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:
Jun. 01, 1993
Filed:
Oct. 19, 1990
Joachim Szczyrbowski, Goldbach, DE;
Klaus Hartig, Ronneburg, DE;
Stephan Roegels, Rodenbach, DE;
Anton Zmelty, Hoesbach, DE;
Leybold Aktiengesellschaft, , DE;
Abstract
A coating, composed of an optically effective layer system for substrates, whereby the layer system has a high antireflective effect. On a front side of the substrate, facing the observer, in sequence from the front side to the observer, a first layer is arranged on the substrate, functioning as dielectric and comprising metal oxide. Thereupon follows a second layer comprising nitride, preferably TiN.sub.x (x is equal to or greater than 1, preferably x=1.05). A third layer follows functioning as dielectric and comprising metal oxide. Thereupon a fourth layer follows comprising nitride, preferably TiN.sub.x (x is equal to or greater than 1, preferably x=1.05). A fifth layer follows functioning as dielectric comprising metal oxide. On a backside of the substrate a TiN.sub.x -layer (x.gtoreq.1, preferably x=1.05) is arranged. The adequate selection of certain materials for the individual layers, of certain layer thicknesses and of a certain sequence of the individual layers results in a surprisingly good antireflective coating, contrast increase and antistatic effect. These good optical features of the layer system are reached with a small number of layers and with thin layer thicknesses. This, in turn, leads to an extremely cost saving manufacturing of the coating.