Substrate and method of manufacturing polygon flakes
View Patent ↗A method of forming pigment flakes includes using a deposition substrate having a plurality of regions; some of the regions are raised or lowered so that there is a level difference between each two adjacent regions. A coating deposited onto this substrate breaks along region borders when it is separated from the substrate. In one embodiment, the substrate includes first and second regions, wherein each of the first regions is in an abutting relationship with at least one of the second regions. All the first regions are at a first level and all the second regions are at a second level, and the difference between the first and second levels is greater than a predetermined value. The first and second regions are preferably square-shaped regions for manufacturing square flakes with practically no debris.
1. A method of forming pigment flakes comprising:
providing a substrate with a surface having a plurality of regions, some of the regions raised or lowered with respect to an average level plane associated with the surface, wherein, for each two regions in an abutting relationship, a level of a first of the two regions is different from a level of a second on the two regions;
providing a coating onto the substrate, wherein the thickness of the coating is greater than a difference between levels of regions of the substrate; and,
removing the coating from the substrate and breaking the coating along region borders into the pigment flakes, wherein shapes of the pigment flakes are predetermined shapes corresponding to shapes of the regions.
2. The method as defined in claim 1 wherein the plurality of regions comprises:
first regions at a first level with respect to the average level plane, and
second regions at a second level with respect to the average level plane, wherein the first level is different from the second level.
3. The method as defined in claim 2 wherein the plurality of regions comprises:
third regions at a third level with respect to the average level plane,
wherein the third level is different from the first and second levels.
4. The substrate as defined in claim 2 wherein a difference between the levels of the first and second regions is at least 50 nm.
5. The method as defined in claim 2 wherein a difference between the levels of the first and second regions is between 300 and 500 nm.
6. The method as defined in claim 1 wherein the regions are polygon-shaped regions.
7. The method as defined in claim 6 wherein the polygon-shaped regions are squares.
8. The method as defined in claim 6 wherein the polygon-shaped regions are hexagons.
9. The method as defined in claim 6 wherein the polygon-shaped regions are triangles.
10. The method as defined in claim 6 wherein the plurality of polygon-shaped regions comprises differently shaped regions.
11. The method as defined in claim 1 wherein at least some of the regions have markings.
12. The method as defined in claim 11 wherein, for each region having one of the markings, a depth or height of said markings is no greater than ⅔ of the difference in levels between the region having a particular marking and the adjacent regions.
13. The method as defined in claim 1 wherein the substrate has a release layer thereon.
14. The method as defined in claim 13 wherein the coating includes a second release layer.
15. The method of claim 1 wherein the coating is formed of one or more inorganic materials.