Gate Line Pattern Shielding for Semiconductor Layout Optimization
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Solution Overview
Problem
The complexity of contemporary semiconductor devices requires sophisticated design and simulation tools to optimize integrated circuits, but existing methods struggle to fully realize performance capabilities due to the challenges of fine-patterning technologies and design rule constraints.
Innovation Solution
A method is introduced that generates a layout design by shielding and un-shielding gate line patterns to prevent modifications in initial layouts, allowing for optimization of transistor gate lengths and performance characteristics, enabling further optimization of semiconductor devices beyond conventional design rule limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If shield marks are applied to all gate line patterns to prevent modification, then manufacturing precision is maintained according to design rules, but adaptability is reduced as selective optimization becomes impossible
Solution Approach 1:
The patent applies local quality by differentiating the treatment of gate line patterns based on their circuit criticality. Critical circuit gate patterns retain shield marks to maintain design rule compliance, while non-critical circuit gate patterns have shield marks removed to enable optimization. This localized differentiation resolves the contradiction by applying precision control only where necessary while enabling adaptability where permissible.
Solution Approach 2:
The patent segments gate line patterns into distinct categories (critical vs. non-critical circuits) and applies different shield mark strategies to each segment. This segmentation allows the system to simultaneously maintain manufacturing precision for critical patterns while achieving adaptability for non-critical patterns, resolving the overall contradiction through divided management.
2Reliability
If design rules strictly control gate line pattern dimensions, then reliability is ensured, but device complexity increases as optimization options are limited
Solution Approach 1:
The patent applies local quality by implementing differentiated reliability control based on circuit criticality. Critical circuits maintain strict design rule compliance through retained shield marks, ensuring reliability where performance consistency is paramount. Non-critical circuits allow relaxed control with removed shield marks, reducing design complexity where performance margins exist. This localized approach resolves the contradiction between reliability and complexity.
3Use of energy by moving object
If all gate line patterns are optimized for performance, then power consumption decreases, but manufacturing precision may be compromised as design rule constraints are violated
Solution Approach 1:
The patent applies local quality by selectively removing shield marks from non-critical circuit gate patterns to enable performance optimization while retaining shield marks on critical circuit patterns to maintain manufacturing precision. This localized optimization allows power consumption reduction in non-critical areas without compromising the manufacturing precision required for critical circuits, resolving the contradiction between energy efficiency and pattern conformity.
Data Source
AI summary
A method of generating a photo mask for use during fabrication of a semiconductor device includes; generating an initial layout design including critical circuit paths and non-critical circuit paths by shielding all gate line patterns used to implement transistors in the critical circuits and non-critical circuits, and thereafter generating a layout design from the initial layout design by selectively un-shielding a non-critical gate line pattern among the gate line patterns used to implement a gate of a non-critical transistor in a non-critical circuit, while retaining the shielding of all critical gate line patterns among the gate line patterns.