IC Routing Wire Width and Shape Adjustment for Resistance Uniformity

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Solution Overview

Problem

Existing integrated circuit (IC) designs face challenges in mitigating resistance differences between routing wires, leading to performance issues such as display artifacts and increased design and manufacturing costs due to time-consuming and computationally complex processes.

Innovation Solution

A method and system that adjust the width and shape of routing wires based on pin pairs to reduce resistance differences, using iterative adjustments to achieve target resistance values, thereby generating a more efficient and cost-effective IC design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the width of routing wires is increased to decrease resistance, then the resistance difference between wires is reduced, but the area occupied by the wires increases

Engineering Contradiction:

Improveresistance uniformityVSAvoidrouting wire area

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The patent applies local quality by assigning different widths to different routing wires based on their specific resistance requirements. Instead of using a uniform width for all wires, the system calculates and implements localized width adjustments for individual wires or wire segments to achieve target resistance values, thereby reducing resistance differences without unnecessarily increasing the total area occupied by all routing wires.

Inventive Principle:

Principle #3Local quality

2Reliability

If iterative adjustments are made to achieve target resistance values, then resistance differences are reduced, but the design time and computational complexity increase

Engineering Contradiction:

Improveresistance uniformityVSAvoiddesign time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-calculating target resistance values for all routing wires before the detailed routing design phase. The system determines these target values based on wire length, location, and electrical characteristics, allowing the routing algorithm to directly implement optimal widths without requiring multiple iterative adjustments during the design process, thereby reducing design time and computational complexity.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If the width of routing wires is adjusted to decrease resistance, then the signal quality improves, but the manufacturing complexity increases

Engineering Contradiction:

Improvesignal qualityVSAvoidrouting wire manufacturing

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent applies parameter changes by systematically varying the width parameter of routing wires to achieve target resistance values and maintain signal quality. The system establishes width parameters within specific manufacturing constraints and uses these controlled parameter variations to balance signal integrity with manufacturability, avoiding extreme or impractical width adjustments that would complicate the manufacturing process.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250209250A1Integrated circuit device having routing wires with different width and shape features

Publication Date: 2025.06.26 SYNOPSYS INC

AI summary

Wiring routing for an integrated circuit may be generated by receiving a circuit design of the integrated circuit device, and determining a first routing comprising wires based on pin pairs of first pins and second pins of the circuit design. An updated routing is determined by increasing a width of a first wire of the wires to decrease a resistance of the first wire. An output routing is determined from the updated routing by adjusting a shape of the routing.