The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 26, 2017
Filed:
Jun. 10, 2013
Applicant:
Konica Minolta, Inc., Chiyoda-ku, JP;
Inventors:
Assignee:
KONICA MINOLTA, INC., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K 3/14 (2006.01); C01F 17/00 (2006.01); C09G 1/02 (2006.01); B24B 37/00 (2012.01); H01L 21/304 (2006.01); B24D 3/00 (2006.01);
U.S. Cl.
CPC ...
C09K 3/1436 (2013.01); C01F 17/0043 (2013.01); C09G 1/02 (2013.01); C09K 3/1409 (2013.01); C09K 3/1463 (2013.01); B24B 37/00 (2013.01); B24D 3/00 (2013.01); H01L 21/304 (2013.01);
Abstract
In order to use less cerium oxide and achieve higher durability and polishing speeds, these abrasive particles used in an abrasive have: a shell layer () which is the outermost shell layer of the abrasive particles and is formed with cerium oxide as the main component; and a middle layer () which contains cerium oxide and an oxide of at least one element selected from Al, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Zr, In, Sn, Y, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, W, Bi, Th, and the alkali earth metals, and which is formed closer to the center of the abrasive particles than the shell layer ().