Taiwan Semiconductor Manufacturing Comp. Ltd.

Chia-Wen Zhong

Yao-Wen Chang

Yen-Liang Lin

Tzu-Yu Lin

Cheng-Yuan Tsai

Ru-Liang Lee

Kuo-Liang Lu

Min-Chang Ching

Various embodiments of the present disclosure are directed towards an integrated chip. The integrated chip includes an interconnect structure overlying a semiconductor substrate and comprising a conductive wire. A passivation structure overlies the interconnect structure. An upper conductive structure overlies the passivation structure and comprises a first conductive layer, a dielectric layer, and a second conductive layer. The first conductive layer is disposed between the dielectric layer and the passivation structure. The second conductive layer extends along a top surface of the dielectric layer and penetrates through the first conductive layer and the passivation structure to the conductive wire.

Integrated chip including an upper conductive structure having multilayer stack to decrease fabrication costs and increase performance

The present disclosure relates to an integrated chip structure. The integrated chip structure includes a substrate. One or more lower interconnects are disposed within a lower inter-level dielectric (ILD) structure over the substrate. A plasma induced damage (PID) mitigation layer is disposed over the lower ILD structure. The PID mitigation layer has a porous structure including a metal. A first upper interconnect is laterally surrounded by an upper ILD structure over the PID mitigation layer. The first upper interconnect extends from over the PID mitigation layer to the one or more lower interconnects.

Film scheme to reduce plasma-induced damage

. Various embodiments of the present disclosure are directed towards a ferroelectric random-access memory (FeRAM) cell or some other suitable type of memory cell comprising a bottom-electrode interface structure. The memory cell further comprises a bottom electrode, a switching layer over the bottom electrode, and a top electrode over the switching layer. The bottom-electrode interface structure separates the bottom electrode and the switching layer from each other. Further, the interface structure is dielectric and is configured to block or otherwise resist metal atoms and/or impurities in the bottom electrode from diffusing to the switching layer. By blocking or otherwise resisting such diffusion, leakage current may be decreased. Further, endurance of the memory cell may be increased.

Bottom-electrode interface structure for memory

In some embodiments, the present disclosure relates to a method that includes forming a dielectric layer over a conductive structure on a substrate. A removal process is performed to remove a portion of the dielectric layer to expose a portion of the conductive structure. The substrate is transported into a cleaning chamber having a wafer chuck below a bell jar structure. A cleaning process is performed to clean the exposed portion of the conductive structure by turning on a noble gas source to introduce a noble gas within the cleaning chamber, turning on an oxygen gas source to introduce oxygen within the cleaning chamber, applying a first bias to a plasma coil to form a plasma gas, and applying a second bias to the wafer chuck. The substrate is removed from the cleaning chamber. A conductive layer is formed over the dielectric layer and coupled to the conductive structure.

Cleaning chamber for metal oxide removal

Method for forming an upper conductive structure having multilayer stack to decrease fabrication costs and increase performance

Various embodiments of the present disclosure are directed towards a ferroelectric random-access memory (FeRAM) cell or some other suitable type of memory cell comprising a bottom-electrode interface structure. The memory cell further comprises a bottom electrode, a switching layer over the bottom electrode, and a top electrode over the switching layer. The bottom-electrode interface structure separates the bottom electrode and the switching layer from each other. Further, the interface structure is dielectric and is configured to block or otherwise resist metal atoms and/or impurities in the bottom electrode from diffusing to the switching layer. By blocking or otherwise resisting such diffusion, leakage current may be decreased. Further, endurance of the memory cell may be increased.

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Hsinchu, Taiwan

Chia-Wen Zhong