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

Claim 19:
20. A method of depositing one or more variable interference filters onto one or more substrates, the method comprising: at least one magnetron sputtering device sputtering material from a sputtering target to thereby define a sputtering zone within a vacuum chamber; at least one mount moving the one or more substrates through the sputtering zone; providing at least one static sputtering mask between the sputtering target and the mount, the at least one static sputtering mask being configured to take into account the angular distribution of the sputtered material such that a variable interference filter comprising a layer of material having a non-uniform thickness is deposited on each substrate moved through the sputtering zone; and depositing two variable interference filters on opposing faces of the substrate wherein the thicknesses of the filters vary in opposite orientations along the same axis, and the method further comprising at least one plasma processing device directing gas ions generated by a plasma towards the mount, thereby defining a plasma treatment zone within the vacuum chamber.