Memory Header Layout With Backside Power Rails for Selective Power Gating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current semiconductor fabrication techniques face challenges in efficiently managing power distribution within integrated circuits, particularly in reducing power consumption and maintaining performance as device sizes shrink, due to limitations in header circuitry design and backside power rail integration.
Innovation Solution
The implementation of header layout designs that include backside power rails (BPR) for semiconductor devices, utilizing both p-type and n-type transistors connected to respective BPRs, allowing for efficient voltage sourcing and reduced power consumption by enabling selective activation of memory cells and portions of the memory array.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional header circuitry design is used, then manufacturing is simpler, but power consumption increases and performance decreases
Solution Approach 1:
The patent introduces backside power rails (BPRs) that extend power distribution to the backside of the semiconductor die, adding a vertical dimension to power delivery. This allows header circuitry to access power from both frontside and backside, enabling more efficient power management and selective activation of memory cells without increasing lateral circuit complexity
Solution Approach 2:
The header circuitry is segmented into multiple sections, each associated with specific BPRs. This segmentation allows independent control and selective activation of different memory array portions, enabling precise power management where only active sections consume power, thereby reducing overall power consumption without requiring complete redesign of the entire header
2Area of moving object
If device size is reduced to shrink form factor, then integration density increases, but power distribution efficiency decreases
Solution Approach 1:
By extending power rails to the backside of the die, the patent creates a three-dimensional power distribution network. This vertical power delivery path reduces the lateral distance power must travel across the die, improving power distribution efficiency in compact devices without increasing the die area
Solution Approach 2:
The backside power rails act as intermediaries between the frontside header circuitry and the memory array. These BPRs provide localized power distribution points that reduce the distance and resistance for power delivery, maintaining efficiency even as device dimensions are reduced for smaller form factors
3Use of energy by moving object
If selective activation of memory cells is implemented, then power consumption is reduced, but header circuitry complexity increases
Solution Approach 1:
The header circuitry is divided into multiple sections, each connected to specific backside power rails. This segmentation enables independent control of different memory array regions, allowing selective activation of only the required portions. The segmented structure manages complexity by organizing control functions into modular units rather than requiring a monolithic complex design
Solution Approach 2:
The addition of backside power rails creates a vertical control dimension that simplifies selective activation. By providing power access from the backside, the patent enables straightforward enabling/disabling of specific memory regions through simple power rail activation, reducing the complexity of control logic that would otherwise be needed to achieve selective activation
Data Source
AI summary
Header circuitry for a memory device includes multiple backside power rails that form distinct voltage sources for a plurality of switching devices in the header circuitry. The header circuitry includes at least one region of a first conductivity type. A first section in the first region includes one backside power rail (BPR) that forms a first voltage source that provides a first voltage. A second section in the same first region includes another BPR that forms a second voltage source that provides a second voltage that is different from the first voltage.