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Modified tungsten silicon

專利號
US10096609B2
公開日期
2018-10-09
申請人
GLOBALFOUNDRIES INC.(KY Grand Cayman)
發(fā)明人
Nicolas L. Breil; Domingo A. Ferrer; Keith Kwong Hon Wong
IPC分類
H01L23/525; H01L27/112; H01L23/522; H01L23/532; H01L21/768
技術(shù)領(lǐng)域
tungsten,mx,silicon,tetragonal,layer,conductive,may,fuse,deposition,be
地域: Grand Cayman

摘要

A method for forming a precision resistor or an e-fuse structure where tungsten silicon is used. The tungsten silicon layer is modified by changing the crystalline structure to a tetragonal tungsten silicon layer.

說明書

1 2 3 4 5 6 7 8 9 10 11

Referring to FIG. 1, a tungsten silicon layer 110, for use in semiconductor devices, may be created by depositing tungsten silicon on an Mx layer 100. The resulting tungsten silicon layer 110 may have a chemical formula of WSix, where the ratio of silicon located in the crystal lattice of the structure is 2.2 to 3.0 that of tungsten, more preferably 2.6 to 2.8 that of tungsten, even more preferably 2.7 that of tungsten. The deposition of the tungsten silicon layer 110 may be performed using any suitable method in the art such as, for example, atomic layer deposition (ALD), chemical vapor deposition (CVD), physical vapor deposition (PVD), molecular beam deposition (MBD), pulsed laser deposition (PLD), or liquid source misted chemical deposition (LSMCD). Following the deposition, the thickness of the tungsten silicon layer 110 may be 10 to 20 nm. The tungsten silicon layer 110 may be deposited on Mx layer 100, wherein the Mx layer 100 may be any suitable material, such as, for example, conductors, insulators, or combinations thereof. In an example embodiment, the Mx layer 100 may be an insulator such as, for example, metal oxides, metal nitrides or metal oxynitrides. In other embodiments, the Mx layer 100 may have a combination of insulator layers and conductive layers. In such embodiments, the conductive metal may be, for example, copper, aluminum, tungsten or combinations thereof.

權(quán)利要求

1
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