Patent ID: 9155179
Filing Date: 2015-10-06
Classification: G21K,H01S,H05G

Abstract:
1. A method comprising: providing a target; directing a first amplified light beam toward the target to cause an interaction between the target and the first amplified light beam, the interaction between the target and the first amplified light beam forming a first plasma and a remaining portion of the target; allowing the first plasma to expand to form a collection of pieces from the remaining portion, the collection of pieces extending along the direction of propagation of the first amplified light beam; and directing a second amplified light beam toward the collection of pieces, the second amplified light beam having an energy sufficient to convert at least some of the pieces of the collection of pieces into a plasma that emits EUV light, wherein the collection of pieces comprises non-ionized pieces of a target material that emits EUV light when in a plasma state.