Invention Grant
- Patent Title: Self-aligned low dielectric constant gate cap and a method of forming the same
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Application No.: US15837236Application Date: 2017-12-11
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Publication No.: US10229852B2Publication Date: 2019-03-12
- Inventor: Balasubramanian Pranatharthiharan , Injo Ok , Charan V. V. S. Surisetty
- Applicant: International Business Machines Corporation
- Applicant Address: US NY Armonk
- Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
- Current Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
- Current Assignee Address: US NY Armonk
- Agency: Cantor Colburn LLP
- Agent Jennifer Anda
- Main IPC: H01L21/768
- IPC: H01L21/768 ; H01L21/02 ; H01L29/49 ; H01L29/51 ; H01L21/311 ; H01L23/485 ; H01L29/417

Abstract:
According to an embodiment of the present invention, self-aligned gate cap, comprises a gate located on a substrate; a gate cap surrounding a side of the gate; a contact region self-aligned to the gate; and a low dielectric constant oxide having a dielectric constant of less than 3.9 located on top of the gate. According to an embodiment of the present invention, a method of forming a self-aligned contact comprises removing at least a portion of an interlayer dielectric layer to expose a top surface of a gate cap located on a substrate; recessing the gate cap to form a recessed area; depositing a low dielectric constant oxide having a dielectric constant of less than 3.9 in the recessed area; and polishing a surface of the low dielectric constant oxide to expose a contact area.
Public/Granted literature
- US20180090375A1 SELF-ALIGNED LOW DIELECTRIC CONSTANT GATE CAP AND A METHOD OF FORMING THE SAME Public/Granted day:2018-03-29
Information query
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