Patent ID: 11968881
Assignee: EMAGIN CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC H  B  C | IPC B  C  H

Claim 10:
11. A shadow mask that includes:
a substrate that defines a first plane, the substrate including a cavity; and
a composite layer that is disposed on the substrate, the composite layer having a membrane that is disposed over the cavity, wherein the membrane has a first lateral dimension and includes an aperture pattern comprising at least one aperture that extends completely through the composite layer, and wherein the composite layer comprises a plurality of layers that collectively define an effective residual stress of the composite layer, and wherein the plurality of layers are in intimate physical contact such that no layer of the plurality thereof can move independently of another layer of the plurality thereof;
wherein the plurality of layers includes a first layer comprising a first material, the first layer having a first thickness, a fracture stress based on the first lateral dimension, and a first residual stress that is greater than the fracture stress; and
wherein the effective residual stress is lower than the fracture stress.