Raised zone retroreflective cube corner article and method of manufacture

A method of manufacturing a cube corner article, comprising the steps of:

• (a) providing a substrate;
• (b) forming in a first zone of the substrate at least a first grove set;
• (c) forming in a second zone of the substrate a cavity at least as deep as the first groove set;
• (d) making a negative copy of the substrate such that the negative copy has a third zone patterned in accordance with the first zone and a fourth zone positioned at least as high as the third zone;
• and
• (e) forming additional grooves in the negative copy to form cube corner elements in at least the fourth zone.

A method of manufacturing a cube corner article, comprising the steps of:

• (a) providing a substrate;
• (b) forming in a first zone of the substrate a first array of cube corner elements bounded by a plurality of groove sets;
• (c) forming in a second zone of the substrate a cavity having a depth in the substrate below the plurality of groove sets;
• (d) producing a negative copy of the substrate such that the negative copy has a patterned zone of cube corner elements corresponding to the first zone and an elevated zone corresponding to the second zone;
• and
• (e) forming a second array of cube corner elements in the elevated zone.

A method of manufacturing a cube corner article, comprising the steps of:

• (a) providing a substrate having a definable first and second zone;
• (b) forming a first cube corner array selectively in the first zone;
• (c) making a negative copy of the substrate, the negative copy having a third zone with a structured surface corresponding to the first cube corner array, the negative copy also having a fourth zone corresponding to the second zone;
• and
• (d) forming a second cube corner array selectively in the fourth zone.