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:
May. 08, 2018
Filed:
May. 29, 2015
Hitachi Chemical Company, Ltd., Tokyo, JP;
Shigeru Yoshikawa, Hitachi, JP;
Munehiro Oota, Hitachi, JP;
Takaaki Tanaka, Hitachi, JP;
Takashi Shinoda, Albany, NY (US);
HITACHI CHEMICAL COMPANY, LTD., Tokyo, JP;
Abstract
One embodiment of the present invention relates to a polishing liquid for CMP containing cerium oxide particles and water, wherein the half-value width of the main peak appearing within a range from 2θ=27.000 to 29.980° in a powder X-ray diffraction chart of the cerium oxide particles is from 0.26 to 0.36°, the average particle size of the cerium oxide particles is at least 130 nm but less than 175 nm, and the number of cerium oxide particles having a particle size of 1.15 μm or greater is 5000×10/mL or less.