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filingDate 2006-07-27-04:00^^<http://www.w3.org/2001/XMLSchema#date>
grantDate 2011-10-04-04:00^^<http://www.w3.org/2001/XMLSchema#date>
inventor http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6610f66f6cb18f0d502bd7a23a94ea9a
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publicationDate 2011-10-04-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber US-8029903-B2
titleOfInvention Silicon nitride substrate, silicon nitride circuit board utilizing the same, and use thereof
abstract Provided are a silicon nitride substrate and a silicon nitride circuit board with excellent electrical characteristics, and power control parts utilizing them. n A silicon nitride substrate comprises a silicon nitride sintered body obtainable by sintering a silicon nitride powder in the presence of a sintering aid comprising MgO, Y 2 O 3 and SiO 2 in a proportion of (1) MgO/(MgO+SiO 2 )=34-59 mol %, and (2) Y 2 O 3 /(Y 2 O 3 +SiO 2 )=50-66 mol %, and a silicon nitride circuit board utilizes it.
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