Interferometric analysis method for the manufacture of nano-scale devices
First Claim
Patent Images
1. A method to determine relative spatial parameters between two substrates in a process of alignment comprising:
- collecting multiple alignment data from phase information using a moiré
based pair of overlaying alignment marks, one of the pair disposed on each of the two substrates;
capturing moiré
first order microscope images by diffracted light from one of the alignment marks, while a normal distance between the pair of alignment marks changes from 100 microns to less than 10 nm,wherein all microscopes used for capturing the first order microscope images for the alignment process are positioned outside of a beam path from a UV source focused through a template positioned on one of the two substrates; and
,determining relative spatial parameters between the two substrates using the moiré
first order microscope images.
12 Assignments
0 Petitions
Accused Products
Abstract
The present invention features a method to determine relative spatial parameters between two coordinate systems, which may be a mold and a region of a substrate in which mold is employed to generate a pattern. The method includes sensing relative alignment between the two coordinate systems at multiple points and determines relative spatial parameters therebetween. The relative spatial parameters include a relative area and a relative shape.
-
Citations
12 Claims
-
1. A method to determine relative spatial parameters between two substrates in a process of alignment comprising:
-
collecting multiple alignment data from phase information using a moiré
based pair of overlaying alignment marks, one of the pair disposed on each of the two substrates;capturing moiré
first order microscope images by diffracted light from one of the alignment marks, while a normal distance between the pair of alignment marks changes from 100 microns to less than 10 nm,wherein all microscopes used for capturing the first order microscope images for the alignment process are positioned outside of a beam path from a UV source focused through a template positioned on one of the two substrates; and
,determining relative spatial parameters between the two substrates using the moiré
first order microscope images. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method to determine relative spatial parameters between two substrates in a process of alignment comprising:
-
collecting multiple alignment data from phase information using a moiré
based pair of overlaying substrate alignment marks, one of the pair disposed on each of the two substrates;capturing moiré
first order microscope images by diffracted light from an alignment mark on the substrate farther from a microscope capturing the moiré
first order microscope images;controlling each microscope, capturing the first order microscope images, in a closed loop position feedback using alignment marks on the substrate containing patterns to be transferred to the other substrate, wherein a normal distance between the pair of overlapping substrate alignment marks changes from 100 microns to less than 10 nm; and determining relative spatial parameters between two substrates using the first order microscope images. - View Dependent Claims (8, 9, 10, 11, 12)
-
Specification