Invention Grant
US08154130B2 Self-aligned metal to form contacts to Ge containing substrates and structure formed thereby
有权
自对准金属与Ge形成的基板和由此形成的结构形成接触
- Patent Title: Self-aligned metal to form contacts to Ge containing substrates and structure formed thereby
- Patent Title (中): 自对准金属与Ge形成的基板和由此形成的结构形成接触
-
Application No.: US12107992Application Date: 2008-04-23
-
Publication No.: US08154130B2Publication Date: 2012-04-10
- Inventor: Cyril Cabral, Jr. , Roy A. Carruthers , Christophe Detavernier , Simon Gaudet , Christian Lavoie , Huiling Shang
- Applicant: Cyril Cabral, Jr. , Roy A. Carruthers , Christophe Detavernier , Simon Gaudet , Christian Lavoie , Huiling Shang
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Scully, Scott, Murphy & Presser PC
- Agent Louis J. Percello, Esq.
- Main IPC: H01L29/40
- IPC: H01L29/40

Abstract:
A method for forming germano-silicide contacts atop a Ge-containing layer that is more resistant to etching than are conventional silicide contacts that are formed from a pure metal is provided. The method of the present invention includes first providing a structure which comprises a plurality of gate regions located atop a Ge-containing substrate having source/drain regions therein. After this step of the present invention, a Si-containing metal layer is formed atop the said Ge-containing substrate. In areas that are exposed, the Ge-containing substrate is in contact with the Si-containing metal layer. Annealing is then performed to form a germano-silicide compound in the regions in which the Si-containing metal layer and the Ge-containing substrate are in contact; and thereafter, any unreacted Si-containing metal layer is removed from the structure using a selective etch process. In some embodiments, an additional annealing step can follow the removal step. The method of the present invention provides a structure having a germano-silicide contact layer atop a Ge-containing substrate, wherein the germano-silicide contact layer contains more Si than the underlying Ge-containing substrate.
Public/Granted literature
- US20080220606A1 SELF-ALIGNED METAL TO FORM CONTACTS TO Ge CONTAINING SUBSTRATES AND STRUCTURE FORMED THEREBY Public/Granted day:2008-09-11
Information query
IPC分类: