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:
Jan. 17, 1984
Filed:
Feb. 18, 1981
Applicant:
Inventor:
Hideaki Takehara, Yokohama, JP;
Assignee:
Victor Company of Japan, Limited, Yokohama, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
358126 ; 358151 ;
Abstract
A stylus for use in detecting signals as electrostatic capacitance variations of the information recorded in the form of geometric variations on a surface of a recording disc comprises a diamond body and a stylus electrode formed on a surface of the diamond body by depositing a conductive substance having a strong affinity to carbon and heating the deposited diamond body to an elevated temperature to allow the carbon atoms of the diamond body to diffuse into the deposited conductive region to form a carbide compound. Hafnium, titanium or tantalum is found suitable as the conductive substance.