Patent ID: 11891686
Assignee: nan
Field: Surface technology, coating (Chemistry)
Classification: CPC C  G  H | IPC C  G  H

Claim 16:
17. The method according to claim 12, comprising at least first magnetron sputtering device sputtering metal from a first sputtering target comprising metal, thereby defining a metal sputtering zone within the vacuum chamber, the second magnetron sputtering device sputtering non-metal or metalloid from a second sputtering target comprising non-metal or metalloid, thereby defining a non-metal or metalloid sputtering zone within the vacuum chamber, the at least one mount moving the one or more substrates through each said sputtering zone, providing a first static sputtering mask located between the first sputtering target and the mount, the first sputtering mask being configured to take into account the angular distribution of the sputtered metal such that a layer of metal material having a non-uniform thickness is deposited on each substrate moved through the metal sputtering zone, providing a second static sputtering mask located between the second sputtering target and the mount, the second sputtering mask being configured to take into account the angular distribution of the sputtered non-metal or metalloid such that a layer of non-metal or metalloid material having a non-uniform thickness is deposited on each substrate moved through the non-metal or metalloid sputtering zone, and wherein the deposition is repeated to deposit one or more variable interference filters onto one or more substrates such that each filter comprises alternating layers of metal and non-metal or metalloid materials, and each of the alternating layers is of non-uniform thickness.