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Standards GB - Chinese national standards - Page 8780
Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
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GB/T 6618-1995
WITHDRAWN
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Test method for thickness and total thickness variation of silicon slices
WITHDRAWN published on 18.4.1995
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GB 6619-1986
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Standard method for measuring bow of silicon slices
WITHDRAWN published on 1.1.1986
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GB/T 6619-1995
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Test methods for bow of silicon slices
WITHDRAWN published on 18.4.1995
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GB 662-1978
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WITHDRAWN published on 1.1.1978
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GB 6620-1986
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Standard method for measuring warp of silicon slices by noncontacting technique
WITHDRAWN published on 1.1.1986
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GB/T 6620-1995
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Test method for measuring warp on silicon slices by noncontact scanning
WITHDRAWN published on 18.4.1995
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GB 6621-1986
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Standard method for measuring surface flatness of polished silicon wafers by noncontact technique
WITHDRAWN published on 1.1.1986
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GB/T 6621-1995
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Test methods for surface flatness of silicon polished slices
WITHDRAWN published on 18.4.1995
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GB 6622-1986
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Detects of swirls and striations in chemically polished silicon wafers
WITHDRAWN published on 1.1.1986
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GB 6623-1986
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Standard method for measuring the surface O. S. F of polished silicon wafers
WITHDRAWN published on 1.1.1986
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