NV (nonvolatile) storing device

Abstract

The invention provides an NV (nonvolatile) storing device, comprising a memory cell array; each memory cell can store multi-bit data and comprises a programmable transistor which is connected with a resistance switching device; a threshold voltage of each transistor can be switched among multiple different threshold voltages associated with each storage state; and the resistance switching device can be switched among multiple different resistances associated with each storage state.

Description

technical field [0001] The present invention relates to an electronic memory device, and more particularly to a semiconductor memory device suitable as a non-volatile memory device. Background technique [0002] Electronic storage devices are well known and found in a variety of electronic systems. For example, in computers and other computing devices there is electronic storage (sometimes referred to as computer memory). Many removable or self-contained electronic storage devices such as memory cards or solid state data storage systems are well known. For example, a removable memory card can be used in a digital camera to store photos or a digital video recorder can be used to store movies recorded by a digital video recorder. [0003] Most electronic storage devices can be classified as either volatile or non-volatile. In general, volatile electronic storage devices require power to maintain stored information. Examples of volatile electronic storage devices are Static...

AI Technical Summary

Problems solved by technology

However, some projections show that the cost of bits using this approach will increase in the future, as at some point the process cost will increase faster than the memory cell shrink rate

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