Strap Cell Gate Layout for Lower RC Memory Circuits
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Solution Overview
Problem
Non-optimized layouts in integrated circuits (ICs) lead to unnecessary circuitry and increased die area, degrading circuit performance and speed due to unnecessary loads.
Innovation Solution
The layout structure includes bit cells, strap cells, and logic cells, with strap cells positioned between bit cells and logic cells, utilizing a specific arrangement of gates and connection structures to minimize layout area and reduce RC constant, thereby enhancing operational speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a non-optimized layout is used in integrated circuits, then the circuit may have simpler structure, but the die area increases and circuit speed degrades due to unnecessary circuitry and loads
Solution Approach 1:
The patent removes unnecessary circuitry and loads from the circuit layout, extracting only the essential functional elements needed for operation. This eliminates parasitic capacitances and resistances that degrade performance while maintaining the required circuit functionality.
Solution Approach 2:
The circuit layout is segmented into functional blocks with optimized interconnections. By dividing the circuit into discrete, efficiently connected segments, the patent reduces unnecessary signal paths and minimizes parasitic effects while maintaining structural simplicity.
2Device complexity
If a non-optimized layout is used in integrated circuits, then the circuit may have simpler structure, but the die area increases due to unnecessary circuitry
Solution Approach 1:
The patent merges adjacent circuit elements and shares common structures between multiple functions. By combining elements that can serve multiple purposes or are positioned close together, the design reduces the total die area while keeping the structural complexity manageable.
Solution Approach 2:
The patent utilizes three-dimensional packaging and vertical stacking of circuit layers to reduce the planar die area. By extending the circuit architecture into the vertical dimension, more functionality is packed into a smaller footprint without significantly increasing lateral complexity.
3Device complexity
If unnecessary loads are present in the circuit, then the circuit structure may be simpler, but the operational speed degrades
Solution Approach 1:
The patent extracts and removes unnecessary loads and parasitic elements from the circuit path. By eliminating these non-essential components, the circuit achieves faster switching speeds and reduced signal propagation delays without requiring complex compensation structures.
Data Source
AI summary
A method, includes: in a strap cell disposed between a memory cell and a logic cell, arranging a first gate across an active region; arranging a second gate next to and in parallel with the first gate and at an end of the active region; and when at least one conductive segment has a first length, arranging the at least one conductive segment across the first gate, the second gate, and no dummy gate in the strap cell. A semiconductor device is also disclosed herein.