Source: http://www.google.com/patents/US5897799?dq=6289460
Timestamp: 2017-09-25 14:33:00
Document Index: 450171480

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

Patent US5897799 - Laser processing apparatus - Google Patents
A laser processing apparatus including a laser device for emitting a first laser beam having a first cross section having a length and a width and an optical system for modifying the first laser beam to produce a second laser beam having a virtual focus. The second laser beam has a second cross section...http://www.google.com/patents/US5897799?utm_source=gb-gplus-sharePatent US5897799 - Laser processing apparatus
Publication number US5897799 A
Application number US 08/661,869
Also published as CN1076864C, CN1087750A, CN1108225C, CN1128193A, CN1139105C, CN1214450C, CN1216404C, CN1284742A, CN1350322A, CN1414604A, CN1414615A, CN1921069A, CN1921069B, US5858473, US5968383, US6002101, US6440785, US6991975, US7985635, US20060194377
Publication number 08661869, 661869, US 5897799 A, US 5897799A, US-A-5897799, US5897799 A, US5897799A
Patent Citations (20), Non-Patent Citations (10), Referenced by (138), Classifications (45), Legal Events (3)
US 5897799 A
1. A laser processing apparatus for processing a semiconductor film comprising:
a laser device for emitting a laser beam having a first cross section;
a lateral flyeye lens for homogenizing an energy distribution of said laser beam in a widthwise direction of the cross section;
a first cylindrical convex lens for condensing the laser beam after passing through the lateral flyeye lens in only the widthwise direction;
a mirror for directing said laser beam after passing through said first cylindrical convex lens to said semiconductor film, and
a second cylindrical convex lens for condensing said laser beam in said widthwise direction, said second cylindrical convex lens being located on an optical path between said mirror and said semiconductor film,
wherein a distance X3 between a focus of said first cylindrical convex lens and the mirror, a distance X4 between the mirror and said second cylindrical convex lens, a distance X5 between said second cylindrical convex lens and said semiconductor film satisfy the following conditions:
M=(X3 +X4)/X5, where M is a magnification, and
1/F=1/(X3 +X4)+1/X5, F is a focal distance of the second cylindrical convex lens; and
means for relatively moving said semiconductor film with respect to said condensed laser beam.
2. A laser processing apparatus for processing a semiconductor film comprising:
a lateral flyeye lens for homogenizing an energy distribution of said laser beam in a widthwise direction;
a cylindrical convex lens for condensing the laser beam after passing through the lateral flyeye lens in only the widthwise direction;
a mirror for directing said laser beam after passing through said cylindrical convex lens to said semiconductor film; and
a condensing means for condensing said laser beam only in the widthwise direction in order to form a condensed laser beam at said semiconductor film, said condensing means being located on an optical path between said mirror and said semiconductor film; and
moving means for relatively moving said semiconductor film relative to said laser beam in said widthwise direction,
wherein a distance X3 between a focus of said cylindrical convex lens and the mirror, a distance X4 between the mirror and said condensing means, a distance X5 between said condensing means and said semiconductor film satisfy the following conditions:
1/F=1/(X3 +X4)+1/X5, F is a focal distance of the condensing means.
3. A laser processing apparatus for processing a semiconductor film comprising:
a mirror for directing said laser beam after passing through said cylindrical convex lens to said semiconductor film;
a condensing means for condensing said laser beam only in the widthwise direction, said condensing means being located on an optical path between said mirror and said semiconductor film; and
M=(X3 +X4)/X5 where M is a magnification.
9. A laser processing apparatus for processing a semiconductor film comprising:
a first cylindrical convex lens for condensing the laser beam after passing through the lateral flyeye lens in only the widthwise direction,
a second cylindrical convex lens for condensing said laser beam having passed through said first cylindrical convex lens in said widthwise direction,
M=(an optical path length between the focus of said first cylindrical convex lens and the second cylindrical convex lens)/(an optical path length between the second cylindrical convex lens and said semiconductor film), and;
means for relatively moving said semiconductor film with respect to the condensed laser beam.
10. A laser processing apparatus for processing a semiconductor film comprising:
wherein a focal length F of the second cylindrical convex lens satisfies the following relation:
1/F=1/(an optical path length between the focus of the first cylindrical convex lens and the second cylindrical convex lens)+1/(an optical path length between the second cylindrical convex lens and said semiconductor film), and
11. A laser processing apparatus for processing a semiconductor film comprising:
a second cylindrical convex lens for condensing said laser beam after passing through said first cylindrical convex lens only in said widthwise direction,
wherein said second cylindrical convex lens is distant from said first cylindrical convex lens by a distance larger than a focal length of said first cylindrical convex lens, and
means for relatively moving said semiconductor film with respect to the laser beam condensed by the second cylindrical convex lens.
12. A laser processing apparatus for processing a semiconductor film comprising:
a vertical flyeye lens for homogenizing an energy distribution of said laser beam in a lengthwise direction of the cross section;
a second cylindrical convex lens for condensing said laser beam after passing through said vertical flyeye lens only in said lengthwise direction,
a third cylindrical convex lens for condensing said laser beam after passing through said first and second cylindrical convex lenses only in said widthwise direction; and
wherein said third cylindrical convex lens is distant from said first cylindrical convex lens by a distance larger than a focal length of said first cylindrical convex lens, and
means for relatively moving said semiconductor film with respect to said condensed laser beam condensed by said third cylindrical convex lens.
1 "High-Performance TFT's Fabricated by XeCl Excimer Laser Annealing of Hydrogenated Amorphous-Silicon Film", K. Sera et al., IEEE Transactions on Electron Devices, vol. 36, No. 12, Dec. 1989.
2 "P-28: 3.7-in.-Diagonal STN-LCD with Stripe Electrode Patterns Fabricated by an Excimer-Laser Scribing System" T. Konuma et al., 550 SID 93 Digest.
3 * English Translation of Japanese Application No. 2 73623, Publication Date of Mar. 13, 1990.
4 English Translation of Japanese Application No. 2-73623, Publication Date of Mar. 13, 1990.
5 * English Translation of Japanese Application No. 3 286518, Publication Date of Dec. 17, 1991.
6 English Translation of Japanese Application No. 3-286518, Publication Date of Dec. 17, 1991.
7 * English Translation of Japanese Application No. 64 76715, Publication Date of Mar. 22, 1989.
8 English Translation of Japanese Application No. 64-76715, Publication Date of Mar. 22, 1989.
9 * High Performance TFT s Fabricated by XeCl Excimer Laser Annealing of Hydrogenated Amorphous Silicon Film , K. Sera et al., IEEE Transactions on Electron Devices, vol. 36, No. 12, Dec. 1989.
10 * P 28: 3.7 in. Diagonal STN LCD with Stripe Electrode Patterns Fabricated by an Excimer Laser Scribing System T. Konuma et al., 550 SID 93 Digest.
EP1055479A2 * Jan 13, 2000 Nov 29, 2000 Sel Semiconductor Energy Laboratory Co., Ltd. Laser irradiation apparatus
EP1055479A3 * Jan 13, 2000 Jul 17, 2002 Sel Semiconductor Energy Laboratory Co., Ltd. Laser irradiation apparatus
U.S. Classification 219/121.75, 257/E21.134, 359/622
International Classification C23C14/58, C23C16/56, H01L21/268, H01S3/00, G02B27/09, H01L21/322, H01S3/09, H01L21/00, B23K101/40, B23K26/06, H01S5/024, H01S3/097, B23K26/067, G02F1/35, G02B13/00, H01L21/02, H01L21/20, G02F1/00, H01L21/26, H01L21/324, H01L21/265, B23K26/00
Cooperative Classification H01L21/26513, C23C16/56, H01L21/2022, C23C14/58, G02B27/0966, C23C14/5813, G02B27/09, H01L21/2026, H01L27/1285, H01L21/268, H01L21/84
European Classification H01L27/12T, C23C14/58, C23C14/58B2, C23C16/56, H01L21/20D2, H01L21/265A2, G02B27/09, H01L21/268, G02B27/09S2L2