Analysis and Characterization of Dye-Based Black Matrix Film of Low Dielectric Constant Containing Phthalocyanine and Perylene Dyes.

For liquid crystal display black matrices of low dielectric constant, greenish zinc phthalocyanine dye and reddish perylene dye exhibiting high solubility and thermal stability were employed to fabricate dye-based black matrices. The spectral, optical, thermal and dielectric properties of the dye-based black matrices were tested, and the surfaces of them were investigated using field emission scanning electron microscopy and atomic force microscopy. The dye-based black matrices had sufficiently low dielectric constants and showed satisfactory thermal stability and weaker light absorption property compared with black matrices containing carbon black, due to the low solubility of the dyes and dye aggregations after a post-baking process.