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US 12,522,920 B2Granted
Partial coating of intraocular lenses using spatial atomic layer deposition
AssigneeAMO Groningen B.V.
InventorsMartin Dinant Bijker, Emerentius Marie Josephus Antonius Van Dijk, Theophilus Bogaert, Klaas Sikkens
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Abstract
A system and method for efficiently modifying the surface of an intraocular lenses to reduce tackiness and improve lens unfold time and unfold time consistency, and a product created using the system and method, is disclosed. In some embodiments, the system and method utilizes at least part of a lens-forming device as a mask.
Claims11
A method for coating an intraocular lens, the intraocular lens having a lens surface, the method comprising:
- delivering the intraocular lens to a conveyor, the intraocular lens positioned within an interior space set into a top surface of a substrate holder such that the intraocular lens is positioned below the top surface of the substrate holder;
- activating a processing device, the processing device comprising a plurality of coating segments, each coating segment comprising:
- a first inert gas source configured to provide a first inert gas directly to the intraocular lens on the conveyor, a precursor source configured to provide a precursor gas directly to the intraocular lens on the conveyor;
- a second inert gas source configured to provide a second inert gas to the intraocular lens on the conveyor;
- and a plasma source configured to provide plasma to the intraocular lens on the conveyor;
- wherein the first inert gas source, the precursor source, the second inert gas source, and the plasma source of each coating segment are separated from the top surface of the substrate holder by a process gap;
- adding a first layer of coating by passing the intraocular lens from the conveyor through a first coating segment of the processing device using relative movement between the processing device and the conveyor, adding the first layer of coating comprising the steps of:
- delivering the first inert gas into the interior space and to the intraocular lens via the first coating segment;
- delivering the precursor gas into the interior space and to the intraocular lens via the first coating segment, subsequent to providing the first inert gas;
- delivering the second inert gas into the interior space and to the intraocular lens via the first coating segment, subsequent to providing the precursor gas;
- and delivering the plasma into the interior space and to the intraocular lens via the first coating segment, subsequent to providing the second inert gas;
- and adding a second layer of coating by passing the intraocular lens via the conveyor through a second coating segment of the processing device directly after the first coating segment, adding the second layer of coating comprising the steps of:
- delivering the first inert gas into the interior space and to the intraocular lens via the second coating segment, subsequent to adding the first layer of coating;
- delivering the precursor gas into the interior space and to the intraocular lens via the second coating segment, subsequent to providing the first inert gas;
- delivering the second inert gas into the interior space and to the intraocular lens via the second coating segment, subsequent to providing the precursor gas;
- and delivering the plasma into the interior space and to the intraocular lens via the second coating segment, subsequent to providing the second inert gas, wherein a layer of coating is applied to the intraocular lens each time the intraocular lens passes under a coating segment.
13 more elements
Dependencies are inferred from the claim text.