Patent ID: 9678445
Date: 2017-06-13
CPC Classifications: C23C,G03F,H01L,Y10T

Claim:
1. A method of manufacturing a substrate holder for use in a lithographic apparatus, the method comprising: providing a main body having a surface and a plurality of burls projecting from the surface and having end surfaces to support a substrate; applying a planarization layer on the surface of the main body and the burls so as to form a continuous layer, wherein the planarization layer comprises a first surface and a second surface opposite the first surface, wherein the first surface of the planarization layer fills in roughness of the surface of the main body between the burls and the surface roughness of the second surface is less than the surface roughness of the first surface; removing a part of the planarization layer from the end surfaces of the burls such that the planarization layer is arranged on at least part of the surface of the main body and not covering at least the end surfaces of the burls; and forming an electrical component on the planarization layer.