Biaxial-optical polynorbornene-based film and method of manufacturing the same, integrated optical compensation polarizer having the film and method of manufacturing the polarizer, and liquid crystal display panel containing the film and/or polarizer

A method of manufacturing a biaxial-optical polynorbornene-based film, comprising:

• preparing a polynorbornene-based polymer containing composition by dissolving a polynorbornene-based polymer in a mixed solvent containing a high-boiling solvent and a low-boiling solvent, with a difference in boiling points of the two solvents of 20° C. or greater and an amount of the high-boiling solvent being 0.1 to 15 wt % based on a weight of the polynorbornene-based polymer;
• casting and partially drying the composition to obtain a polynorbornene-based film containing 1 to 6 wt % of the mixed solvent based on the total weight of the polynorbornene-based film;
• and
• biaxially stretching the partially dried film in two directions parallel with the surface of the film at a stretching temperature less than or equal to the boiling point of the high-boiling solvent +20° C. and drying the stretched film at a temperature greater than or equal to the boiling point of the high-boiling solvent.