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This guide covers a nondestructive procedure to determine the form of clean, dry sapphire substrates.
Formerly under the jurisdiction of Committee F01 on Electronics and Subcommittee F01.15 on Compound Semiconductors, this guide was withdrawn in July 2011 without replacement due to its limited use by the industry.
1.1 This guide covers a nondestructive procedure to determine the form of clean, dry sapphire substrates.
1.2 This guide is applicable to substrates 25 mm or larger in diameter, with a minimum thickness of 100 μm. This guide is independent of surface finish.
1.3 The measurements described in this guide may be applied to the entire global surface of the substrate, or to smaller localized areas.
1.4 The value of the measurements described in this guide will be affected by the amount of edge exclusion (that is, the area around the perimeter of the part which is ignored). The amount excluded should be agreed upon by the producer and consumer using this standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory requirements prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
SEMI StandardM3 Specifications for Polished Monocrystalline Sapphire Substrates
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ASTM F2358-04, Standard Guide for Measuring Characteristics of Sapphire Substrates, ASTM International, West Conshohocken, PA, 2004, www.astm.orgBack to Top