Data Channel Aging Circuit for IC Reliability
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Solution Overview
Problem
Existing IC aging tests are limited in detecting defects across all data channels, leading to poor reliability and stability due to the inability to simultaneously test all channels efficiently.
Innovation Solution
A data channel aging circuit comprising a memory cell, control unit, and strobe unit that generates and applies a voltage control signal to switch and adjust the voltage state of each data channel, inducing voltage stress aging across all or most data channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data compression mode is used to increase the number of ICs that can simultaneously undergo aging testing, then test efficiency is improved, but the reliability of the aging test deteriorates because not all data channels can be tested
Solution Approach 1:
The patent divides the data channels into two groups: first data channels connected to the aging machine for data transmission, and second data channels connected to the voltage control circuit for voltage stress application. This segmentation allows simultaneous testing of all channels while maintaining test efficiency, resolving the contradiction between productivity and reliability.
Solution Approach 2:
The patent implements a dual-mode testing approach where the same IC undergoes both data transmission testing (through first data channels) and voltage stress testing (through second data channels) simultaneously. This multi-functionality ensures comprehensive defect detection across all channels, improving aging test reliability without sacrificing test efficiency.
2Reliability
If all data channels are tested simultaneously, then aging test reliability is improved, but test efficiency deteriorates due to limited test channel availability
Solution Approach 1:
The patent introduces a voltage control circuit as an intermediary component that applies voltage stress to the second data channels independently of the aging machine's data transmission capability. This intermediary enables comprehensive testing of all channels simultaneously without being constrained by the limited test channel capacity of the aging machine, thus maintaining both reliability and efficiency.
3Measurement precision
If voltage stress aging is applied to all data channels, then defect detection capability is improved, but device complexity increases due to additional control circuits
Solution Approach 1:
The patent applies voltage stress selectively to the second data channels through dedicated control circuits, while the first data channels continue to receive data transmission testing. This localized application of voltage stress ensures comprehensive defect detection in channels that would otherwise be inaccessible, improving measurement precision without requiring complex control of all channels simultaneously.
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
This approach enhances the reliability and stability of IC products by performing aging tests on all data channels, improving the detection of defects and operational stability.
Implementation Method 1
adjust a voltage level of each of the plurality of data channels through the voltage control signal to induce voltage stress aging
Data Source
AI summary
A data channel aging circuit, a memory, a data channel aging method, and a memory aging method are provided. The data channel aging circuit includes: a memory cell storing a voltage switching signal configured to provide a target voltage state for each of a plurality of data channels in an integrated circuit (IC); a control unit configured to generate a voltage control signal and to send the voltage control signal to each data channel; and a strobe unit configured to switch a conductive state of each data channel based on the voltage switching signal, and to adjust a voltage level of each data channel through the voltage control signal to induce voltage stress aging. The data channel aging circuit improves the reliability of the aging test and the operational stability of the IC products that have went through the aging test.