Patent ID: 7880152

Claim:
A method for producing resist profiled elements with an electron beam lithography system, which produces the electron beam with a primary energy, the beam axis of which is largely perpendicular to a resist layer in which the resist profile is produced, comprising the steps of: providing the resist layer in the form of a negative resist on a substrate; exposing surfaces of a selected resist system of substrate, resist and thickness of the resist layer with different doses and determining a contrast curve after development the measured residual thickness of the resist layer; determining for a later defined adjustment of the electron beam lithography system a scattering cone and a size thereof in relation to the resist system, wherein a plurality of single lines are scribed in the resist layer with a probe size as small as possible and thereby obtaining a residual resist thickness distribution which is dependent on the site of incidence of the electron beam and being converted with the help of the contrast curve into an electron dose distribution that is the scattering cone; determining from the contrast curve the electron dose distribution of the scattering cone the resulting resist thickness distribution, which depends from several parameters; adjusting the electron beam with regard to parameters including the electron surface dose, width of the generated resist profile, thickness of the resist layer, and/or the primary energy of the electron beam, such that a non-orthogonal resist profile is produced and the probe size is the smallest possible structure size; and adjusting the probe size is quasi-continuously, whereby the primary energy of the electron beam is continuously changeable, a lower energy limit of the primary electrons is 1 keV, and an upper energy limit of the primary electrons is 20 keV.