Invention Grant
- Patent Title: Method of forming high-voltage transistor with thin gate poly
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Application No.: US18214072Application Date: 2023-06-26
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Publication No.: US12029041B2Publication Date: 2024-07-02
- Inventor: Chun Chen , James Pak , Unsoon Kim , Inkuk Kang , Sung-Taeg Kang , Kuo Tung Chang
- Applicant: Cypress Semiconductor Corporation
- Applicant Address: US CA San Jose
- Assignee: INFINEON TECHNOLOGIES LLC
- Current Assignee: INFINEON TECHNOLOGIES LLC
- Current Assignee Address: US CA San Jose
- Main IPC: H10B43/40
- IPC: H10B43/40 ; H01L21/265 ; H01L21/28 ; H01L21/285 ; H01L29/423 ; H01L29/45 ; H01L29/49 ; H01L29/51 ; H01L29/66 ; H01L29/78 ; H01L29/792 ; H10B41/30 ; H10B41/49 ; H10B43/30 ; H10B43/35

Abstract:
A semiconductor device and method of fabricating the same are disclosed. The method includes depositing a polysilicon gate layer over a gate dielectric formed over a surface of a substrate in a peripheral region, forming a dielectric layer over the polysilicon gate layer and depositing a height-enhancing (HE) film over the dielectric layer. The HE film, the dielectric layer, the polysilicon gate layer and the gate dielectric are then patterned for a high-voltage Field Effect Transistor (HVFET) gate to be formed in the peripheral region. A high energy implant is performed to form at least one lightly doped region in a source or drain region in the substrate adjacent to the HVFET gate. The HE film is then removed, and a low voltage (LV) logic FET formed on the substrate in the peripheral region. In one embodiment, the LV logic FET is a high-k metal-gate logic FET.
Public/Granted literature
- US20240008279A1 Method of Forming High-Voltage Transistor with Thin Gate Poly Public/Granted day:2024-01-04
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