Patent ID: 11964866
Assignee: QORVO US, INC.
Field: Micro-structural and nano-technology (Chemistry)
Classification: CPC B  H | IPC B

Claim 0:
1. A method of forming a microelectromechanical device, comprising:
depositing and patterning a first layer on a backplane comprising at least two electrodes;
forming one or more electrical contacts over the first layer, wherein forming the one or more electrical contacts comprises:
depositing a first ruthenium layer over the first layer;
depositing a titanium nitride layer over the first ruthenium layer;
depositing a second ruthenium layer over the titanium nitride layer;
etching the second ruthenium layer with a first etchant;
etching the titanium nitride layer with a second etchant different than the first etchant; and
etching the first ruthenium layer with the first etchant;

forming a beam above the one or more electrical contacts, the beam being spaced from the one or more electrical contacts;
forming a top electrode above the beam; and
depositing a seal layer above the beam to enclose the beam in a cavity.