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1. WO2020112022 - SYSTEMS AND DEVICES FOR CONTINUOUS MAGNETIC NANOIMPRINTING

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[ EN ]

CLAIMS

What is claimed is:

1. A system for continuous roll-to-roll imprinting comprising:

an embossing drum; and

an imprinting mold,

wherein the embossing drum includes an inner magnetic core for mechanically inducing a magnetic force at an outer surface of the embossing drum, and

wherein the imprinting mold magnetically adheres to the embossing drum in response to the magnetic force.

2. The system according to Claim 1 wherein the magnetic force is in the range of 1620 Gauss and 1980 Gauss.

3. The system according to Claim 2 wherein the magnetic force is 1800 Gauss.

4. The system according to any of the preceding claims wherein the imprinting mold comprises nickel film or nickel plate.

5. The system according to any of the preceding claims wherein a surface of the imprinting mold has a surface smoothness in the range of 0.2 microns to 0.8 microns.

6. The system according to any of the preceding claims wherein the embossing drum comprises a gap between the outer surface of the embossing drum and the inner magnetic core.

7. The system according to Claim 6 wherein the gap between the outer surface of the embossing drum and the inner magnetic core is in the range of 0.1mm to 0.5mm.

8. The system according to any of the preceding claims wherein the inner magnetic core comprises a plurality of magnets in a Halbach array such that poles of each of the plurality of magnets pointing towards the outer surface of the embossing drum are a single polarity.

9. The system according to Claim 8 wherein each of the plurality of magnets of the inner magnetic core comprise Neodymium iron boron (NdFeB) or Samarium Cobalt (SmCo).

10. The system according to any of the preceding claims wherein the continuous roll-to-roll imprinting comprises continuous roll-to-roll nanoimprinting or continuous roll-to-roll microimprinting.

11. The system according to any of the preceding claims wherein the continuous roll-to-roll imprinting comprises ultraviolet roll-to-roll imprinting or thermal roll-to-roll imprinting.

12. An embossing drum for continuous roll-to-roll nanoimprinting, the drum comprising:

an inner magnetic core; and

a drum outer surface, wherein the inner magnetic core mechanically induces a magnetic force at the drum outer surface, and wherein a gap is defined between the inner magnetic core and the drum outer surface having a gap distance 0.1mm to 0.5mm.

13. The embossing drum according to Claim 12 wherein the inner magnetic core induces a magnetic force in the range of 1620 Gauss and 1980 Gauss.

14. The embossing drum according to Claim 13 wherein the inner magnetic core induces a magnetic force of 1800 Gauss.

15. The embossing drum according to any of Claims 12 to 14 wherein the gap distance is in the range of 0.25mm to 0.35mm.

16. The embossing drum according to any of Claims 12 to 15 wherein the drum outer surface comprises steel.

17. The embossing drum according to any of Claims 12 to 16 wherein the inner magnetic core comprises a plurality of magnets in a Halbach array such that poles of each of the plurality of magnets pointing towards the drum outer surface are a single polarity.

18. The embossing drum according to Claim 17 wherein the plurality of magnets are arranged with north (N) polarity poles and south (S) polarity poles in an alternating arrangement of N-S-N-S.

19. The embossing drum according to Claims 17 or Claim 18 wherein the plurality of magnets are arranged with north (N) polarity poles and south (S) polarity poles in an alternating arrangement of N-N-S-S.

20. The embossing drum according to any of Claims 17 to 19 wherein each of the plurality of magnets have one or more of the following properties: a remanence (BR) of 1000 to 1200 mT (10 to 11 KGS), a coercive force (HcB) of 760 to 850 kA/m (-9.5 to -10.5 kOe), an intrinsic coercive force (Hcj) of 1900 to 2600 kOe (-25 to -34 kOe), a maximum energy product of 200 to 270 max (25-30 BH), or a maximum operating temperature of 180°C to 230°C.

21. The embossing drum according to Claim 20 wherein each of the plurality of magnets of the inner magnetic core comprise Neodymium iron boron (NdFeB) or Samarium Cobalt (SmCo).