Patent ID: 6084436
Filing Date: 2000-07-04
Classification: H01L

Abstract:
A two-input semiconductor logic device comprising:an active area formed in a semiconductor substrate; first, second, third, fourth, and fifth source/drain regions formed in said active area;first, second, third, and fourth gate electrodes formed over said active area through a gate insulating layer;said first, second, third, fourth, and fifth source/drain regions being arranged along an axis of said active area;said first source/drain region being located at a middle position of said active area;said second and fourth source/drain regions being located to be adjacent to said first source/drain region at each side of said first source/drain region;said third and fifth source/drain regions being located to be adjacent to said second and fourth source/drain regions, respectively;said first gate electrode being located between said first and second source/drain regions;said second gate electrode being located between said first and fourth source/drain regions;said third gate electrode being located between said second and third source/drain regions;said fourth gate electrode being located between said fourth and fifth source/drain regions;said first and second source/drain regions and said first gate electrode constituting a first IGFET, said first and fourth source/drain regions and said second gate electrode constituting a second IGFET, said second and third source/drain regions and said third gate electrode constituting a third IGFET, said fourth and fifth source/drain regions and said fourth gate electrode constituting a fourth IGFET;said first and fourth gate electrodes being electrically connected to one another to be applied with a first digital input signal;said second and third gate electrodes being electrically connected to one another to be applied with a second digital input signal;said third and fifth source/drain regions being electrically connected to one another; anda digital output signal being derived from said first source/drain region or said electrically-connected third and fifth source/drain regions.