Semiconductor Memory Device Rectifying Conductive Paths
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Resistance varying memory devices face challenges in increasing memory capacity per unit area due to complex electrode connections and the difficulty of adding more electrodes, which complicates the storage of multiple bits in a single memory cell.
Innovation Solution
A semiconductor memory device with a dielectric film that forms rectifying conductive paths between arbitrarily selected electrodes, allowing for the storage of multiple bits by controlling voltage applications, thereby increasing memory capacity without the need for additional electrode connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If three or more electrodes are connected to a memory cell to store multiple bits, then memory capacity per cell increases, but electrode connection complexity increases and manufacturing becomes more difficult
Solution Approach 1:
The patent transitions from planar electrode connections to three-dimensional stacked electrode connections. Multiple electrodes are arranged vertically in different layers, allowing multiple conductive paths to be formed through the dielectric film without increasing lateral connection complexity. This vertical stacking enables storing multiple bits in a single memory cell while maintaining manageable electrode connection complexity through standardized vertical interfaces.
2Quantity of substance
If the number of electrodes is increased to store more bits, then memory capacity increases, but memory cell area increases making it difficult to increase memory capacity per unit area
Solution Approach 1:
The patent utilizes vertical stacking of electrodes in different layers to increase memory capacity without expanding the lateral footprint of memory cells. By forming conductive paths through the dielectric film between electrodes in different vertical layers, the invention achieves higher storage density within the same planar area, effectively moving from two-dimensional to three-dimensional memory architecture.
3Quantity of substance
If multiple conductive paths are formed between electrodes to increase storage capacity, then information storage capability increases, but the complexity of controlling and managing electrode connections increases
Solution Approach 1:
The patent creates a universal memory cell structure where the dielectric film and electrode arrangement can form multiple conductive paths through a standardized configuration. Each conductive path follows the same formation mechanism and control methodology, allowing multiple bits to be stored and manipulated using consistent operational procedures rather than requiring unique control schemes for each path.
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 the storage of more information per unit area by forming rectifying conductive paths between electrodes, increasing memory capacity proportionally with the number of electrodes, while simplifying the manufacturing process and reducing the complexity of electrode connections.
Implementation Method 1
The conductive path has a rectifying property of allowing a current to flow more easily in a first direction connecting arbitrary two electrodes than in a second direction opposite to the first direction
Data Source
AI summary
A semiconductor memory device according to one embodiment of the present invention includes a dielectric film configured to store information depending on presence or absence of a conductive path therein, and a plurality of electrodes provided to contact a first surface of the dielectric film. The conductive path can be formed between two electrodes arbitrarily selected form the plurality of electrodes. The conductive path has a rectifying property of allowing a current to flow more easily in a first direction connecting arbitrary two electrodes than in a second direction opposite to the first direction. The largest possible number of the conductive paths that may be formed is larger than the number of the plurality of electrodes.