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:
Jul. 18, 2006
Filed:
Feb. 18, 2000
Applicants:
Yasutaka Ito, Gifu, JP;
Yasuji Hiramatsu, Gifu, JP;
Inventors:
Yasutaka Ito, Gifu, JP;
Yasuji Hiramatsu, Gifu, JP;
Assignee:
Ibiden Co., Ltd., Ogaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
H05B 3/68 (2006.01);
U.S. Cl.
CPC ...
Abstract
A ceramic substrate for semiconductor manufacture and/or inspection which is conducive to decrease in α-rays radiated to prevent electrical errors, and to decrease an electrostatic chucking force such as heater or wafer prober, generation of particles, and circuit defects. The ceramic substrate is configured such that the level of α-rays radiated from the surface of the ceramic substrate is not higher than 0.250 c/cm.hr.