Invention Grant
- Patent Title: Semiconductor devices and methods to enhance electrostatic discharge (ESD) robustness, latch-up, and hot carrier immunity
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Application No.: US15899117Application Date: 2018-02-19
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Publication No.: US10483258B2Publication Date: 2019-11-19
- Inventor: Mayank Shrivastava , Milova Paul , Harald Gossner
- Applicant: Indian Institute of Science
- Applicant Address: IN Karnataka, Bangalore
- Assignee: INDIAN INSTITUTE OF SCIENCE
- Current Assignee: INDIAN INSTITUTE OF SCIENCE
- Current Assignee Address: IN Karnataka, Bangalore
- Agency: Michael Best & Friedrich LLP
- Priority: IN201741006745 20170225
- Main IPC: H01L27/02
- IPC: H01L27/02 ; H01L27/12 ; H01L29/78 ; H01L29/74 ; H01L21/8238 ; H01L27/092 ; H01L27/088 ; H01L21/8234 ; H01L27/06

Abstract:
The present disclosure relates to non-planar ESD protection devices. The present disclosure provides a device structure and method of fabricating the structure that is essentially immune to latch-up and possess high ESD robustness and reliability. In an aspect, the present disclosure provides a mixed silicidation and selective epitaxy (epi) FinFET processes for latch-up immunity together with ESD robustness, thereby allowing achievement of ESD efficient parasitic structures together with latch-up immune and reliable functional devices. The present disclosure provides a dual silicidation scheme where ESD protection element(s) have fins that are partially silicided, and functional devices have fins that are fully silicided. The present disclosure also provides a hybrid contact and junction profile scheme where ESD protection element(s) have fins that are partially silicided with or without deep junctions depending on their application, and functional devices have fins that are fully silicided with the silicide edge crossing the junction. On the other hand, a dual Epi scheme is implemented such that ESD protection elements have fins with Epi contact, and functional devices have fins that are fully silicided without Epi (raised S/D) contact.
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