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. 19, 1995
Filed:
Jul. 14, 1994
Takashi Shirakawa, Iwate, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
The present invention relates to a thermal head and the manufacturing method. In the thermal head, even when a multilayer wiring constitution is adopted, a trouble caused by bad connection or bad insulation in respective layers can be certainly prevented, and even if a real edge constitution is adopted, manufacturing is easy and reliability can be maintained high. A heat insulating layer is formed in a position corresponding to that of a heating portion on a substrate; a conductive layer composed of a resistor material is formed on the upper surfaces of the substrate and the heat insulating layer; an insulating layer which is obtained in oxidizing the surface of the conductive layer with a thermal oxidation method is formed on the conductive layer except the area which corresponds to the positions of a common electrode and the terminal portion of the common electrode; predetermined heating resistors are formed so that their both end parts can be positioned on the upper side of the insulating layer and the conductive layer respectively; individual electrodes are formed in the edge portion of the upper surface of the heating resistors on the side of the insulating layer; and a common electrode is formed in the edge portion on the side of the conductive layer.