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

Claim 11:
12. 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, wherein the mount is a drum comprising one or more apertures; providing at least one deposition sensor and rotating the drum such that the material sputtered by the at least one magnetron sputtering device reaches and is deposited onto the at least one deposition sensor when said one or more apertures are provided directly between the at least one deposition sensor and the at least one magnetron sputtering device and that the material sputtered by the at least one magnetron sputtering device is prevented from being deposited onto the at least one deposition sensor when said one or more apertures are rotated out of alignment with the at least one magnetron sputtering device; and 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 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.