via hetero atoms.
Claims18
A polyimide for use as an optical polymer, said polyimide comprising a first unit having structure:
- wherein A represents a divalent aromatic moiety;
- X is selected from Cl, Br and halogenated alkyl;
- and
- Z is a tetravalent moiety comprising an aromatic group, a cycloaliphatic group or an aliphatic group.
A method of preparing an optical polyimide compound, comprising the steps of:
- dissolving a diamine compound and a dianhydride compound in approximately equimolar ratios in N,N-dimethylacetamide, said diamine compound having the formula:
- where A represents a divalent aromatic moiety and X is selected from Cl, Br and fully halogenated alkyl;
- and said dianhydride compound having the formula:
- where Z is a tetravalent moiety comprising an aromatic group, a cycloaliphatic group or an aliphatic group;
- stirring the solution of the diamine and dianhydride under nitrogen to form a polyamic acid solution;
- coating a silicon substrate with the polyamic acid solution;
- and
- heat-treating the coated silicon substrate to convert the polyamic acid to a polyimide.
A method of preparing an optical polyimide compound, comprising the steps of:
- dissolving two different diamine compounds and a dianhydride compound in N,N-dimethylacetamide in approximately equimolar ratio of the diamine compounds to the dianhydride compound, each of said diamine compounds having the formula:
- where A represents a divalent aromatic moiety and X is selected from Cl, Br and fully halogenated alkyl;
- and said dianhydride compound having the formula:
- where Z is a tetravalent moiety comprising an aromatic group, a cycloaliphatic group or an aliphatic group;
- stirring the solution of the diamine and dianhydride under nitrogen to form a polyamic acid solution;
- coating a silicon substrate with the polyamic acid solution;
- and
- heat-treating the coated silicon substrate to convert the polyamic acid to a polyimide.
Dependencies are inferred from the claim text.