Patent ID: 6435196
Filing Date: 2002-08-20
Classification: H01L

Abstract:
An impurity processing apparatus, comprising:(a) an impurity-containing gas source for supplying an impurity-containing gas including at least one element or compound thereof selected from the group consisting of phosphorus, boron, antimony, arsenic, gallium, aluminum, and germanium; (b) a water-containing gas source for supplying a water-containing gas; and (c) a chamber comprising: (1) an introduction port for introduction of an impurity-containing gas which is connected to the impurity-containing gas source; (2) a substrate holder supporting a substrate which is to be ion-injected or doped using the impurity-containing gas, or on which a film is to be formed; (3) an introduction port, for introduction of a water-containing gas, located upstream of the substrate holder in accordance with flow direction of the impurity-containing gas, and connected only to the water-containing gas source, said water-containing gas source being the sole supply of cleaning agent connected to said chamber, and (4) first plasma generating means for generating a plasma of the water-containing gas in a space extending from the introduction port for the water-containing gas to the substrate holder, said plasma of water-containing gas serving as a cleaning agent for removing impurity-containing residue in said chamber.