Crucible for evaporation of raw materials
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Accused Products
Abstract
Crucibles having a bottom and surrounding side walls, provided with electrode clamps at exterior sites of side walls located opposite with respect to each other, wherein said sites are extending as lips at said side walls, and wherein said clamps are connectable with electrodes for heating said crucible, are improved in that a cross-section of each of said lips between between crucible wall and clamp is reduced with at least 5%.
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Citations
68 Claims
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1-44. -44. (canceled)
- 45. Evaporation method by electric resistance heating of a crucible having a bottom and surrounding side walls provided with electrode clamps at exterior sites of side walls located opposite with respect to each other, wherein said sites are extending as lips at said side walls, and wherein said clamps are connectable with electrodes for heating said crucible, characterized in that a cross-section of each of said lips between between crucible wall and electrode clamp is reduced with at least 5%, by providing each lip with perforations wherein said crucible is filled with raw materials up to at most 80% of its total volume, determined by its inner surface of its bottom and height of its inner side walls and wherein electric heating proceeds up to a temperature exceeding the melting temperature of said raw materials with at least 10°
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53. Evaporation method by electric resistance heating of a crucible having a bottom and surrounding side walls provided with electrode clamps at exterior sites of side walls located opposite with respect to each other, wherein said sites are extending as lips at said side walls, and wherein said clamps are connectable with electrodes for heating said crucible, characterized in that a cross-section of each of said lips between between crucible wall and electrode clamp is reduced with at least 5%, by providing each lip with perforations wherein said crucible is filled with raw materials up to at most 50% of its total volume, determined by its inner surface of its bottom and height of its inner side walls and wherein electric heating proceeds up to a temperature exceeding the melting temperature of said raw materials in the range from 20°
- C. up to 100°
C. above the melting temperature of said materials. - View Dependent Claims (54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68)
- C. up to 100°
Specification