Automated Test Platform for Oxide Breakdown Detection

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Solution Overview

Problem

The automotive industry faces stringent quality standards for integrated circuits due to safety-critical applications, requiring rigorous testing of oxide layers to prevent breakdown under extreme conditions, which existing automated testing systems struggle to address effectively.

Innovation Solution

An automated test platform that applies a temporally-defined voltage signal with varying amplitudes and durations to devices under test, monitors current flow, and determines if it exceeds predefined thresholds, using a processing system, test head, interconnection platform, and switching system to disconnect the voltage if thresholds are exceeded, thereby preventing oxide layer breakdown and component failure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If extreme voltages (e.g., ±100V) are applied to test oxide layers, then the ability to detect oxide breakdown improves, but the risk of damaging the device under test increases

Engineering Contradiction:

Improveoxide breakdown detection accuracyVSAvoiddevice damage risk

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary testing at lower voltage levels before progressively increasing to extreme voltages. This staged approach allows detection of oxide breakdown while minimizing the risk of damaging the device under test, as the device is gradually acclimated to higher stress levels

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The testing system applies voltages periodically in controlled cycles rather than continuously, allowing the device to be tested at extreme voltages temporarily for detection purposes while providing recovery periods that reduce cumulative damage risk

Inventive Principle:

Principle #19Periodic action

2Measurement precision

If continuous monitoring of current flow is implemented, then the detection of oxide breakdown improves, but the system complexity increases

Engineering Contradiction:

Improveoxide breakdown detection accuracyVSAvoidtesting system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The system uses current flow as an intermediary indicator to detect oxide breakdown indirectly. Instead of directly measuring oxide integrity, the system monitors the current that flows through the oxide layer, which changes when breakdown occurs, simplifying the detection mechanism

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system implements feedback loops where current measurements are continuously fed back to the control system, which automatically adjusts testing parameters or alerts operators to oxide breakdown conditions, reducing the need for complex manual monitoring

Inventive Principle:

Principle #23Feedback

3Productivity

If rapid voltage changes are applied to test devices, then the testing speed improves, but the mechanical stress on components increases

Engineering Contradiction:

Improvetesting speedVSAvoidmechanical stress on components

Core Design Contradiction:

ProductivityVSStress or pressure

Solution Approach 1:

The system dynamically adjusts voltage application rates based on device responses and test conditions. Rather than using fixed rapid voltage changes, the system modulates the rate of voltage application to balance testing speed with mechanical stress constraints, adapting to real-time feedback from the device under test

Inventive Principle:

Principle #15Dynamics

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Ensures high-quality integrated circuits by accurately detecting and preventing oxide layer breakdown and component failure, ensuring compliance with stringent automotive industry standards while minimizing damage to devices under test.

Implementation Method 1

provide a voltage signal having a plurality of voltages to the at least one device under test, monitor a current flow into the at least one device under test during each of the plurality of voltages

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS10444278B2Testing system and method

Publication Date: 2019.10.15 XCERRA CORP

AI summary

A method, computer program product, computing system, and an automated test platform for testing at least one device under test includes a test head configured to receive the at least one device under test. A processing system is configured to: provide a voltage signal having a plurality of voltages to the at least one device under test, monitor a current flow into the at least one device under test during each of the plurality of voltages, thus generating a plurality of monitored current values that correspond to the plurality of voltages, and determine if one or more of the plurality of monitored current values exceeds one or more of a plurality of current thresholds.