Patent ID: 11864947
Assignee: KONINKLIJKE PHILIPS N.V.
Field: Measurement (Instruments)
Classification: CPC A  B  G  H | IPC A  G  H

Claim 15:
16. A capacitive radio frequency micro-electromechanical switch (RFMEMS), comprising:
a substrate;
a first electrode connected to the substrate;
a flexible membrane at least partially spatially separated from the first electrode;
a second electrode connected to the flexible membrane, wherein a bias voltage applied to the first electrode of the capacitive RFMEMS an electric field between the first and second electrode is adapted to drive the capacitive RFMEMS into a collapse mode, and a stimulus voltage applied to the second electrode increases an electric field between the first and second electrode; and
a dielectric stack disposed between the first electrode and the second electrode and flexible membrane, comprising: a first dielectric layer; and a second dielectric layer, the first dielectric layer being polarized to a first degree of polarization and the second dielectric layer to a second degree of polarization, lower than the first degree, causing a negative drift in the bias voltage between the first and second electrodes, wherein: space charges are oriented within the first dielectric layer to a first level of orientation and within the second dielectric layer to a second level of orientation, which is greater than the first level, thereby causing a positive drift in the bias voltage between the first and second electrodes; and an overall drift in bias voltage is reduced between the first and second electrodes.