| Since the birth of human civilization,information storage technology has been continuously developing,and phase change memory(PCM)is one of the main candidates for the next generation of non-volatile storage technology.It takes advantage of the unique phase change characteristics of phase change materials with semiconductors.The combination of chip technology may shift the paradigm of existing computer architecture,and the selection and improvement of phase change memory materials is the bottleneck to achieve this goal.The traditional "trial and error" method has greatly increased the development cost and development cycle of phase change storage.As a new type of material research and development mode,material genome engineering(MGE)collects a large number of data on the relationship between material properties(performance)and material structure(or formula,process),and based on this,materials and process formulas are screened to obtain new materials with specific properties to meet.The needs of practical applications,in which the collection of reliable materials data and systematic analysis is the basis for the development of MGE.This project aims to design and build a genetic database of phase change memory materials,which can add,search and filter data.Once we establish this database,specific parameter and characteristics can be retrived and analyzed.We list the relavant data,and analyze the structure-property relation of these material.The main research contents are described as follows:(1)This project relies on VUE as the main development language,and the web application development framework is based on Django.At the same time,it combines HTML,CSS,Java Script and other web development technologies and materials science technologies and algorithms to build a convenient phase change material data visualization platform.(2)The thermal stability of the amorphous phase is a key feature of the phase change memory,which limits the data retention time and the reliability of the device.Therefore,the research on the thermal stability of phase change materials is very important.By analyzing some material data in the database and comparing the crystallization temperature between different materials,we found that material doping has a positive effect on improving the thermal stability of phase change materials.(3)The increasingly in-depth research on chalcogenide phase change materials has shown that the structure of amorphous phase change materials is relaxing or aging,which will lead to the problem of resistance drift.This hinders the further optimization of the device and affects its applications for ultra-high storage density.Part of the data was selected from the database,and the resistance drift coefficients were compared and analysized.We found that several materials doping strategies haves the characteristics of low resistance drift. |
