发明授权
US06294480B1 Method for forming an L-shaped spacer with a disposable organic top coating 有权
用一次性有机顶涂层形成L形间隔物的方法

Method for forming an L-shaped spacer with a disposable organic top coating
摘要:
A method for forming an L-shaped spacer using a sacrificial organic top coating. A semiconductor structure is provided having a gate structure thereon. A liner oxide layer is formed on the gate structure. A dielectric spacer layer is formed on the liner oxide layer. In the preferred embodiment, the dielectric spacer layer comprises a silicon nitride layer or a silicon oxynitride layer. A sacrificial organic layer is formed on the dielectric spacer layer. The sacrificial organic layer and the dielectric spacer layer are anisotropically etched to form spacers comprising a triangle-shaped sacrificial organic structure and an L-shaped dielectric spacer. The triangle-shaped sacrificial organic structure is removed leaving an L-shaped dielectric spacer.
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