Phase-Change Material (PCM) Radio Frequency (RF) Switches

    公开(公告)号:US20200058856A1

    公开(公告)日:2020-02-20

    申请号:US16550119

    申请日:2019-08-23

    Abstract: A radio frequency (RF) switch includes a stressed phase-change material (PCM) and a heating element underlying an active segment of the stressed PCM and extending outward and transverse to the stressed PCM. In one approach, at least one transition layer is situated over the stressed PCM. An encapsulation layer is situated over the at least one transition layer and on first and second sides of the stressed PCM. A stressor layer is situated over the encapsulation layer and the said stressed PCM. Alternatively or additionally, contacts of the RF switch extend into passive segments of a PCM, wherein adhesion layers adhere the passive segments of the PCM to the contacts.

    Phase-Change Material (PCM) RF Switch Having Contacts to PCM and Heating Element

    公开(公告)号:US20200119265A1

    公开(公告)日:2020-04-16

    申请号:US16709823

    申请日:2019-12-10

    Abstract: In fabricating a radio frequency (RF) switch, a phase-change material (PCM) and a heating element, underlying an active segment of the PCM and extending outward and transverse to the PCM, are provided. Lower portions of PCM contacts for connection to passive segments of the PCM are formed, wherein the passive segments extend outward and are transverse to the heating element. Upper portions of the PCM contacts are formed from a lower interconnect metal. Heating element contacts are formed cross-wise to the PCM contacts. The heating element contacts can comprise a top interconnect metal directly connecting with terminal segments of the heating element. The heating element contacts can comprise a top interconnect metal and intermediate metal segments for connecting with the terminal segments of the heating element.

    Segmented Slot Contacts for Improving Performance in Phase-Change Material (PCM) Radio Frequency (RF) Switches

    公开(公告)号:US20200136042A1

    公开(公告)日:2020-04-30

    申请号:US16731487

    申请日:2019-12-31

    Abstract: A radio frequency (RF) switch includes a phase-change material (PCM) and a heating element underlying an active segment of the PCM, the PCM and heating element being situated over a substrate. A contact dielectric is over the PCM. PCM contacts have upper portions and uniform plate slot lower portions. The uniform plate slot lower portions have a total plate resistance RPLATE, and a total plate slot interface resistance RPLATE-INT. The upper portions have a total capacitance CUPPER to the uniform plate slot lower portions, and the PCM has a total capacitance CPCM to the substrate. The uniform plate slot lower portions significantly reduce a product of (RPLATE+RPLATE-INT) and (CUPPER+CPCM). As an alternative to the uniform plate slot lower portions, PCM contacts have segmented lower portions. The segmented lower portions significantly reduce CUPPER.

    Method of Manufacturing Phase-Change Material (PCM) Radio Frequency (RF) Switch Using a Chemically Protective and Thermally Conductive Layer

    公开(公告)号:US20200058853A1

    公开(公告)日:2020-02-20

    申请号:US16554492

    申请日:2019-08-28

    Abstract: A radio frequency (RF) switch includes a heating element, an aluminum nitride layer situated over the heating element, and a phase-change material (PCM) situated over the aluminum nitride layer. An inside segment of the heating element underlies an active segment of the PCM, and an intermediate segment of the heating element is situated between a terminal segment of the heating element and the inside segment of the heating element. The aluminum nitride layer situated over the inside segment of the heating element provides thermal conductivity and electrical insulation between the heating element and the active segment of the PCM. The aluminum, nitride layer extends into the intermediate segment of the heating element and provides chemical protection to the intermediate segment of the heating element, such that the intermediate segment of the heating element remains substantially unetched and with substantially same thickness as the inside segment.

    Method of Tuning a Radio Frequency (RF) Module Including a Non-Volatile Tunable RF Filter

    公开(公告)号:US20200169239A1

    公开(公告)日:2020-05-28

    申请号:US16775625

    申请日:2020-01-29

    Abstract: In tuning a radio frequency (RF) module including a non-volatile tunable RF filter, a desired frequency and an undesired frequency being provided by an amplifier of the RF module are detected. The non-volatile tunable RF filter is coupled to an output of the amplifier of the RF module. A factory setting of an adjustable capacitor in the non-volatile tunable RF filter is changed by factory-setting a state of a non-volatile RF switch, such that die non-volatile tunable RF filter substantially rejects die undesired frequency and substantially passes die desired frequency. The adjustable capacitor includes die non-volatile RF switch, and the factory setting of the adjustable capacitor corresponds to a factory-set state of the non-volatile RF switch. An end-user is prevented access to the non-volatile RF switch, so as prevent the end-user from modifying the factory-set state of the non-volatile RF switch.

    Semiconductor Chips and Systems Having Phase-Change Material (PCM) Switches Integrated with Micro-Electrical-Mechanical Systems (MEMS) and/or Resonators

    公开(公告)号:US20200058865A1

    公开(公告)日:2020-02-20

    申请号:US16402630

    申请日:2019-05-03

    Abstract: A semiconductor chip or system, such as a multi-chip module (MCM), a system-in-package (SiP), and/or a printed circuit board (PCB) module, includes a substrate, a resonator and/or a micro-electrical-mechanical system (MEMS), and a phase-change material (PCM) switch. The PCM switch includes a heating element, a PCM situated over the heating element, and PCM contacts connected to passive segments of the PCM. The heating element is transverse to the PCM and approximately defines an active segment of the PCM. The PCM contacts are electrically connected to the resonator and/or the MEMS in a shared routing region of the semiconductor chip. The PCM switch is configured to engage or disengage the resonator and/or the MEMS. In one approach, a plurality of PCM switches are capable of reconfiguring an array of resonators and/or an array of MEMS. In another approach, a redundant PCM switch is electrically connected to a redundant resonator and/or a redundant MEMS.

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