PATENT CLAIM ANALYSIS

Application Number: 16147345
Application Type: Utility
Filing Date: 2018-09
Publication Date: 2019-02
Patent Classification: ["257", "197000"]

Abstract:
Methods for providing improved isolation structures in a SiGe BiCMOS process are provided. In one method, an n-type epitaxial layer is grown over a p-type high-resistivity substrate. A mask covers a first region, and exposes a second region, of the epitaxial layer. A p-type impurity is implanted through the mask, counter-doping the second region to become slightly p-type. Shallow trench isolation (STI) and optional deep trench isolation (DTI) regions are formed through the counter-doped second region, thereby providing an isolation structure. The first region of the epitaxial layer forms a collector region of a heterojunction bipolar transistor. In another method, shallow trenches are etched partially into the epitaxial layer through a mask. A p-type impurity is implanted through the mask, thereby counter-doping thin exposed regions of the epitaxial layer to become slightly p-type. The shallow trenches are filled with dielectric material and a CMP process is performed to form shallow trench isolation regions.

Claim (Index 1):
A semiconductor structure comprising:\n a semiconductor substrate having a first conductivity type; an epitaxial region formed over the semiconductor substrate, wherein the epitaxial region has a second conductivity type, opposite the first conductivity type, and wherein the epitaxial region forms a collector region of a heterojunction bipolar transistor; and an isolation region formed on the semiconductor substrate, wherein the isolation region includes: one or more shallow trench isolation regions; one or more deep trench isolation regions; and one or more lightly doped regions of the first conductivity type, each having a sheet resistance of at least about 50 K\u03a9/square.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 97.0
- Lexical Diversity: 2.18987
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15588011', '15658252', '16116816', '15727159', '12069941']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9382545118236496
- 35 USC 102 Novelty (BERT): 0.5960821531799899
- Combined Prediction Score: 0.9040372759592836
- Mean Citation Score: 410.425668
- Max Citation Score: 549.6093
- Similarity Product: 437.7119317091525

Labels:
- Claim Label 101: 1
- Claim Label 102: 0
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 1

Dataset: test