Disposable programmable memory as well as programming method and reading method of memory

A memory, one-time technology, applied in static memory, read-only memory, information storage, etc., to achieve the effect of reducing the cost of use and the occupied area

Active Publication Date: 2014-03-19
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

OTP memory based on floating gate structure to store charge, such as NAND flash memory and NOR flash memo

Method used

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  • Disposable programmable memory as well as programming method and reading method of memory
  • Disposable programmable memory as well as programming method and reading method of memory
  • Disposable programmable memory as well as programming method and reading method of memory

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1

[0036] Such as figure 1 As shown, this embodiment provides a one-time programmable memory, which at least includes: a phase change memory unit 10, a write unit 20, a read unit 30, a read reference unit 40, and a bias unit 50, wherein:

[0037] The phase change storage unit 10 is used to store data to be written;

[0038] The writing unit 20 is connected to the phase change memory unit 10, and is used to write data to be written into the phase change memory unit 10;

[0039] The reading unit 30 is connected to the phase change storage unit 10, the read reference unit 40, and the bias unit 50, and is used to read data stored in the phase change storage unit 10;

[0040] The reading reference unit 40 is connected to the reading unit 30 and the bias unit 50, and is used to provide a comparison object when the reading unit 30 reads data;

[0041] The bias unit 50 is connected to the read unit 30 and the read reference unit 40, and is used to provide a clamping voltage to th...

Example Embodiment

[0056] Example 2

[0057] Such as figure 2 As shown, this embodiment provides a 4x4 one-time programmable memory. The 4x4 one-time programmable memory includes at least: 4 phase change storage units 10, 4 write units 20, and 4 reads. Unit 30, 1 read reference unit 40 and 1 bias unit 50, of which:

[0058] 4 phase change memory cells 10 for storing data to be written;

[0059] 4 writing units 20, respectively connected to the 4 phase change memory cells 10, for writing data to be written into each phase change memory cell 10;

[0060] The four reading units 30 are respectively connected to the four phase change storage units 10, the read reference unit 40 and the bias unit 50, and are used to read the data stored in each phase change storage unit 10;

[0061] The reading reference unit 40 is connected to each of the reading unit 30 and the bias unit 50, and is used to provide a comparison object for each of the reading units 30 when reading data;

[0062] The bias unit 50 is connected t...

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PUM

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Abstract

The invention provides a disposable programmable memory as well as a programming method and a reading method of the memory. The disposable programmable memory at least comprises a phase-change storage unit for storing data to be written, a writing unit for writing the data to be written into the phase-change storage unit, a reading unit for reading data stored in the phase-change storage unit, a read reference unit for providing a comparing object when the data are read by the reading unit, an offset unit for providing clamp voltage for the phase-change storage unit when the reading unit reads. The disposable programmable memory has the beneficial effects that the disposable non-reversible operation to the phase-change storage unit is achieved through a simple periphery circuit, so that the disposable programmable property is achieved, the area occupied by the memory is reduced to the maximum extent, and the application cost is lowered.

Description

technical field [0001] The invention relates to the technical field of design and manufacture of a non-volatile memory, in particular to a one-time programmable memory composed of a phase-change memory unit and a programming method and a reading method thereof. Background technique [0002] One-time programmable memory (OTP) is a non-volatile memory device that retains information even when power is removed. One-time programmable memory can provide flexible and low-cost solutions for circuits, so it has been widely used in various circuits. At present, there are various structures and methods to realize the OTP function, among which the OTP memory adopting the transistor structure and changing the threshold voltage of the transistor by means of voltage coupling is the mainstream OTP memory. Due to the technical node scaling problem of OTP memory based on floating gate structure to store charges, such as NAND flash memory and NOR flash memory, the limited life cycle will bec...

Claims

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Application Information

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IPC IPC(8): G11C17/16G11C17/18
Inventor 陈后鹏李喜宋志棠
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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