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:
Sep. 29, 1981
Filed:
May. 17, 1979
Werner Cirkler, Ismaning, DE;
Hans Krueger, Munich, DE;
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Abstract
A liquid crystal cell having a pair of carrier plates spaced apart to form a chamber for receiving a layer of liquid crystal material, each of the carrier plates having an electrical conductive coating or layer forming the electrodes on the surface facing the chamber with the surface of the electrodes being flush with the surface of an insulating material. The insulating material may be an additional layer of material disposed with the electrical conductive coating on the carrier plate or may be the carrier plate with the conductive coating being placed in recesses which have a depth equal to the thickness of the conductive coating. To form the recesses, a mask is applied to the surface of the carrier plate which is then etched, a conductive coating is applied on the remaining portions of the mask and in the recesses and then the mask is stripped with the coating thereon. When the coating and an insulating coating are applied on the carrier plate, a coating of electrical conductive material is applied on the surface of the carrier plate, a mask is applied, those portions of the coating which are not necessary to form the electrode structure are removed, a second coating of insulating material is applied in the areas where the electrical conductive coating was removed and then the mask is removed with the portion of the coating disposed thereon.