PATENT CLAIM ANALYSIS

Application Number: 16017495
Application Type: Utility
Filing Date: 2018-06
Publication Date: 2018-10
Patent Classification: ["257", "051000"]

Abstract:
A bipolar transistor is described. In accordance with one aspect of the present invention the bipolar transistor comprises a semiconductor body including a collector region and a base region arranged on top of the collector region. The base region has a first crystalline structure and is at least partly doped with dopants of a first doping type. The collector region is laterally enclosed by a trench isolation and is doped with dopants of a second doping type. The transistor further comprises a conductive base contact layer laterally enclosing the base region which is doped with dopants of the first doping type. The base contact layer comprises a part with the first crystalline structure and a part with a second crystalline structure, wherein the part with the second crystalline structure laterally encloses the part with the first crystalline structure. The transistor further comprises an emitter region arranged on the base region, wherein the emitter region is doped with dopants of the second doping type and forming a pn-junction with the base region.

Claim (Index 10):
A method for fabricating a bipolar transistor (BT), the method comprising:\n forming a base contact layer on top of a semiconductor body, the base contact layer comprising: an outer portion comprising a polycrystalline structure, the outer portion directly formed on top of a trench isolation structure of the semiconductor body; and an inner portion comprising a monocrystalline structure,\n forming an insulating layer on top of the base contact layer; \n forming an opening through the insulating layer and the base contact layer: \n to remove a sub-portion of the monocrystalline inner portion of the base contact layer such that: a part of the monocrystalline inner portion remains under the insulating layer; and outer walls of the inner portion contact inner walls of the polycrystalline outer portion in a horizontal direction; and inner walls of the remaining part of the inner portion form at least part of the opening;\n forming, through the opening, a collector region in a first semiconductor layer, and wherein the collector region: \n is doped with dopant atoms of a second doping type, laterally adjoins a remaining portion of the semiconductor layer, and is between the remaining portions of the first semiconductor layer in a horizontal direction;\n after forming the collector region, forming a monocrystalline base region on top of the collector region, the base region being doped with dopants of the first doping type and the base region laterally adjoining the inner walls of the remaining part of the inner portion such that: \n the base region replaces the removed sub-portion of the monocrystalline inner portion; and in a horizontal direction the remaining part of the inner portion is between the base region and the outer portion, wherein the base region and the base contact layer form a single, horizontal layer;\n forming an emitter region doped with dopants of the second doping type on top of the base region.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 94.0
- Lexical Diversity: 3.05085
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14860431', '15449199', '14267651', '10496531', '14556352']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.91157118309176
- 35 USC 102 Novelty (BERT): 0.5591522629317796
- Combined Prediction Score: 0.876329291075762
- Mean Citation Score: 317.34478
- Max Citation Score: 412.15997
- Similarity Product: 405.8603442988646

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

Dataset: test