Magnetoresistive Memory Aging Test with Magnetic Field Stress
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current reliability testing for magnetoresistive memories is time-consuming and inefficient, as it relies solely on temperature and voltage application to accelerate the write/erase cycle, necessitating a more effective method to evaluate memory aging.
Innovation Solution
A reliability evaluation apparatus that simultaneously applies voltage and magnetic fields to magnetoresistive memories within a controlled environment, utilizing a housing with sockets, electromagnets, and a controller to manage temperature and magnetic field orientation, allowing for accelerated aging tests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If temperature and voltage application is performed to accelerate the write/erase cycle, then the evaluation time is shortened, but the aging rate is not sufficiently accelerated
Solution Approach 1:
The patent applies multiple stress parameters simultaneously (temperature, voltage, and magnetic field) to accelerate the aging process. The magnetic field is applied in addition to the conventional temperature and voltage stress, creating a multi-parameter stress environment that significantly accelerates the write/erase cycle and aging rate of magnetoresistive memories.
Solution Approach 2:
The patent uses a composite stress approach by combining thermal stress (temperature), electrical stress (voltage), and magnetic stress (magnetic field) to create a synergistic effect. This composite stress method accelerates aging more effectively than any single stress parameter alone, resolving the contradiction between evaluation time and aging rate acceleration.
2Productivity
If multiple stress parameters are applied simultaneously, then the aging rate is significantly accelerated, but the device complexity increases
Solution Approach 1:
The patent divides the stress application system into separate independent modules: a temperature control system, a voltage application system, and a magnetic field application system. Each module can be controlled independently by separate controllers, allowing for simplified design and control of each individual stress parameter while achieving combined acceleration effects.
Solution Approach 2:
The housing structure serves multiple functions simultaneously: it contains the magnetoresistive memories, provides thermal insulation and temperature control, applies magnetic fields through electromagnets, and facilitates voltage application. This multi-functional design reduces overall system complexity by integrating multiple stress application functions into a single unified apparatus.
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 significantly shortens the evaluation time for magnetoresistive memories by accelerating the aging process, enabling more efficient and cost-effective reliability testing.
Implementation Method 1
A heater is provided inside the housing
Implementation Method 2
A plurality of electromagnets are arranged inside the housing
Data Source
AI summary
A reliability evaluation apparatus according to the present embodiment is provided with a housing and a board insertable into the housing. A plurality of sockets are provided on the board. Semiconductor devices are respectively attachable to socket. The plurality of sockets have electrodes electrically connectable to terminals of the semiconductor devices. A heater is provided inside the housing. A controller is connected to the plurality of sockets and to the heater. The controller controls a voltage to be applied to the terminal of the semiconductor device and controls an output of the heater. A plurality of electromagnets are arranged inside the housing so as to be positioned above or below the plurality of sockets when the board is inserted into the housing.