Spin-on dopant technique has been investigated in the paper. The boron and phosphorus were used as p-and n-type dopant sources and were deposited on silicon substrates, followed by the baking process to evaporate the solvents from spin-on dopant layers. The standard drive-in process was applied to diffuse and activate the dopants. The curing temperature varied from 150 to 200 o C to investigate the temperature effect on dopant activation. It is suggested that for our selected spin-on dopant sources, the curing temperature and time of 175 o C and 60 minutes would lead to the best result of dopant activation during drive-in process, evidenced by the lowest sheet resistance, which was measured using four-point probe measurement method.