레이저 가열을 이용한 LCD 컬러 필터 프린팅 공정에 관한 연구

A Study on LCD Color Filter Printing Process Using Localized Laser Heating

  A new printing process for LCD color filter is proposed in this work by using the localized laser heating, which is called laser-induced spray printing (LISP) process. The LISP is a non-contact process, which injects the ink from the donor substrate to the glass substrate by the bubble pressure induced by laser heating. The temperature distribution of the donor substrate is calculated numerically to explain the ink ejection phenomena. The ink was made by mixing the various compositions, which included red pigment, n-butanol, xylene, BCA and epoxy. Experiments were conduced by using the fiber laser system, and the color filter patterns were deposited ejected successfully under the proper laser heating conditions.