Widely adjustable optical functional layer e.g. as UV protection for plastic films glass textiles food - Effective UV-A protection from 320-470n

By means of a novel method it was possible to create by making full use of the Bowing effect against prevalent views a ternary compound whose absorption edge can be freely adjusted over a wide range and which features a sharp absorption edge (e.g. ZnOxS(1-x) with c. 320 470 nm 26-38eV UV-B range). To do so the novel method uses production methods which have already been established (thin layer deposition) particularly advantageous sputter and chemical deposition techniques.