Patent ID: 8691131

Claim:
A method for manufacturing a polyimide film having inorganic particles and with a thickness of about 12 μm to about 250 μm, the method comprising: (a) mixing a plurality of inorganic particles with a solvent, and stirring the inorganic particles and the solvent to form a suspending liquid, wherein each of the inorganic particles has a particle size of about 0.1 μm to about 5 μm; (b) mixing and stirring a diamine monomer and a tetracarboxylic dianhydride monomer with the suspending liquid to polymerize the diamine monomer and the tetracarboxylic dianhydride monomer, and thus forming a polyamic acid mixture containing the inorganic particles; (c) coating the polyamic acid mixture on a substrate and then performing a drying process to form a dried layer of polyamic acid mixture on the substrate; (d) separating the dried layer of polyamic acid mixture from the substrate to form a polyamic acid mixture film; and (e) uniaxially stretching and heating the polyamic acid mixture film simultaneously to convert the polyamic acid mixture film into the polyimide film.