公开(公告)号：US20230287253A1

公开(公告)日：2023-09-14

申请号：US17928932

申请日：2021-12-22

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Xiaomin CHENG ,  Yuntao ZENG ,  Xiangshui MIAO

IPC: C09K5/06 ,  C23C14/35 ,  C23C14/06 ,  H10B63/10 ,  H10N70/00

CPC classification number: C09K5/063 ,  C23C14/352 ,  C23C14/0623 ,  H10B63/10 ,  H10N70/8828

Abstract: A Cu-doped Sb2Te3 system phase change material, a phase change memory, and a preparation method thereof belonging to the technical field of micro-nano electronics are provided. A Sb—Te system phase change material is doped with Cu element to form Cu3Te2 bonds with both tetrahedral and octahedral structures in the case of local enrichment of Cu. The strongly bonded tetrahedral structure improves the amorphous stability and data retention capability of the Sb—Te system phase change material, and the octahedral structure of the crystal configuration improves the crystallization speed of the Sb—Te system phase change material. A phase change memory including the phase change material and a preparation method of the phase change material are also provided. Through the phase change material provided by the invention, both the speed and amorphous stability of the device are improved, and the comprehensive performance of the phase change memory is also enhanced.

公开(公告)号：US20230099931A1

公开(公告)日：2023-03-30

申请号：US17642706

申请日：2021-01-05

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Xiaomin CHENG ,  Han LI ,  Yuntao ZENG ,  Yunlai ZHU ,  Xiangjun LIU ,  Xiangshui MIAO

IPC: H01L47/00

Abstract: A phase change memory device based on a nano current channel is provided. A nano current channel layer structure is adopted and configured to limit the current channel. As such, when flowing through the layer, the current enters the phase change layer from nano crystal grains with high electrical conductivity, and the current is thereby confined in the nano current channels. By using the nano-scale conductive channels, the contact area between the phase change layer and the electrode layer is significantly decreased, the current density at local contact channel is significantly increased, and heat generation efficiency of the current in the phase change layer is improved. Moreover, an electrically insulating and heat-insulating material with low electrical conductivity and low thermal conductivity prevents heat in the phase change layer from being dissipated to the electrode layer, and Joule heat utilization efficiency of the phase change layer is thereby improved.