Plastic substrate having a porous layer and method for producing the porous layer
AssigneeFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsUlrike Schulz, Peter Munzert, Matthias Fahland, Waldemar Schoenberger
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Abstract
A plastic substrate having a porous layer is disclosed. In an embodiment, the porous layer is formed at least partially from a material of the plastic substrate and has pores. The proportion by volume of pores is greater in a first region of the porous layer than in a second region of the porous layer. The second region follows the first region, as seen proceeding from the plastic substrate. The porous layer can be produced by a plasma process that simultaneously effects structuring of the plastic substrate by ion bombardment and coating of the plastic substrate.
Claims8
A plastic substrate comprising:
- a porous layer on a surface,
- wherein the porous layer is formed at least partially from a material of a plastic substrate and has pores,
- wherein a proportion by volume of the pores is greater in a first region of the porous layer than in a second region of the porous layer,
- wherein the first region is located between the second region and the plastic substrate,
- wherein the porous layer has a thickness of between 50 nm and 500 nm,
- wherein the pores, on average, have a lateral extent of between 20 nm and 200 nm, and
- wherein a solid phase of the porous layer is formed to an extent of at least 10% from the material of the plastic substrate.
Dependencies are inferred from the claim text.