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PCE
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DIFF Subgroup
C01B 33/037

Purification (by zone-melting C30B13/00)

Introduced: January 1990

Title

Titles differ between systems:

IPC: Purification

CPC: Purification (by zone-melting C30B13/00)

Full Title

Full titles differ between systems:

IPC:

Silicon; Compounds thereof > Silicon > Purification

CPC:

Silicon; Compounds thereof ( C01B21/00, C01B23/00 take precedence; persilicates C01B15/14; carbides C01B32/956) > Silicon (forming single crystals or homogeneous polycrystalline material with defined structure C30B) > Purification (by zone-melting C30B13/00)

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

IPC defines codes here since 1990.

Child Classifications

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  • C01B 33/039 by conversion of the silicon into a compound, optional purification of the compound, and reconversion into silicon since 1990 IPC+CPC Available in IPC and CPC