Standard Cell Jog Pattern Routing for High Density ICs
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Solution Overview
Problem
The increasing density of lines in semiconductor devices due to decreasing gate lengths and pitches complicates the formation of efficient routing for interconnecting standard cells in integrated circuits, affecting the operation characteristics and density of active regions.
Innovation Solution
The design of integrated circuits with standard cells featuring a large active region width and jog patterns on metal tracks, along with connection patterns off the tracks, facilitates easier routing and improved performance by allowing for wider active regions and symmetrical patterns that enhance electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the gate length and pitch are continuously decreased to increase device density, then the integration density increases, but the line density for connecting semiconductor devices increases making routing more complex
Solution Approach 1:
The patent introduces jog patterns that extend metal lines in multiple directions (adding dimensional complexity) to provide additional routing paths. Connection patterns are formed both on-track (continuing the main line direction) and off-track (deviating to alternative paths), creating a multi-dimensional routing network that bypasses the limitations of simple linear routing in high-density layouts.
Solution Approach 2:
The routing structure is divided into multiple segments: track portions for main signal flow, jog patterns for directional changes, and connection patterns for local interconnections. This segmentation allows each component to be optimized independently - tracks maintain signal integrity, jogs provide routing flexibility, and connections enable local wiring - collectively solving the routing complexity problem.
2Reliability
If the active region width is increased to improve transistor current characteristics, then the electrical performance improves, but the standard cell area increases
Solution Approach 1:
The patent utilizes off-track connection patterns that extend in the vertical direction (second horizontal direction in the patent's coordinate system) to provide additional interconnection space. This vertical dimension expansion allows the active region to maintain optimal width for current characteristics while routing connections are established through alternative spatial paths, effectively decoupling the relationship between active region width and cell area.
Data Source
AI summary
Provided are an integrated circuit including a first standard cell including a first metal layer including a plurality of tracks respectively extending in a first horizontal direction and spaced apart from each other in a second horizontal direction, a jog pattern that includes a conductive pattern formed on a track selected from the plurality of tracks, and a connection pattern formed off the plurality of tracks, a plurality of gate lines respectively extending in the second horizontal direction, and a gate contact configured to connect a gate line selected from the plurality of gate lines to the first metal layer to connect the connection pattern to the selected gate line, and a method for fabricating the same.