Top IPC subclasses
1
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H01L
|
25
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Semiconductor devices; electric solid state devices not otherwise provided for
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2
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C22B
|
6
|
production or refining of metalspretreatment of raw materials
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3
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C30B
|
4
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single-crystal growthunidirectional solidification of eutectic material or unidirectional demixing o
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4
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B09B
|
2
|
disposal of solid waste
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5
|
C23C
|
1
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Coating metallic material; coating material with metallic material; surface treatment of metallic material by diffusion into the surface, by chemical conversion or substitution; coating by vacuum evaporation, by sputtering, by ion implantation or by chemical vapour deposition, in general
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