Patent ID: 11908678
Assignee: APPLIED MATERIALS, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC G  H | IPC H

Claim 13:
14. A semiconductor structure comprising:
a semiconductor substrate;
a metal layer overlying the semiconductor substrate;
a spacer layer overlying the metal layer;
a mirror layer overlying the spacer layer;
a fill material filling a contact hole formed in the mirror layer, the fill material substantially level with an upper surface of the mirror layer, the upper surface of the mirror layer characterized by an average roughness less than 5 nm; and
an optical stack overlying the mirror layer and the fill material, wherein the optical stack comprises a distributed Bragg reflector (DBR) that forms an interface with the mirror layer and the fill material, and the DBR is characterized by a reflectance exceeding 95% across a wavelength range of 450 nm-650 nm.