Electro-less discharge extreme ultraviolet light source
First Claim
1. An electrode-less discharge extreme ultraviolet light source, comprising:
- a vacuum vessel;
an input nozzle disposed within the vessel along an axis, the input nozzle being configured to input material along the axis from which radiation is desired;
an evacuation port disposed along the axis and spaced apart from the input nozzle;
a first theta-pinch coil disposed radially about the axis proximate to the input nozzle;
a second theta-pinch coil disposed radially about the axis proximate to said evacuation port;
a first mirror-field coil disposed radially about the axis proximate to the input nozzle;
a second mirror-field coil disposed radially about the axis proximate to the evacuation port;
the first theta-pinch coil being disposed between the first mirror-field coil and the axis, and the second theta-pinch coil being disposed between the second mirror-field coil and the axis;
the first and second theta pinch coils and the first and second mirror-field coils being driven so as to form and heat a plasma about a position midway between the input nozzle and the evacuation port, thereby emitting radiation at the midway position.
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Accused Products
Abstract
An electrode-less discharge source of extreme ultraviolet (EUV) radiation (10) efficiently assembles a hot, dense, uniform, axially stable plasma column (5) with magnetic pressure and inductive current drive. It employs theta-pinch-type magnetic compression of plasma confined in a magnetic mirror. Plasma, confined in a magnetic mirror, is made to radiate by resonant magnetic compression. The device comprises a radiation-source gas input nozzle (1), an optional buffer-gas input flow (2), mirror-field coils (9a, 9b), theta-pinch coils (8a, 8b), a plasma and debris dump (11), and an evacuation port (7). The circular currents yield an axially stable plasma-magnetic-field geometry, and a reproducible, stable, highly symmetrical EUV source.
75 Citations
44 Claims
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1. An electrode-less discharge extreme ultraviolet light source, comprising:
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a vacuum vessel; an input nozzle disposed within the vessel along an axis, the input nozzle being configured to input material along the axis from which radiation is desired; an evacuation port disposed along the axis and spaced apart from the input nozzle; a first theta-pinch coil disposed radially about the axis proximate to the input nozzle; a second theta-pinch coil disposed radially about the axis proximate to said evacuation port; a first mirror-field coil disposed radially about the axis proximate to the input nozzle; a second mirror-field coil disposed radially about the axis proximate to the evacuation port; the first theta-pinch coil being disposed between the first mirror-field coil and the axis, and the second theta-pinch coil being disposed between the second mirror-field coil and the axis; the first and second theta pinch coils and the first and second mirror-field coils being driven so as to form and heat a plasma about a position midway between the input nozzle and the evacuation port, thereby emitting radiation at the midway position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification