Patent ID: 6709959
Filing Date: 2004-03-23
Classification: H01L

Abstract:
A method of fabricating a semiconductor device, comprising the steps of:introducing an impurity element into a Si substrate by an ion implantation process with an energy set such that the depth of a junction formed in said Si substrate by said impurity element is less than about 50 nm; and annealing, after said step of ion implantation process, said substrate; wherein said method further includes a step of removing an oxide film, from at least a portion of a surface of said Si substrate where ions are implanted, immediately before said step of ion implantation process so that said ion implantation process is conducted in the absence of an oxide film in said portion of said substrate and a junction is formed in said substrate with a depth shallower than a depth of a junction formed in said substrate by conducting said ion implantation process through said oxide film under the same condition.