Abstract: Pre-amorphization of a surface layer of crystalline silicon to an ultra-shallow (e.g., less than 100 nm) depth provides a solution to fabrication problems including (1) high thermal conduction in crystalline silicon and (2) shadowing and diffraction-interference effects by an already fabricated gate of a field-effect transistor on incident laser radiation. Such problems, in the past, have prevented prior-art projection gas immersion laser doping from being effectively employed in the fabrication of integrated circuits comprising MOS field-effect transistors employing 100 nm and shallower junction technology.
Type:
Grant
Filed:
January 31, 1997
Date of Patent:
June 1, 1999
Assignee:
Ultratech Stepper, Inc.
Inventors:
Somit Talwar, Karl-Josef Kramer, Guarav Verma, Kurt Weiner
Abstract: A schottky diode is formed of a sintered palladium platinum silicide in contact with a lightly doped silicon surface in which the platinum and palladium are present in a ratio of about one part to about 10 parts respectively, by weight.