Low temperature spacer for advanced semiconductor devices

摘要

Embodiments of the present invention provide semiconductor structures and methods for making the same that include a boron nitride (BN) spacer on a gate stack, such as a gate stack of a planar FET or FinFET. The boron nitride spacer is fabricated using atomic layer deposition (ALD) and/or plasma enhanced atomic layer deposition (PEALD) techniques to produce a boron nitride spacer at relatively low temperatures that are conducive to devices made from materials such as silicon (Si), silicon germanium (SiGe), germanium (Ge), and/or III-V compounds. Furthermore, the boron nitride spacer may be fabricated to have various desirable properties, including a hexagonal textured structure.

主权项

1. A semiconductor device comprising:
a semiconductor body; a gate stack disposed atop the semiconductor body; and a boron nitride spacer in direct contact with sidewalls of the gate stack and at least a portion of the semiconductor body, wherein the boron nitride spacer has a hexagonal textured structure, and the boron nitride spacer either includes an amorphous region which is less than or equal to 5 nm thick or includes no amorphous region.