We optimized fabrication conditions of cholesteric liquid crystal (CLC) films; 1) amount of photo-initiator, 2) exposure conditions. Based on these conditions, we could succeed in fabricating broadband CLC films with Delta lambda approximate to 250 nm. We also examined the spatial helical pitch gradient structure fabricated here using a field emission-scanning electron microscope (FE-SEM) at a freeze-fractured cross-section of the fabricated CLC films.