Single crystals and methods for fabricating same
DC CAFCFirst Claim
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1. A sapphire single crystal, comprising:
- a single crystal sheet having a length, width and thickness, wherein length >
width>
thickness, the width is not less than about 15 28 cm, and the thickness is not less than about 0.5 cm.
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Abstract
Various single crystals are disclosed including sapphire. The single crystals have desirable geometric properties, including a width not less than about 15 cm and the thickness is not less than about 0.5 cm. The single crystal may also have other features, such as a maximum thickness variation, and as-formed crystals may have a generally symmetrical neck portion, particularly related to the transition from the neck to the main body of the crystal. Methods and for forming such crystals and an apparatus for carrying out the methods are disclosed as well.
42 Citations
44 Claims
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1. A sapphire single crystal, comprising:
a single crystal sheet having a length, width and thickness, wherein length >
width>
thickness, the width is not less than about 15 28 cm, and the thickness is not less than about 0.5 cm.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 25, 26, 27, 28, 29, 30, 31, 32)
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10. A sapphire single crystal, comprising:
a single crystal sheet having a length, width and thickness, wherein length >
width>
thickness, the width is not less than about 15 cm, the thickness is not less than about 0.5 cm, and a variation in thickness of not greater than 0.2 cm.
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11. A sapphire single crystal, comprising:
an as-grown single crystal sheet having a length, width and thickness, wherein length>
width>
thickness, the width is not less than about 15 28 cm, the single crystal sheet further having a neck and a main body that defines first and second opposite lateral sides that are generally parallel to each other, a transition of the neck to the main body portion is defined by respective first and second transition points of the first and second opposite lateral sides, and the single crystal has a Δ
T not greater than 4.0 cm, wherein Δ
T is the distance by which the respective first and second transition points are spaced apart as projected along a length segment of the single crystal sheet.- View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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33. A sapphire single crystal, comprising:
an as-grown single crystal sheet having a length, width and thickness, wherein length >
width>
thickness, the width is not less than 28 cm, and the thickness is not less than about 0.5 cm.- View Dependent Claims (34, 35)
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36. A sapphire single crystal, comprising:
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a single crystal sheet having a length, width and thickness, wherein; length>
width>
thickness, the width is not less than 28 cm, and the thickness is not less than about 0.5 cm; andthe single crystal sheet is substantially transparent in the infrared and visible wavelength spectrums. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44)
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Specification