Patent ID: 11960213
Assignee: ASML NETHERLANDS B.V.
Field: Optics (Instruments)
Classification: CPC G  B  Y | IPC B  G

Claim 0:
1. A substrate holder for use in a lithographic apparatus, the substrate holder comprising:
a main body having a first side of the main body and a second side of the main body opposite to the first side;
a plurality of first burls at the first side of the main body and having end surfaces to support a substrate in the lithographic apparatus, wherein each of the first burls comprises a lower body portion protruding from the main body and an upper body portion above the lower body portion, wherein the lower body portions are a different material than the upper body portions, and wherein the upper body portions comprise a material selected from: diamond, diamond-like carbon, SiC, SiO2, TiN, cubic boron nitride, silicon nitride, titanium, titanium carbide, cordierite or aluminum nitride; and
a plurality of second burls at the second side of the main body,
wherein the main body is grounded.