Patent ID: 7652750

Claim:
Lithography exposure device for producing exposed structures extending in a surface area in a light sensitive layer, comprising: a mounting device for the light-sensitive layer, an exposure unit comprising several laser radiation sources, an optical focusing means associated with the laser radiation sources for focusing laser radiation exiting from the respective laser radiation sources, said optical focusing means generating from the laser radiation of each of the laser radiation sources an exposure spot effective in the light-sensitive layer with a predetermined extension transverse to a direction of exposure movement, a movement unit for generating a relative movement between the optical focusing means and the mounting device in the direction of exposure movement, and a control for controlling intensity and position of the exposure spots relative to the light-sensitive layer in such a manner that a plurality of conversion areas penetrating the light-sensitive layer are generatable by means of the exposure spots, a material of the light-sensitive layer being converted in said areas from an initial state into the exposed state, and said areas together resulting in an exposed structure, the optical focusing means having an end lens generating focal points of the laser radiation exiting from each of the laser radiation sources close to the light-sensitive layer, and a laser radiation field propagating in a direction of the light sensitive layer for generating each of the exposure spots from the respective focal points and having a power density leading in the conversion area in the light-sensitive layer to an elongated longitudinal channel extending in the direction of propagation of the radiation field through the light sensitive layer, said channel being formed by a Kerr effect induced change in an index of refraction, which channel penetrates the light-sensitive layer with the index of refraction increased in relation to the channel's surroundings and guides the respective laser radiation field in a spatially limited manner, the channel having, transversely to the direction of propagation, a cross sectional surface area corresponding at most to an extension of the corresponding exposure spot on a surface of the light sensitive layer facing the lens.