Patent ID: 6420094
Filing Date: 2002-07-16
Classification: G03F

Abstract:
A manufacturing method of semiconductor devices comprising the steps of:irradiating a phase shift exposure mask having a phase shifter with an exposure light having an optical intensity distribution extending in a primary direction in its section; and projecting the light transmitted through said phase shift exposure mask on a surface to be exposed; wherein an exposure is carried out on said surface with non-symmetrical exposure characteristics including one direction which is substantially parallel to said primary direction, in which an unexposed portion having a sharp decrease of optical intensity is generated close to and along with an edge portion of the phase shifter of said phase shift exposure mask, and also including a second direction, different from said first direction, in which the unexposed portion is not formed; and wherein an aperture such as a contact hole is formed through a negative process and an isolated line portion to be used as a gate electrode or a wiring layer is formed through a positive process.