The liquid crystal display(LCD) uses a liquid crystal(LC) having dielectric anisotropy and birefringence characteristics to adjust transmittance to display an image. One of the LCD modes, vertical alignment (VA) for LCs is widely applied to large screen displays because it offers advantages such as high contrast ratio, excellent dark states. However, VA mode is operated by the two-step movement of LC molecule at the applied voltage, so there is disadvantage that the response time is slow. In this study, as a solution to this problem, reactive monomer(RM) molecules were confined to the PI layer and photopolymerized under UV exposure to create pre-tilt angles. The response characteristics of the photoreactive alignment layer according to the types of core and functional groups of the RM were compared. As a result, a uniform stable vertical alignment layer was formed and a high performance LC device with fast response time was manufactured.