ROLLER FOR TRANSPORTING A FLEXIBLE SUBSTRATE, VACUUM PROCESSING APPARATUS, AND METHODS THEREFOR
A roller for transporting a flexible substrate is described. The roller includes a main body having a plurality of gas supply slits provided in an outer surface of the main body. The plurality of gas supply slits extends in a direction of a central rotation axis of the roller. Further, the roller includes a sleeve provided circumferentially around and in contact with the main body. The sleeve has a plurality of gas outlets extending in a radial direction (R) and being provided above the plurality of gas supply slits.
1 . A roller for transporting a flexible substrate, comprising
a main body having a plurality of gas supply slits provided in an outer surface of the main body, the plurality of gas supply slits extending in a direction of a central rotation axis of the roller; and
a sleeve provided circumferentially around and in contact with the main body, the sleeve having a plurality of gas outlets extending in a radial direction (R) and being provided above the plurality of gas supply slits.
2 . The roller of claim 1 , wherein a density of the plurality of gas outlets changes towards at least one of a first axial end and a second axial end of the roller.
3 . The roller of claim 1 , wherein the density of the plurality of gas outlets increases, particularly gradually increases, towards at least one of a first axial end and a second axial end of the roller.
4 . The roller of claim 1 , wherein the plurality of gas outlets comprises at least a first subgroup of gas outlets having a first density and a second subgroup of gas outlets having a second density being different from the first density.
5 . The roller of claim 4 , wherein the second density is higher than the first density, and wherein the second subgroup of gas outlets is provided at one or both axial end portions of the sleeve.
6 . The roller of claim 4 , the plurality of gas outlets further comprising a third subgroup of gas outlets having a third density being different from the first density and the second density, particularly the third density being lower than the first density and the second density, and the third subgroup of gas outlets being provided in a middle portion between axial end portions of the sleeve.
7 . The roller of claim 1 , wherein an outlet diameter of the plurality of gas outlets changes towards at least one of a first axial end and a second axial end of the roller.
8 . The roller of claim 1 , wherein an outlet diameter of the plurality of gas outlets increases, particularly gradually increases, towards at least one of a first axial end and a second axial end of the roller.
9 . The roller of claim 1 , wherein the plurality of gas outlets comprises at least a fourth subgroup of gas outlets having a first outlet diameter and a fifth subgroup of gas outlets having a second outlet diameter being different from the first outlet diameter.
10 . The roller of claim 9 , wherein the second outlet diameter is larger than the first outlet diameter, and wherein the fifth subgroup of gas outlets is provided at one or both axial end portions of the sleeve.
11 . The roller of claim 9 , the plurality of gas outlets further comprising a sixth subgroup of gas outlets having a third outlet diameter being different from the first outlet diameter and the second outlet diameter, particularly the third outlet diameter being smaller than the first outlet diameter and the second outlet diameter, and the sixth subgroup of gas outlets being provided in a middle portion between axial end portions of the sleeve.
12 . The roller of claim 1 , wherein the main body is a cylinder made of a material comprising copper, and wherein the sleeve is made of a metal sheet.
13 . A vacuum processing apparatus for processing a flexible substrate, comprising:
a processing chamber comprising a plurality of processing units comprising at least one deposition unit,
and a roller according to claim 1 for guiding the flexible substrate past the plurality of processing units, the roller being connected to a gas supply.
14 . A method of manufacturing a roller for guiding a flexible substrate, comprising
producing a sleeve having a plurality of gas outlets by using laser drilling; and
providing the sleeve circumferentially around and in contact with a main body of the roller having a plurality of gas supply slits provided in an outer surface of the main body such that the plurality of gas outlets are arranged above the plurality of gas supply slits.
15 . A method of processing a flexible substrate, comprising
guiding the flexible substrate past one or more processing units ( 221 ) by using a roller for transporting the flexible substrate according to claim 1 ; and
controlling a temperature of the flexible substrate by providing gas to the flexible substrate through the plurality of gas outlets of the roller.
16 . A method of manufacturing a coated flexible substrate, comprising using at least one of a roller according to claim 1 , a vacuum processing apparatus according to claim 13 , and a method of processing a flexible substrate according to claim 15 .