the present invention relates to the transmissive programmable mask for forming biomolecules such as dna or polymer array by irradiating specific cells with incident lights , and to the method for forming the biomolecules or polymer array using the same . each unit pixel of the programmable mask comprises , a solution which includes charged particles which are moved by electrophoresis and interrupt the progress of the incident light , and electrodes for applying voltages to the particles in order to adjust the transmissivity of the incident light by changing the arrangement of the particles .