Adaptive lithography system to provide high density interconnect
First Claim
1. An adaptive method of providing high density interconnections among a plurality of integrated circuits on a substrate, said method comprising the steps of:
- generating an artwork representation for the interconnections among said integrated circuits at predetermined ideal positions and orientations on said substrate;
determining the actual position and orientation of each of said integrated circuits on said substrate;
modifying said artwork representation for said interconnections among said integrated circuits to properly interconnect at least two of said integrated circuits in their actual positions and orientations, wherein said at least two integrated circuits are not in their ideal positions and orientations; and
forming high density interconnections among said integrated circuits using said modified artwork representation.
4 Assignments
0 Petitions
Accused Products
Abstract
An adaptive method and system are disclosed for providing high density interconnections of very large scale integrated circuits on a substrate. The procedure is performed in four basic steps: first an artwork representation for the interconnections of the integrated circuits is generated. This artwork representation is stored in a computer data base and assumes the integrated circuits to be at predetermined ideal locations and positions on the substrate. Second, using imaging, the actual positions of each integrated circuit on the substrate are determined. The actual positions of the integrated circuits are compared with their ideal positions to compute an offset and rotation for each integrated circuit on the substrate. Third, the computed offsets and rotations are then used to modify the artwork representation stored in the data base to account for the actual locations and positions of the integrated circuits on the substrate. Finally, the modified artwork representation is used to drive a direct writing laser lithography system that actually forms the high density interconnections of the integrated circuits on the substrate. The artwork representations are stored in computer data bases in vector form to minimize storage requirements. The laser beam produced by the lithography system is raster scanned on the substrate. Modulation of the laser beam is controlled by the real time conversion of the vector representation of the modified artwork to be a bit mapped representation. To assure accurate formations of the interconnects, a feedback alignment system is used to accurately position the laser beam throughout its raster scan.
187 Citations
14 Claims
-
1. An adaptive method of providing high density interconnections among a plurality of integrated circuits on a substrate, said method comprising the steps of:
-
generating an artwork representation for the interconnections among said integrated circuits at predetermined ideal positions and orientations on said substrate; determining the actual position and orientation of each of said integrated circuits on said substrate; modifying said artwork representation for said interconnections among said integrated circuits to properly interconnect at least two of said integrated circuits in their actual positions and orientations, wherein said at least two integrated circuits are not in their ideal positions and orientations; and forming high density interconnections among said integrated circuits using said modified artwork representation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. An adaptive lithography system for providing high density interconnections of integrated circuits on a substrate, said system comprising:
-
memory means for storing in a first data base an artwork representation for the interconnections among said integrated circuits at predetermined ideal positions and orientations on said substrate; imaging means for determining the actual position and orientation of each of said integrated circuits on said substrate; computing means responsive to said memory means and said imaging means for modifying said artwork representation to match the actual position and orientation of each of said integrated circuits and for storing a modified artwork representation as a second data base in said memory means; and laser lithography means controlled by said modified artwork representation in said second data base for forming high density interconnections among said integrated circuits. - View Dependent Claims (10, 11, 12, 13, 14)
-
Specification