Patent ID: 6271565
Filing Date: 2001-08-07
Classification: H01L

Abstract:
An asymmetrical field effect transistor produced according to a method comprising the steps of:providing a semiconductor surface having a structure created on the semiconductor surface, the structure having a first side and a second side;forming a barrier of height h extending upward from the semiconductor surface at a location between the second side of the structure and a maximum distance d from the first side of the structure, the step of forming a barrier being performed after the structure is created on the semiconductor surface;performing a first side ion implant at an angle of between zero and ninety degrees relative to the semiconductor surface and directed at the first side of the structure, the maximum distance d being equal to the height of the barrier h divided by the tangent of the angle of the first side ion implant; andperforming a second side ion implant at an angle of between zero and ninety degrees relative to the semiconductor surface and directed at the second side of the structure.