Invention Grant
- Patent Title: Self-aligned middle of the line (MOL) contacts
-
Application No.: US15878486Application Date: 2018-01-24
-
Publication No.: US10074564B2Publication Date: 2018-09-11
- Inventor: Daniel Chanemougame , Ruilong Xie , Lars Liebmann
- Applicant: GLOBALFOUNDRIES INC.
- Applicant Address: KY Grand Cayman
- Assignee: GLOBALFOUNDRIES INC.
- Current Assignee: GLOBALFOUNDRIES INC.
- Current Assignee Address: KY Grand Cayman
- Agency: Gibb & Riley, LLC
- Agent Francois Pagette
- Main IPC: H01L29/417
- IPC: H01L29/417 ; H01L21/768 ; H01L21/8238 ; H01L21/28 ; H01L27/092 ; H01L29/66 ; H01L23/522 ; H01L29/40 ; H01L29/78 ; H01L23/528

Abstract:
Disclosed are methods and integrated circuit (IC) structures. The methods enable formation of a gate contact on a gate above (or close thereto) an active region of a field effect transistor (FET) and provide protection against shorts between the gate contact and metal plugs on source/drain regions and between the gate and source/drain contacts to the metal plugs. A gate with a dielectric cap and dielectric sidewall spacer is formed on a FET channel region. Metal plugs with additional dielectric caps are formed on the FET source/drain regions such that the dielectric sidewall spacer is between the gate and the metal plugs and between the dielectric cap and the additional dielectric caps. The dielectric cap, dielectric sidewall spacer and additional dielectric caps are different materials preselected to be selectively etchable, allowing for misalignment of a contact opening to the gate without risking exposure of any metal plugs and vice versa.
Public/Granted literature
- US20180166335A1 SELF-ALIGNED MIDDLE OF THE LINE (MOL) CONTACTS Public/Granted day:2018-06-14
Information query
IPC分类: