Surface having specially formed recesses and component

Abstract

A surface having specially formed recesses and component is provided. The component has a layer with a surface, having elongate recesses, which have a longitudinal direction, wherein the recesses are arranged at an angle which differs considerably from 0°, in particular 90°+/−20°, with respect to a direction of overflow over the surface, and are at least partially widened transversely to the longitudinal direction thereof in the region of the surface with respect to the base of the recess, in which the recess is widened proceeding from the base only above a certain height within the recess, and in particular the recess has a constant width before it, in which the recess does not extend through the entire thickness of the layer.

1 .- 11 . (canceled) 
     
     
         12 . A component having a layer with a surface, comprising
 elongate recesses, which have a longitudinal direction, wherein the recesses are arranged at an angle which differs considerably from 0°, with respect to a direction of overflow over the surface, and are at least partially widened transversely to the longitudinal direction thereof in the region of the surface with respect to the base of the recess,   wherein the recess is widened proceeding from the base only above a certain height within the recess, and   wherein the recess does not extend through the entire thickness of the layer.   
     
     
         13 . The component as claimed in  claim 12 ,
 wherein the recess has a front edge and a rear edge, and   wherein the widened portion is formed at the rear edge.   
     
     
         14 . The component as claimed in  claim 12 ,
 wherein the recess has a rectangular cross section at least in certain points transversely to the longitudinal direction as far as the widened portion.   
     
     
         15 . The component as claimed in  claim 12 ,
 wherein the recesses are arranged at an angle of 90°+/−20° with respect to a direction of overflow over the surface.   
     
     
         16 . The component as claimed in  claim 12 , wherein the recess has a corrugated form along the longitudinal direction. 
     
     
         17 . The component as claimed in  claim 12 ,
 wherein the widened portion has a cross section which is at least 10% larger than that of the base.   
     
     
         18 . The component as claimed in  claim 12 ,
 wherein the component is in the form of a surface of a solid component.   
     
     
         19 . The component as claimed in  claim 12 ,
 wherein the component is in the form of a ceramic layer.   
     
     
         20 . The component as claimed in  claim 12 ,
 wherein the front edge extends virtually perpendicular to the surface.   
     
     
         21 . The component as claimed in  claim 12 , wherein the surface comprises a ceramic surface. 
     
     
         22 . The component as claimed in  claim 12 , wherein the angle is 90°+/−20°. 
     
     
         23 . The component as claimed in  claim 12 , wherein the recess has a constant width before the certain height. 
     
     
         24 . The component as claimed in  claim 13 , wherein the widened portion is formed at the outflow-side end. 
     
     
         25 . The component as claimed in  claim 14 , wherein the recess has a completely rectangular cross section transverse to the longitudinal direction as far as the widened portion. 
     
     
         26 . The component as claimed in  claim 16 , wherein the recess has an s shape along the longitudinal direction.