Patent ID: 6081010
Filing Date: 2000-06-27
Classification: H01L

Abstract:
A high-speed submicron channel metal oxide semiconductor transistor which exhibits excellent punchthrough characteristics and which is ideal for VLSI circuits, formed on a semiconductor substrate of a first conductivity type having a first concentration comprising:a gate insulating layer formed on said substrate;an inner gate electrode of a predetermined length and width formed on said gate insulating layer, said inner gate electrode including laterally opposite sidewalls along said width of said inner gate electrode;a first punchthrough stop region and a second punchthrough stop region of a second concentration of said first conductivity type wherein said second concentration of said first conductivity type is greater than said first concentration of said first conductivity type, said first punchthrough stop region and said second punchthrough stop region disposed in said substrate in alignment with said laterally opposite sidewalls of said inner gate electrode, respectively;a first conductive spacer and a second conductive spacer formed on said gate insulating layer over a portion of said first punchthrough stop region and said second punchthrough stop region, respectively, said first conductive spacer and said second conductive spacer adjacent to and in electrical contact with respective laterally opposite sidewalls of said inner gate electrode, said first conductive spacer and said second conductive spacer forming along with said inner gate electrode a MOSFET gate electrode; anda first source region and a first drain region of a first concentration of a second conductivity type disposed in said first punchthrough stop region and said second punchthrough stop region, respectively, self-aligned with the outer edge of said first conductive spacer and said second conductive spacer, respectively.