MONOLITHIC INTEGRATED CIRCUITS WITH MULTIPLE TYPES OF EMBEDDED NON-VOLATILE MEMORY DEVICES

    公开(公告)号:US20190386062A1

    公开(公告)日:2019-12-19

    申请号:US16464023

    申请日:2016-12-27

    Inventor: YIH WANG

    Abstract: Circuits are described that use metallization on both sides techniques to integrate two different types of non-volatile embedded memory devices within a single monolithic integrated circuit device. In an embodiment, a monolithic integrated circuit structure is provided that includes a device layer having one or more logic transistors. A front side interconnect layer is provided above the device layer, as seen in a vertical cross-section taken through the monolithic integrated circuit from top to bottom. A back side interconnect layer is provided below the device layer, as seen in the vertical cross-section. A first type of non-volatile memory device is provided in the front side interconnect layer, and a second type of non-volatile memory device different from the first type of non-volatile memory device is provided in the back side interconnect layer. A back side contact may be used to connect the device layer to a back side interconnect layer.

    THIN-FILM TRANSISTOR EMBEDDED DYNAMIC RANDOM-ACCESS MEMORY

    公开(公告)号:US20190326299A1

    公开(公告)日:2019-10-24

    申请号:US16474885

    申请日:2017-04-04

    Inventor: YIH WANG

    Abstract: An embedded dynamic random-access memory cell includes a wordline to supply a gate signal, a selector thin-film transistor (TFT) above the wordline and that includes an active layer and is configured to control transfer of a memory state of the memory cell between a first region and a second region of the active layer in response to the gate signal, a bitline to transfer the memory state and coupled to and above the first region of the active layer, a storage node coupled to and above the second region of the active layer, and a metal-insulator-metal capacitor coupled to and above the storage node and configured to store the memory state. In an embodiment, the wordline is formed in a back end of line process for interconnecting logic devices formed in a front end of line process below the wordline, and the selector TFT is formed in a thin-film process.

    TECHNIQUES FOR FORMING LOGIC INCLUDING INTEGRATED SPIN-TRANSFER TORQUE MAGNETORESISTIVE RANDOM-ACCESS MEMORY

    公开(公告)号:US20190081233A1

    公开(公告)日:2019-03-14

    申请号:US16073687

    申请日:2016-04-01

    Abstract: Techniques are disclosed for forming a logic device including integrated spin-transfer torque magnetoresistive random-access memory (STT-MRAM). In accordance with some embodiments, one or more magnetic tunnel junction (MTJ) devices may be formed within a given back-end-of-line (BEOL) interconnect layer of a host logic device. A given MTJ device may be formed, in accordance with some embodiments, over an electrically conductive layer configured to serve as a pedestal layer for the MTJ's constituent magnetic and insulator layers. In accordance with some embodiments, one or more conformal spacer layers may be formed over sidewalls of a given MTJ device and attendant pedestal layer, providing protection from oxidation and corrosion. A given MTJ device may be electrically coupled with an underlying interconnect or other electrically conductive feature, for example, by another intervening electrically conductive layer configured to serve as a thin via, in accordance with some embodiments.

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