Lithographic apparatus, radiation beam inspection device, method of inspecting a beam of radiation and device manufacturing method
First Claim
Patent Images
1. A lithographic projection apparatus, comprising:
- a patterning device that modulates a beam of radiation;
a projection system that is configured to produce an array of sub-beams of the modulated beam of radiation and to project the array of sub-beams of the modulated beam onto a target portion of a substrate; and
a radiation beam inspection device that comprises,a barrier to the radiation beam having an aperture that permits a portion of the radiation beam to pass through the barrier, wherein a size of a largest dimension of the aperture is smaller than a separation between adjacent ones of the sub-beams of radiation in a plane at which the array of sub-beams are incident on the barrier, anda radiation sensor that detects intensity of the radiation passing through the aperture and a position, relative to the aperture, at which the radiation passing through the aperture is incident on the radiation sensor.
1 Assignment
0 Petitions
Accused Products
Abstract
A lithographic apparatus having a radiation beam inspection device including a barrier to the beam of radiation, the barrier having an aperture through which a portion of the beam of radiation passes; and a radiation sensor that determines the intensity of the radiation passing through the aperture and the position, relative to the aperture, of the point at which the radiation is incident on the radiation sensor.
24 Citations
20 Claims
-
1. A lithographic projection apparatus, comprising:
-
a patterning device that modulates a beam of radiation; a projection system that is configured to produce an array of sub-beams of the modulated beam of radiation and to project the array of sub-beams of the modulated beam onto a target portion of a substrate; and a radiation beam inspection device that comprises, a barrier to the radiation beam having an aperture that permits a portion of the radiation beam to pass through the barrier, wherein a size of a largest dimension of the aperture is smaller than a separation between adjacent ones of the sub-beams of radiation in a plane at which the array of sub-beams are incident on the barrier, and a radiation sensor that detects intensity of the radiation passing through the aperture and a position, relative to the aperture, at which the radiation passing through the aperture is incident on the radiation sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A radiation beam inspection device, comprising
a radiation barrier having a plurality of apertures, each aperture permits a portion of a beam of radiation that is incident on the radiation beam inspection device to pass through the barrier, wherein the radiation beam is pulsed; -
an actuator that moves the radiation barrier at a constant velocity relative to a projection system, wherein a spacing of the apertures, the velocity of the barrier relative to a projection system, and a pulse rate of the beam are arranged such that successive apertures allow different portions of a given region of the beam to pass through the barrier to the radiation sensor during successive pulses; and a radiation sensor that detects an intensity of the radiation passing through the aperture and a position, relative to the aperture, at which the radiation passing through the aperture is incident on the radiation sensor. - View Dependent Claims (17)
-
-
18. A method of inspecting a beam of radiation, comprising:
-
pulsing the beam of radiation; inspecting at least a portion of the beam of radiation using a radiation beam inspection device that comprises a barrier to the radiation, the barrier having a plurality of apertures, each aperture permits a portion of the radiation beam to pass through the barrier, and a radiation sensor; actuating the barrier at a velocity relative to a projection system, wherein the velocity of the barrier and the pulsing rate of the beam are selected such that successive apertures allow different portions of a given region of the beam of radiation to pass therethrough; detecting an intensity of the beam of radiation passing through one of the apertures using a radiation sensor; and determining position data, relative to the aperture, at which the beam of radiation passing through the aperture is incident on the radiation sensor. - View Dependent Claims (19, 20)
-
Specification