PATENT CLAIM ANALYSIS

Application Number: 15964306
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2019-10
Patent Classification: ["257", "751000"]

Abstract:
A semiconductor structure includes a conductive feature, a first metal-based etch-stop layer over the underlying structure, a metal-free etch-stop layer over the first metal-based etch-stop layer, a second metal-based etch-stop layer over the metal-free etch-stop layer, an interlayer dielectric layer over the second metal-based etch-stop layer, and an interconnect structure extending through the first metal-based etch-stop layer, metal-free etch-stop layer, and the second metal-based etch-stop layer, wherein a bottom portion of the conductive interconnect structure directly contacts the conductive feature. The first metal-based etch-stop layer may include a first metallic component having one of aluminum, tantalum, titanium, or hafnium, and the second metal-based etch-stop layer may include a second metallic component the same as or different from the first metallic component. The first metal-based etch-stop layer and the second metal-based etch-stop layer may both be free of silicon.

Claim (Index 7):
The semiconductor structure of  claim 1 , wherein a thickness of the first metal-based etch-stop layer is similar to that of the second metal-based etch-stop layer, and wherein a thickness of the metal-free etch-stop layer is at least 1.5 times that of the first metal-based etch-stop layer.

Metadata:
- Claim Count in Document: 23.0
- Percentile: 91.0
- Lexical Diversity: 3.0
- Patent Class: 257.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['13343771', '14222295', '15063358', '14621221', '15920727']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9195297696798852
- 35 USC 102 Novelty (BERT): 0.4915397200586813
- Combined Prediction Score: 0.8767307647177649
- Mean Citation Score: 181.120064
- Max Citation Score: 183.54839
- Similarity Product: 120.9610437483144

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