Patent ID: 11903329
Assignee: GOOGLE LLC
Field: Surface technology, coating (Chemistry)
Classification: CPC G  H  B  C | IPC B  G  H

Claim 0:
1. A method comprising:
providing a dielectric substrate and a multi-layer resist structure on a surface of the dielectric substrate,
wherein the multi-layer resist structure comprises a first photoresist layer including a first opening extending through a thickness of the first photoresist layer, a second photoresist layer including a second opening aligned over the first opening and extending through a thickness of the second photoresist layer, and a third photoresist layer including a third opening aligned over the second opening and extending through a thickness of the third photoresist layer,
wherein at least two photoresist layers of the multi-layer resist structure are in direct contact with one another,
wherein the thickness of each of the first opening, the second opening and the third opening extend along a first direction normal to the surface of the dielectric substrate,
each of the first opening, the second opening, and the third opening has a corresponding width that extends along a second direction that is orthogonal to the first direction, and
a width of the second opening is less than a width of the first opening and less than a width of the third opening.