Method for the production of a self-adjusted structure on a semiconductor wafer
AssigneeInfineon Technologies AG
InventorsMatthias Goldbach, Thomas Hecht, Jörn Lützen, Bernhard Sell
Life of this patent
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Abstract
A structure on a layer surface of the semiconductor wafer has at least one first area region (8, 9), which is reflective for electromagnetic radiation, and at least one second, essentially nonreflecting area region (10, 11, 12). A light-transmissive insulation layer (13) and a light-sensitive layer are produced on said layer surface. The electromagnetic radiation is directed onto the light-sensitive layer with an angle Θ of incidence and the structure of the layer surface is imaged with a lateral offset into the light-sensitive layer.
Claims8
A method for fabricating a self-aligned structure on a semiconductor wafer, comprising:
- forming a structure on a layer surface of the semiconductor wafer with at least one first area region, at which an electromagnetic radiation is reflected, and at least one second, essentially nonreflecting area region;
- producing a light-transmissive insulation layer at least on the two area regions of the layer surface;
- producing a light-sensitive layer on the light-transmissive insulation layer;
- radiating a parallel electromagnetic beam of rays onto a surface of the light-sensitive layer;
- developing the light-sensitive layer,
- wherein
- the parallel electromagnetic beam of rays is directed onto the light-sensitive layer with an angle Θ of incidence and the angle Θ of incidence is prescribed such that the structure of the layer surface is imaged with a lateral offset into the light-sensitive layer.
Dependencies are inferred from the claim text.