PATENT CLAIM ANALYSIS

Application Number: 16026016
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2020-01
Patent Classification: ["257", "051000"]

Abstract:
A thin Ge layer is formed between an SiGe intrinsic base and single-crystal Si extrinsic base structures to greatly simplify the fabrication of raised-base SiGe heterojunction bipolar transistors (HBTs). The fabrication process includes sequentially depositing the SiGe intrinsic base, the Ge, and Si extrinsic base layers as single-crystal structures over a patterned silicon wafer while the wafer is maintained inside a reaction chamber. The Ge layer subsequently functions as an etch stop, and protects the crystallinity of the underlying SiGe intrinsic base material during subsequent dry etching of the Si extrinsic base layer, which is performed to generate an emitter window. A wet etch then removes residual Ge from the emitter window to expose a contact portion of the SiGe layer surface without damage. A polysilicon emitter structure is formed in the emitter window, and then salicide is formed over the base stacks to encapsulate the SiGe and Ge structures.

Claim (Index 6):
The HBT of  claim 1 , further comprising at least one salicide structure contacting both the at least one Si extrinsic base structure and a side edge of the said corresponding first portion of said SiGe intrinsic base structure such that said at least one salicide structure encapsulates the at least one substantially pure Ge layer portion sandwiched therebetween.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 95.0
- Lexical Diversity: 1.97561
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15627227', '10707712', '13689838', '10709220', '14709579']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.912613379196388
- 35 USC 102 Novelty (BERT): 0.5493213118963411
- Combined Prediction Score: 0.8762841724663835
- Mean Citation Score: 314.684744
- Max Citation Score: 406.269
- Similarity Product: 291.26649551081664

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