Nan Ya Technology Corporation

Mao-Quan Chen

Chung-Lin Huang

Ching-Nan Hsiao

The memory cell of the present invention has two independent storage regions embedded into two opposite sidewalls of the control gate respectively. In this way, the data storage can be more reliable. Other features of the present invention are that the thickness of the dielectric layers is different, and the two independent storage regions are formed on opposite bottom sides of the opening by the etching process and form a shape like a spacer. The advantage of the aforementioned method is that the fabricating process is simplified and the difficulty of self-alignment is reduced.

Method of fabricating a memory cell

A method for manufacturing a flash memory includes providing a substrate with a sacrificial oxide layer, a sacrificial poly-Si layer, a hard mask layer and a trench exposing part of the substrate and filled with an oxide layer, later depositing a oxide layer conformally on the sacrificial oxide layer and the oxide layer, and afterwards removing the oxide layer on the sacrificial oxide layer and on the top of the oxide layer and the sacrificial oxide layer to form a spacer as a STI oxide spacer.

Growing community of inventors

Changhua County, Taiwan

Mao-Quan Chen