Shift Register Memory Device Using Rotating Force Application
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Solution Overview
Problem
Conventional shift register memory devices face challenges in achieving high integration density and accurate data shifting, particularly in synchronously moving 100 or more data positions due to limitations in the synchronization of data movement across storage elements.
Innovation Solution
A shift register memory device comprising a plurality of rotors with uniaxial anisotropy, organized into pairs, where a rotating force is applied to urge the characteristic direction of each rotor to rotate, allowing data to be programmed and read by aligning magnetization directions, enabling efficient data shifting through the application of magnetic fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If only storage elements are disposed with high density in shift register memory devices, then storage capacity per unit surface area is improved, but synchronous data shifting accuracy deteriorates
Solution Approach 1:
The shift register memory device is divided into multiple independent shift register units, each capable of autonomous synchronous shifting. This segmentation allows high-density storage elements to be distributed across multiple units while maintaining synchronization through independent operation of each unit, thereby resolving the contradiction between high storage density and synchronous shifting accuracy.
Solution Approach 2:
The patent transitions from a single-column shift register architecture to a multi-column array architecture where storage elements are arranged in multiple parallel columns. Each column operates as an independent shift register unit, enabling high-density storage while maintaining synchronous data shifting through parallel operation across columns, thus resolving the technical contradiction.
2Quantity of substance
If conventional downscaling is applied to all memory cell components, then integration density is improved, but manufacturing complexity increases
Solution Approach 1:
The patent extracts the program/read unit functionality from each individual memory cell and consolidates it into shared program/read circuits. This allows the storage elements to be densely packed and scaled down while the program/read functionality is maintained through shared resources, thereby achieving high integration density without proportionally increasing manufacturing complexity.
Solution Approach 2:
The patent implements shared program/read circuits that serve multiple storage element columns simultaneously. This multi-functional approach allows a single set of program/read circuits to handle data operations for numerous storage elements, enabling high integration density while avoiding the manufacturing complexity that would arise from duplicating program/read units in each cell.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables high-density storage with reliable data shifting, increasing storage capacity per unit surface area and reducing costs, while maintaining stability even with increased physical length, thus overcoming the limitations of conventional systems.
Implementation Method 1
a rotating force application unit configured to apply a rotating force to the shift register to urge the characteristic direction to rotate
Implementation Method 2
Each of the plurality of rotors has a characteristic direction rotatable around a rotational axis extending in the one direction and provided with a uniaxial anisotropy
Implementation Method 3
configured to read the data by detecting the characteristic direction
Implementation Method 4
A first force acts to urge the characteristic directions to be opposingly parallel for two of the rotors belonging to the same pair
Data Source
AI summary
According to one embodiment, a shift register memory device includes a shift register, a program/read element, and a rotating force application unit. The shift register includes a plurality of rotors arranged along one direction and provided with a uniaxial anisotropy. Each of the plurality of rotors has a characteristic direction rotatable around a rotational axis extending in the one direction. The program/read element is configured to program data to the shift register by causing the characteristic direction of one of the rotors to match one selected from two directions conforming to the uniaxial anisotropy and configured to read the data by detecting the characteristic direction. The rotating force application unit is configured to apply a rotating force to the shift register to urge the characteristic direction to rotate. The plurality of rotors are organized into a plurality of pairs of every two mutually adjacent rotors. A first force acts to urge the characteristic directions to be opposingly parallel for two of the rotors belonging to the same pair. A second force acts to urge the characteristic directions to be opposingly parallel for two mutually adjacent rotors belonging to mutually adjacent pairs.