Source: http://www.google.com/patents/US5968383?dq=6,998,619
Timestamp: 2016-02-07 11:14:45
Document Index: 569977983

Matched Legal Cases: ['art 1', 'Application No. 2', 'Application No. 2', 'Application No. 3', 'Application No. 3', 'Application No. 64', 'Application No. 64', 'art 1']

Patent US5968383 - Laser processing apparatus having beam expander - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsAn excimer laser annealing apparatus with an optical system. The optical system includes a cylindrical concave lens (A), a cylindrical convex lens (B), a fly-eye lens (C) made of a cylindrical lens array provided in a lateral direction and a fly eye lens (D) made of a cylindrical lens array provided...http://www.google.com/patents/US5968383?utm_source=gb-gplus-sharePatent US5968383 - Laser processing apparatus having beam expanderAdvanced Patent SearchPublication numberUS5968383 APublication typeGrantApplication numberUS 08/956,439Publication dateOct 19, 1999Filing dateOct 23, 1997Priority dateJun 26, 1992Fee statusPaidAlso published asCN1076864C, CN1087750A, CN1108225C, CN1128193A, CN1139105C, CN1214450C, CN1216404C, CN1284742A, CN1350322A, CN1414604A, CN1414615A, CN1921069A, CN1921069B, US5858473, US5897799, US6002101, US6440785, US6991975, US7985635, US20060194377Publication number08956439, 956439, US 5968383 A, US 5968383A, US-A-5968383, US5968383 A, US5968383AInventorsShunpei Yamazaki, Hongyong Zhang, Hiroaki IshiharaOriginal AssigneeSemiconductor Energy Laboratory Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (59), Non-Patent Citations (38), Referenced by (79), Classifications (44), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetLaser processing apparatus having beam expander
US 5968383 AAbstract
1. A laser processing apparatus for irradiating a semiconductor layer with a laser beam said apparatus comprising:a laser device for emitting a laser beam having a cross section; expanding means for expanding the laser beam only in a lengthwise direction of the cross section wherein an intensity distribution of the laser beam in the lengthwise direction is simultaneously homogenized by said expanding means, said expanding means comprising at least a cylindrical lens array and a convex lens which condenses the laser beam only in the lengthwise direction; supporting means for supporting a substrate to be treated with the expanded laser beam; moving means for moving said substrate in a widthwise direction of the cross section of the expanded laser beam. 2. An apparatus according to claim 1 wherein said substrate is a glass substrate having a semiconductor layer.
10. A laser processing apparatus for irradiating a semiconductor layer with a laser beam, said apparatus comprising:a laser device for emitting a laser beam having a cross section; expanding means for expanding the laser beam only in a lengthwise direction of the cross section wherein an intensity distribution of the laser beam in the lengthwise direction is homogenized by said expanding means, said expanding means comprising at least a cylindrical lens array and a convex lens which condenses the laser beam only in the lengthwise direction; condensing means for condensing the expanded laser beam only in a widthwise direction of the cross section; supporting means for supporting the substrate; moving means for moving said substrate in a widthwise direction of the cross section of the expanded laser beam. 11. An apparatus according to claim 10 wherein said substrate is a glass substrate having a semiconductor layer.
19. A laser processing apparatus comprising:a laser device for emitting a laser beam having a cross section; expanding means for expanding the laser beam only in a lengthwise direction of the cross section wherein an intensity distribution of the laser beam in the lengthwise direction is simultaneously homogenized by said expanding means; an optical means for making a length of the cross section of the expanded laser beam constant during the propagation thereof, said length being at least 10 cm; supporting means for supporting a substrate to be treated with the expanded laser beam; moving means for moving said substrate in a widthwise direction of the cross section of the expanded laser beam so that an entire surface of said substrate can be treated with the expanded laser beam. 20. An apparatus according to claim 19 wherein said substrate is a glass substrate having a semiconductor layer.
24. A laser processing apparatus for irradiating a semiconductor layer with a laser beam said apparatus comprising:a laser device for emitting a laser beam having a cross section; expanding means for expanding the laser beam only in a lengthwise direction of the cross section wherein an intensity distribution of the laser beam in the lengthwise direction is homogenized by said expanding means, said expanding means comprising at least a first cylindrical lens array and a first convex lens which condenses the laser beam only in the lengthwise direction: condensing means for condensing the expanded laser beam only in a widthwise direction of the cross section, said condensing means comprising a second cylindrical lens array and a second convex lens which condenses the laser beam only in the widthwise direction; supporting means for supporting the substrate; moving means for moving said substrate in a widthwise direction of the cross section of the expanded laser beam so that an entire surface of said substrate can be treated with the expanded laser beam. 25. An apparatus according to claim 24 wherein said semiconductor layer comprises a material selected from the group consisting of silicon, germanium, silicon carbide, and an alloy of silicon and germanium.
33. A laser processing apparatus for irradiating a semiconductor layer with a laser beam, said apparatus comprising:a laser device for emitting a laser beam having a cross section; expanding means for expanding the laser beam only in a lengthwise direction of the cross section wherein an intensity distribution of the laser beam in the lengthwise direction is homogenized by said expanding means, said expanding means comprising at least a first cylindrical lens array which comprises a plurality of cylindrical lenses arranged in the lengthwise direction and a first convex lens which condenses the laser beam only in the lengthwise direction; condensing means for condensing the expanded laser beam only in a widthwise direction of the cross section, said condensing means comprising a second cylindrical lens array which comprises a plurality of cylindrical lenses arranged in the widthwise direction and a second convex lens which condenses the laser beam only in the widthwise direction; supporting means for supporting the substrate; and moving means for moving said substrate in a widthwise direction of the cross section of the expanded laser beam so that an entire surface of said substrate can be treated with the expanded laser beam. 34. An apparatus according to claim 33 wherein said semiconductor layer comprises a material selected from the group consisting of silicon, germanium, silicon carbide, and an alloy of silicon and germanium.
M=(X3 +X4)/X5 1/F=1/(X3 +X4)+1/X5 In this EXAMPLE, a total length X6 of the optical path is about 1.3 m.
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