PATENT CLAIM ANALYSIS

Application Number: 15888071
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2019-08
Patent Classification: ["257", "347000"]

Abstract:
A multi-layer SiN stressing stack (structure) including a thin lower SiN layer and a thick upper SiN layer is formed over NiSi silicide structures and functions to generate tensile channel stress in NMOS transistors. The lower SiN layer is formed directly on the silicided surfaces, and has a low hydrogen content and a relatively low residual stress. The upper SiN layer is then formed on the lower SiN layer using process parameters that produce a relatively high residual stress, and also cause the upper SiN material to have relatively high hydrogen content. The lower SiN layer functions as a barrier that prevents/minimizes hydrogen migration to the silicide structures, which prevents defects leading to NiSi failures. The upper SiN layer functions to generate desirable high tensile stress in the underlying NMOS channel region to enhance the mobility of channel electrons. In some embodiments other dielectric materials are used.

Claim (Index 5):
The method of  claim 4 , wherein forming the first dielectric layer comprises depositing silicon nitride using a plasma enhanced chemical vapor deposition (PE CVD) process such that said first dielectric layer has a thickness in the range of 50 Angstroms to 300 Angstroms.

Metadata:
- Claim Count in Document: 26.0
- Percentile: 88.0
- Lexical Diversity: 1.975
- Patent Class: 257.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['13520618', '10849689', '10799788', '13034902', '11119522']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9243053411807652
- 35 USC 102 Novelty (BERT): 0.4981806666401973
- Combined Prediction Score: 0.8816928737267085
- Mean Citation Score: 218.3841
- Max Citation Score: 237.48834
- Similarity Product: 169.642898462044

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test