Patent ID: 7605089

Claim:
A method of manufacturing an electronic device comprising a plurality of electrical elements and an interconnect structure interconnecting said electrical elements according to a desired pattern, said structure containing vertical interconnects through at least one layer of dielectric material, in which method the provision of the vertical interconnects comprises the steps of: providing at least one layer of dielectric material onto an electrically conductive surface; providing a photoresist layer on the at least one layer of dielectric material and suitable for irradiation at a wavelength of at most 200 nm; irradiating the photoresist layer at a wavelength of at most 200 nm and developing the photoresist layer to produce a patterned photoresist mask; and patterning the layer of dielectric material using the patterned photoresist mask, characterized in that before patterning the layer of dielectric material a plasma ignition treatment is performed on the patterned photoresist mask with a plasma gas dissociating in ions with an atomic mass that is at most equal to that of CF.