Powerchip Semiconductor Manufacturing Corporation

Wen Chung Yang

Wei-Chang Lin

Shih Hsi Chen

Provided is a memory device including a substrate, a plurality of word-line structures, a plurality of cap structures, and a plurality of air gaps. The word-line structures are disposed on the substrate. The cap structures are respectively disposed on the word-line structures. A material of the cap structures includes a nitride. The nitride has a nitrogen concentration decreasing along a direction near to a corresponding word-line structure toward far away from the corresponding word-line structure. The air gaps are respectively disposed between the word-line structures. The air gaps are in direct contact with the word-line structures. A method of forming a memory device is also provided.

Method of forming memory device

Memory device and method of forming the same

A memory device and a manufacturing method of the memory device are provided. The manufacturing method includes steps below. A plurality of stack structures including a tunneling dielectric layer and a floating gate are formed on a substrate. A liner material layer including a nitride liner layer is formed on the substrate. A top surface of the nitride liner layer is lower than a top surface of the floating gate and is higher than a top surface of the tunneling dielectric layer. An isolation material layer covering the liner material layer is formed on the substrate. The isolation material layer is oxidized, and a portion of the isolation material layer is removed to form an isolation structure. An inter-gate dielectric layer covering the stack structures and the isolation structure is formed on the substrate. A control gate covering the inter-gate dielectric layer is formed on the substrate.

Growing community of inventors

Miaoli County, Taiwan

Wen Chung Yang