Sapphire window laser edge annealing

Details Sapphire window laser edge annealing Sapphire window laser edge annealing

1996-03-05

1997-12-16

Ozaja, Donald E.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65111, 65DIG4, C03B 2100, C03B 2300, C03B 2500, C03B 3100

Patent

active

056979983

ABSTRACT:
A sapphire window is laser edge annealed using a CO.sub.2 laser spot illuminating along a path following the edge of the window so as to heat the edges to remove or reduce sub surface defects which can cause stress fractures.

REFERENCES:
patent: 4338114 (1982-07-01), Brockway et al.
patent: 4375993 (1983-03-01), Mori et al.
patent: 5533040 (1996-07-01), Zhang
"Infrared Window and Dome Materials",D.C. Harris, SPIE Optical Engineering Press, vol. TT 10, pp. 38-41, Jul. 1972.
"CRC Handbook of Chemistry and Physics",R.C. Weast, CRC Press, Inc., 67th ed., pp. B-68, B-103, B-126, B-127, B-143, B-145, 1986-1987.
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"Laser Induced Damage in Transparent Dielectrics: Ion Beam Polishing as a Means of Increasing Surface Damage Thresholds", by C.R. Giuliano Appl. Phys. Lett. vol. 21, No. 1, Jul. 1, 1972.
"Measurements of the Melt Dynamics in Laser Annealed Semiconductors", by P.S. Peercy, et al. Physica vol. 116b,.
"Timed Resolved Measurements of Interface Dynamics During Pulsed laser Melting Observed by Transient Conductance", by M.O. Thompson, et al. Mat.Res.Soc.Symp.Proc., vol. 13, pp. 57-67, 1983.
"CW Laser Annealing of Ion Implanted Oxidized Silicon Layers on Sapphire", by G. Alestig, et al. Mat.Res.Soc.Symp.Proc., vol. 13, 1983.
"Laser Sealed Vacuum Insulating Window", by D.K. Benson, et al. U.S. Patent Application, S/N 767,218 published, AIAA Technical Library, Aug. 1985.

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