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. 19, 1999
Filed:
Mar. 30, 1998
Masashi Inata, Okazaki, JP;
Kahoru Mori, Nukata-gun, JP;
Katsuhiro Suzuki, Tokyo, JP;
Akiji Higuchi, Tokyo, JP;
Denso Corporation, Kariya, JP;
Toppan Printing Co., Ltd., Tokyo, JP;
Abstract
A pair of electrode panels are supported by plural spacer walls made of photo-resist resin to form a cell gap between electrode panels. The cell gap is filled with liquid crystal, preferably, antiferroelectric liquid crystal. The spacer walls are formed on an orientation layer formed on either panel. A thin layer is also formed on the orientation layer together with formation of the spacer walls as a residual layer. The residual layer has to be sufficiently thin not to disturb orientation of the liquid crystal and to attain a sufficiently high display contrast. The thickness of the residual layer is indirectly detected by an X-ray electron spectroscopy for chemical analysis (ESCA), and the residual layer is made sufficiently thin by setting a temperature of a preliminary baking process, which is carried out before formation of the spacer walls, in a proper range.