Oscillation Monitoring Circuit for Fast Semiconductor Defect Detection

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing semiconductor device manufacturing processes face challenges in accurately and efficiently detecting defects in semiconductor devices, particularly due to the time-consuming nature of current defect checking methods and the impracticality of checking multiple devices individually.

Innovation Solution

A monitoring circuit is integrated into the semiconductor device to accurately and quickly recognize defects by generating an oscillation signal with varying characteristics based on threshold voltage levels and counting the number of rises or falls of the signal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If existing defect checking methods are used, then defects can be detected, but the checking process takes a long time and accuracy is not high

Engineering Contradiction:

Improvedefect detection accuracyVSAvoidchecking time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The monitoring circuit performs preliminary defect detection during the semiconductor manufacturing process itself, before the devices are fully completed and shipped. By integrating the monitoring circuit into the manufacturing flow, defects are identified early when they can be more efficiently detected and addressed, eliminating the need for time-consuming post-manufacturing inspection processes

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The semiconductor device monitors its own manufacturing state through the integrated monitoring circuit, which automatically detects defects without requiring external inspection equipment or manual checking. The device performs self-diagnosis during production, enabling rapid defect identification and eliminating the need for separate quality control processes

Inventive Principle:

Principle #25Self-service

2Measurement precision

If individual semiconductor devices are checked one by one, then each device can be monitored, but it is not practical to check many devices efficiently

Engineering Contradiction:

Improveindividual device monitoring accuracyVSAvoidmanufacturing throughput

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The monitoring circuit is designed with universal applicability to monitor multiple semiconductor devices simultaneously using the same circuit architecture. The circuit can detect defects across many devices in parallel through standardized interfaces and measurement protocols, enabling high-volume production monitoring without requiring separate inspection systems for each device

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

Multiple monitoring functions are merged into a single integrated monitoring circuit that can handle various defect detection tasks simultaneously. The circuit combines multiple sensing capabilities and measurement functions in one unified system, allowing parallel monitoring of many devices without increasing system complexity or reducing productivity

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250067798A1Monitoring circuit and semiconductor device

Publication Date: 2025.02.27 SK HYNIX INC

AI summary

Embodiments of the present disclosure relate to a monitoring circuit and a semiconductor device, and particularly, to a monitoring circuit including an oscillation circuit configured to generate an oscillation signal having a rising characteristic or a falling characteristic according to a threshold voltage level and a counter configured to count the number of rises or the number of falls of the oscillation signal, and a semiconductor device including the monitoring circuit.