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. 06, 2004
Filed:
May. 30, 2001
Yukihiko Shirakawa, Tokyo, JP;
Taku Takeishi, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
The invention aims to provide a method for preparing a composite substrate which has minimized surface asperities on a dielectric layer, which are otherwise developed under the influence of an electrode layer, unevenness upon printing, and surface roughness inherent to thick-film dielectrics, which eliminates a need for a polishing step, which is easy to manufacture, and which is applicable to the fabrication of a thin-film light-emitting device of high display quality, as well as the resulting composite substrate and a thin-film EL device using the same. The object is attained by a method for preparing a composite substrate, comprising the steps of forming at least an electrode and a green dielectric layer according to a thick-film technique on an electrically insulating substrate, thereby providing a composite substrate precursor, smoothing the surface of the precursor by WIP process, and firing to complete the composite substrate, as well as the resulting composite substrate and a thin-film EL device using the same.