Thin film total internal reflection diffraction grating for single polarization or dual polarization
First Claim
Patent Images
1. A diffraction grating, comprising:
- a substrate;
an etch stop layer to prevent etching of the substrate,the etch stop layer being on the substrate;
a marker layer, comprising an etchable material, that indicates an etch end-point associated with etching of a dielectric layer,the marker layer being on a portion of the etch stop layer; and
the dielectric layer that forms a periodic grating layer after being etched,the dielectric layer being on at least the marker layer.
3 Assignments
0 Petitions
Accused Products
Abstract
A diffraction grating may include a substrate. The diffraction grating may include an etch stop layer to prevent etching of the substrate. The etch stop layer may be deposited on the substrate. The diffraction grating may include a marker layer to indicate an etch end-point associated with etching of a dielectric layer. The marker layer may be deposited on a portion of the etch stop layer. The diffraction grating may include the dielectric layer to form a grating layer after being etched. The dielectric layer may be deposited on at least the marker layer.
211 Citations
20 Claims
-
1. A diffraction grating, comprising:
-
a substrate; an etch stop layer to prevent etching of the substrate, the etch stop layer being on the substrate; a marker layer, comprising an etchable material, that indicates an etch end-point associated with etching of a dielectric layer, the marker layer being on a portion of the etch stop layer; and the dielectric layer that forms a periodic grating layer after being etched, the dielectric layer being on at least the marker layer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A diffraction grating, to operate based on total internal reflection, comprising:
-
a substrate; an etch stop layer to prevent etching of the substrate, the etch stop layer being on the substrate; a dielectric grating layer on the etch stop layer, the dielectric grating layer being a periodic grating; and an encapsulation layer to protect the dielectric grating layer, the encapsulation layer being on at least the dielectric grating layer, and the encapsulation layer comprising a planar surface that spans a width of the dielectric grating layer. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
-
15. A method of manufacturing a diffraction grating, the method comprising:
-
depositing an etch stop layer on a substrate; depositing a marker layer on a portion of the etch stop layer; depositing a dielectric layer on the marker layer; etching the dielectric layer to form a grating layer, during etching the dielectric layer, preventing, by the etch stop layer, etching of the substrate; and determining, based on etching the marker layer, that the etching the dielectric layer is to be stopped; and etching the marker layer to indicate an etch end-point associated with the etching of the dielectric layer. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification