Patent ID: 6200907
Filing Date: 2001-03-13
Classification: H01L

Abstract:
A method of forming a metal line, comprising:providing a semiconductor substrate comprising a metal layer, an oxide layer over the metal layer, and a barrier metal layer over the oxide layer;depositing an ultra-thin photoresist over the barrier metal layer, the ultra-thin photoresist having a thickness less than about 2,000 .ANG.;irradiating the ultra-thin photoresist with electromagnetic radiation having a wavelength of about 250 nm or less;developing the ultra-thin photoresist exposing a portion of the barrier metal layer,etching the exposed portion of the barrier metal layer exposing a portion of the oxide layer;etching the exposed portion of the oxide layer exposing a portion of the metal layer; andetching the exposed portion of the metal layer thereby forming the metal line.