Anti-Fuse Array Layout for Uniform Read Current
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Solution Overview
Problem
Existing anti-fuse bit structures in integrated circuits (ICs) face challenges in achieving uniform and efficient programming and read operations due to varying gate structure lengths, leading to increased parasitic path resistance and variability in read current values.
Innovation Solution
The configuration of anti-fuse cell and array structures with gate structure segments shorter than the distance between adjacent active areas, ensuring uniform low resistance and reduced parasitic path resistance by positioning conductive regions between active areas, thereby improving programming and read operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gate structure segments are made longer to connect anti-fuse structures to conductive regions, then electrical connection is achieved, but parasitic path resistance increases and read current variability worsens
Solution Approach 1:
The gate structure is divided into multiple segments of uniform length, where each segment connects an anti-fuse structure to a conductive region. This segmentation ensures that each gate structure portion has consistent dimensions, reducing variability in parasitic resistance across different anti-fuse bits while maintaining reliable electrical connections.
Solution Approach 2:
The patent applies uniform gate structure segment lengths specifically at critical connection points between anti-fuse structures and conductive regions. This local optimization ensures low and consistent parasitic resistance where it most impacts performance, while allowing other parts of the circuit to have different characteristics.
2Manufacturing precision
If gate structure segments are made shorter to reduce parasitic resistance, then read current uniformity improves, but electrical connection reliability may be compromised
Solution Approach 1:
The gate structure is divided into multiple segments of uniform length, where each segment connects an anti-fuse structure to a conductive region. This segmentation ensures that each gate structure portion has consistent dimensions, reducing variability in parasitic resistance across different anti-fuse bits while maintaining reliable electrical connections.
Solution Approach 2:
The patent optimizes the length parameter of gate structure segments to a specific value that is shorter than the distance between adjacent active areas. This parameter change reduces parasitic resistance and improves read current uniformity while maintaining sufficient electrical connection reliability through proper design of the segment length.
3Adaptability or versatility
If gate structure segments vary in length, then layout flexibility is improved, but parasitic path resistance variability increases
Solution Approach 1:
The gate structure is divided into multiple segments of uniform length, where each segment connects an anti-fuse structure to a conductive region. This segmentation ensures that each gate structure portion has consistent dimensions, reducing variability in parasitic resistance across different anti-fuse bits while maintaining reliable electrical connections.
Solution Approach 2:
The patent applies uniform gate structure segment lengths specifically at critical connection points between anti-fuse structures and conductive regions. This local optimization ensures low and consistent parasitic resistance where it most impacts performance, while allowing other parts of the circuit to have different characteristics.
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
This configuration enhances the reliability and uniformity of programming and read operations by reducing overall parasitic path resistance and variability in read current values, leading to more consistent and efficient data storage in ICs.
Implementation Method 1
a programming electric field is applied across the dielectric material layer to sustainably alter (e.g., break down) the dielectric material, thus decreasing the resistance of the dielectric material layer
Data Source
AI summary
An anti-fuse array includes first through fourth adjacent anti-fuse bit columns, the anti-fuse bits of the first and second anti-fuse bit columns including portions of active areas of a first active area column, and the anti-fuse bits of the third and fourth anti-fuse bit columns including portions of active areas of a second active area column. Each row of a first set of conductive segment rows includes first and second conductive segments positioned between adjacent active areas of the first active area column and a third conductive segment positioned between adjacent active areas of the second active area column. Each row of a second set of conductive segments alternating with the first set of conductive segment rows includes a fourth conductive segment positioned between adjacent active areas of the first active area column and fifth and sixth conductive segments positioned between adjacent active areas of the second active area column.