IC Active Region Layout Across Cell Boundaries for Higher Drive Current
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Solution Overview
Problem
The miniaturization of integrated circuits (ICs) has led to stricter design and manufacturing specifications, as well as reliability challenges, due to increased complexity and the need for precise alignment of various components.
Innovation Solution
The proposed solution involves a specific layout design for integrated circuits that includes a set of active regions, contacts, gates, power rails, and vias, where the active regions extend continuously through cell boundaries, increasing compressive strain and driving current capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the active regions are confined within cell boundaries, then the manufacturing alignment is easier, but the driving current capability is reduced
Solution Approach 1:
The patent divides the integrated circuit into multiple cells with defined cell boundaries, while allowing active regions to extend continuously across these boundaries. This segmentation approach enables independent manufacturing alignment for each cell while maintaining continuous active regions for enhanced current capability. The cell boundaries serve as reference markers for alignment without constraining the underlying active region continuity.
2Area of moving object
If the integrated circuit is miniaturized, then the device size is reduced and power consumption is lowered, but the design and manufacturing specifications become stricter
Solution Approach 1:
The cell boundary structure serves multiple functions simultaneously: it provides alignment references for manufacturing, defines logical cell divisions for design purposes, and maintains continuous active regions for electrical functionality. This multi-functionality allows miniaturization without proportionally increasing manufacturing complexity, as the same structural elements serve multiple purposes.
3Reliability
If the active regions extend continuously through cell boundaries, then the compressive strain and driving current capability are increased, but the layout complexity increases
Solution Approach 1:
By segmenting the IC into standardized cells with clear boundary definitions, the patent manages layout complexity through modular design. The cell boundaries provide structured reference points that simplify the organization of continuous active regions, making the overall layout more manageable despite the extended continuity requirement.
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 design enhances the driving current capability and performance of integrated circuits by increasing compressive strain, while also potentially reducing the physical size and improving manufacturing yield compared to other approaches.
Implementation Method 1
the active regions extend continuously through cell boundaries, increasing compressive strain and driving current capability
Data Source
AI summary
An integrated circuit includes a set of active regions, a first set of contacts, a set of gates, a first set of power rails and a first set of vias. The set of active regions extends in a first direction. The first set of contacts overlaps the set of active regions, and a first and a second cell boundary of the integrated circuit that extends in a second direction. The set of gates extends in the second direction, overlaps the set of active regions, and is between the first and second cell boundary. The first set of power rails extends in the first direction, and overlaps at least the first set of contacts. The first set of vias electrically couples the first set of contacts and the first set of power rails together. The set of active regions extend continuously through the first cell boundary and the second cell boundary.