Patent ID: 6277496
Filing Date: 2001-08-21
Classification: C23C,G02B,Y10S,Y10T

Abstract:
A form of packaging or packaging aid having integral guarantee of original pack or first-time opening, or original pack and first-time opening, containing a substrate (10) with a surface (11) that reflects visible light, the reflective surface (11) is composed of metal or is a metallic reflective surface, a single Ceramic layer (12) or a plurality of ceramic layers (12, 14, 16) are provided on the reflecting surface (11), the ceramic layer (12) or ceramic layers (12, 14, 16) comprise a compound having the formula SiO.sub.x, where x represents a number from 1.5 to 2.0, each ceramic layer has a thickness of 50 to 2000 nm (nanometers), the ceramic layer (12) is directly, nonreleasably affixed to the substrate (10) or to the reflective surface (11) of the substrate (10), and, on the ceramic layer (12) or the ceramic layers (12, 14, 16), a reflecting layer (13, 15, 17) which is semipermeable to visible light is provided, the layer (13, 15, 17) being of metal and having a thickness of 0.2 to 60 nm, and is such that light striking the coated substrate is reflected and seen as different colors depending on the direction or angle at which it is viewed by an observer.