Roll-to-roll processing

A system for roll-to-roll deposition comprising:

• a substrate transport system comprising a static elongated central cylinder for helical transport of a flexible substrate, the flexible substrate being arranged in a helical manner around the central cylinder, the central cylinder comprising bearing structures arranged in or arranged on a surface of the central cylinder for frictionless or low-friction transport of the flexible substrate over the surface of the central cylinder;
• and,
• one or more processing heads, each processing head being configured as a hollow cylinder, the one or more processing heads comprising at least one deposition head, an inner surface of the at least one deposition head including atomic layer deposition structures for depositing atomic layers onto the flexible substrate;
• wherein an inner radius of the one or more processing heads is larger than an outer radius of the central cylinder, the one or more processing heads being configured to rotate around the central cylinder, and
• wherein a longitudinal axis of a processing head coincides with the longitudinal axis of the central cylinder.