Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2003-07-30
2009-11-24
McNeil, Jennifer (Department: 1794)
Stock material or miscellaneous articles
Composite
Of inorganic material
Reexamination Certificate
active
07622203
ABSTRACT:
Provided is an aluminum nitride sintered body having a larger area and a smaller thickness as compared to the conventional art, wherein the aluminum nitride sintered body has flatness with controlled warpage and/or waviness height. Methods of producing such sintered body, and further a metallized substrate and a heater using such sintered body are also provided. An aluminum nitride substrate1has a maximum length of 320 mm or more, a thickness of more than 0 mm and 2 mm or less, a warpage of 0 μm/mm or more and less than 2 μm/mm, and a local waviness height of 0 μm or more and 100 μm or less.
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European Search Report issued in European Patent Application No. EP 03 78 8020, mailed Oct. 29, 2008.
Office Action, Mar. 17, 2006.
Ishidu Sadamu
Itoh Yasushi
Tsuzuki Yasushi
McDermott Will & Emery LLP
McNeil Jennifer
Miller Daniel
Sumitomo Electric Industries Ltd.
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