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secondary flat definition

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a flat of length shorter than the primary orientation flat, whose position with respect to the primary orientation flat identifies the type and orientation of the wafer. DISCUSSION-In some cases, one or more nonstandard "secondary" flats are specified to identify other attributes of the wafer. [ASTM F1241] Also called minor flat.

See also:

Seeback effect definition
Seebeck emf definition
sampling time definition
segregation of gases definition
sampling number definition