DIFF Subgroup
C30B 15/20 Controlling or regulating (controlling or regulating in general G05)
Introduced: January 1980
Title
Titles differ between systems:
IPC: Controlling or regulating
CPC: Controlling or regulating (controlling or regulating in general G05)
Full Title
Full titles differ between systems:
IPC:
Single-crystal growth by pulling from a melt, e.g. Czochralski method > Controlling or regulating
CPC:
Single-crystal growth by pulling from a melt, e.g. Czochralski method (under a protective fluid C30B27/00) > Controlling or regulating (controlling or regulating in general G05)
CPC subdivides this area 3x more granularly than IPC with 2 additional codes.
2 codes are CPC-only extensions.
IPC defines codes here since 1980.
Child Classifications
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- C30B 15/22 Stabilisation or shape controlling of the molten zone near the pulled crystal; Controlling the section of the crystal since 1980 IPC+CPC Available in IPC and CPC