Patents Assigned to Ramax Semiconductor, Inc.
  • Patent number: 5796670
    Abstract: A nonvolatile memory cell for a random access memory device is provided. The invented memory cells are similar in configuration to the memory cells of known DRAM devices, so that DRAM devices embodying the invented cells may replace existing DRAM devices. The invented nonvolatile cell also affords a memory device that has low cost of manufacture, high data storage capacity, and low power consumption. Each memory cell includes a floating layer of polysilicon that is interposed between a reference voltage source and a node polysilicon. The floating polysilicon provides nonvolatile storage of data previously stored on the node polysilicon. An electron charge stored on the node polysilicon is transferred to the floating polysilicon, using known electron tunneling methods, before power to the device is removed, so that the data is not lost.
    Type: Grant
    Filed: November 7, 1996
    Date of Patent: August 18, 1998
    Assignee: Ramax Semiconductor, Inc.
    Inventor: Kwo-Jen Liu