CMOS Analog Component Context Variation Reduction

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

As integrated circuit (IC) sizes decrease and device density increases, context variations become problematic, leading to degraded analog components that may not function as expected due to high strain levels in IC technologies, with conventional solutions failing to reduce these variations effectively.

Innovation Solution

The method involves identifying components with context variations in IC designs using a cover layer and applying context-variation-reduction design rule restrictions to minimize these variations, which can be enforced through a design kit that includes a drawing layer and design rule checker code, allowing for improved predictability and manufacturability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If IC device size is reduced and device density is increased, then integration capability is improved, but context variations increase causing analog component degradation

Engineering Contradiction:

Improveintegration capabilityVSAvoidanalog component functionality

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies local quality by identifying specific analog components that are sensitive to context variations and applying specialized design rule restrictions only to those components rather than the entire IC design. The cover layer selectively marks analog components requiring enhanced design rule enforcement, allowing different design approaches for different regions of the circuit.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements preliminary action by performing context variation analysis and applying design rule restrictions during the design phase before manufacturing. The cover layer is generated and design rule restrictions are applied in advance to prevent context variations from degrading analog components, rather than attempting to correct variations after they occur during fabrication.

Inventive Principle:

Principle #10Preliminary action

2Speed

If high levels of strain are introduced to IC technologies to boost performance, then device performance is improved, but context variations and parameter shifts increase

Engineering Contradiction:

Improvedevice performanceVSAvoidparameter stability

Core Design Contradiction:

SpeedVSManufacturing precision

Solution Approach 1:

The patent applies parameter changes by modifying design rule parameters specifically for analog components marked by the cover layer. Design rule restrictions such as minimum spacing requirements, width constraints, and layout configurations are adjusted to compensate for strain-induced parameter shifts, ensuring stable analog component performance under high-performance operating conditions.

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If conventional design rules are applied to all components, then design simplicity is maintained, but context variations cannot be reduced for sensitive analog components

Engineering Contradiction:

Improvedesign rule enforcementVSAvoidanalog component matching

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent applies segmentation by dividing the IC design into two categories: analog components marked by the cover layer requiring enhanced design rule enforcement, and digital components using conventional design rules. This segmentation allows tailored design rule restrictions to be applied only where necessary, balancing design complexity with reliability requirements.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS8438526B2Method for minimizing transistor and analog component variation in CMOS processes through design rule restrictions

Publication Date: 2013.05.07 TEXAS INSTRUMENTS INC

AI summary

Various embodiments provide an integrated circuit (IC) design method and design kit for reducing context variations through design rule restrictions. The design method can be applied to components (e.g., analog blocks) with a context variation in an IC design. By drawing a cover layer over such components, context-variation-reduction design rule restrictions can be applied to reduce the context variations.