On-Die Capacitor RC Extraction for Power Distribution Networks

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Solution Overview

Problem

The increasing complexity and scale of power supply circuits in memory devices make it challenging to design and simulate power-receiving circuits efficiently, leading to significant computation resource requirements and prolonged simulation times.

Innovation Solution

The method involves performing a first and second RC extraction process on power-receiving circuits and power distribution networks to produce RC models, which are then used for simulation. Simplified first-order RC models are constructed for the inner circuit and power distribution network to reduce simulation complexity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If full RC extraction is performed on all power distribution network elements, then simulation accuracy is improved, but computation time and resource usage increase significantly

Engineering Contradiction:

Improvesimulation accuracyVSAvoidcomputation time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The power distribution network is divided into two segments: (1) power-receiving circuit elements that undergo full RC extraction to capture detailed capacitive effects, and (2) power distribution network elements that use simplified RC extraction. This segmentation allows accurate modeling where needed while reducing overall computational burden.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different extraction methods are applied to different regions of the circuit based on their specific requirements. The power-receiving circuit, which has complex capacitive structures, receives full RC extraction treatment. The power distribution network, which has more uniform characteristics, receives simplified treatment. This local differentiation optimizes the balance between accuracy and efficiency.

Inventive Principle:

Principle #3Local quality

2Reliability

If detailed RC extraction is performed on power-receiving circuits with complex capacitive structures, then power supply integrity analysis is improved, but device complexity and computation resources increase

Engineering Contradiction:

Improvepower supply integrityVSAvoidextraction process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The extraction process uses different parameter extraction strategies for different circuit regions. For power-receiving circuits, full parasitic parameters are extracted to capture complex capacitive effects. For power distribution networks, simplified parameters are extracted. This parameter differentiation maintains reliability where needed while reducing overall complexity.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12321676B2System and methods for modeling and simulating on-die capacitors

Publication Date: 2025.06.03 YANGTZE MEMORY TECH CO LTD

AI summary

The present disclosure is directed to methods and systems for analyzing integrated circuits. The method includes performing a first resistor capacitor (RC) extraction process on a power-receiving circuit and producing a first RC model. The method also includes scanning a netlist of a power distribution network, the power distribution network electrically connected to the power-receiving circuit. The method further includes determining a selection of circuit elements of the power distribution network based on a predetermined criteria. The method further includes performing a second RC extraction process on the selection of circuit elements and producing a second RC model. The method further includes performing a simulation process on the power-receiving circuit and the power distribution network using the first and second RC models.