Patent ID: 7846648

Claim:
A method of developing a substrate having a predetermined base film formed under a resist film, comprising the steps of: supplying a developing solution to the substrate to develop the resist film formed on the substrate; and thereafter supplying a predetermined treatment solution to the substrate to dissolve the base film at a portion exposed by the development of the resist film, wherein the base film has solubility in the developing solution, wherein the predetermined treatment solution is a developing solution lower in concentration than the developing solution used for developing the resist film, wherein a same nozzle for supplying the predetermined treatment solution is used when the developing solution is supplied for developing the resist film, wherein the nozzle comprises a developing solution storage chamber to store the developing solution, a liquid storage chamber to store a predetermined liquid that is to be mixed in the developing solution, and a mixing chamber to communicate with said developing solution storage chamber and said liquid storage chamber and in which the developing solution flowing from said developing solution storage chamber and the liquid flowing from said liquid storage chamber are mixed, and wherein the predetermined treatment solution is produced in said mixing chamber.