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:
Apr. 24, 1990
Filed:
Oct. 03, 1988
Applicant:
Inventors:
Masao Nakaya, Itami, JP;
Yasutaka Horiba, Itami, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 68 ; 357 40 ;
Abstract
The present invention is directed to an integrated circuit having multilayer structure. In the present invention, dummy elements having no relation to the operation of an integrated circuit are formed on the upper surface of a substrate provided with the integrated circuit by the same material as that for the substrate, to thereby prevent the integrated circuit provided on the substrate from direct and correct observation. As the result, formation arrangement etc. of the integrated circuit cannot be easily analyzed, whereby interests of those contributing to technology development can be sufficiently protected.