PATENT CLAIM ANALYSIS

Application Number: 15900383
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-10
Patent Classification: ["257", "292000"]

Abstract:
The performances of a semiconductor device are improved. A semiconductor device has a transfer transistor and a photodiode. The photodiode has an n type semiconductor region, an n +  type semiconductor region, and a second p type semiconductor region surrounded by a first p type semiconductor region of an interpixel isolation region. The n +  type semiconductor region is formed on the main surface side of the semiconductor substrate, and the n type semiconductor region is formed under the n +  type semiconductor region via the second p type semiconductor region. In the channel length direction of the transfer transistor, in the n type semiconductor region, an n −−  type semiconductor region having a lower impurity density than that of the n type semiconductor region is arranged, to improve the transfer efficiency of electric charges accumulated in the photodiode.

Claim (Index 1):
A semiconductor device, comprising:\n a semiconductor substrate of a first conductivity type having a main surface, and a back surface facing to the main surface; a gate electrode formed over the main surface via a gate insulation film, having a desirable width in a first direction, and extending in a second direction orthogonal to the first direction; a first semiconductor region and a second semiconductor region having a second conductivity type different from the first conductivity type, and formed in the semiconductor substrate in such a manner as to interpose the gate electrode therebetween in the first direction; a third semiconductor region of the first conductivity type situated between the second semiconductor region and the back surface, being in contact with the second semiconductor region, and extending in the first direction; a fourth semiconductor region of the second conductivity type situated between the third semiconductor region and the back surface, being in contact with the third semiconductor region, extending in the first direction, and extending in a third direction pointing from the main surface toward the back surface; and a fifth semiconductor region of the second conductivity type formed in the fourth semiconductor region, wherein the impurity density of the fifth semiconductor region is lower than the impurity density of the fourth semiconductor region.

Metadata:
- Claim Count in Document: 13.0
- Percentile: 88.0
- Lexical Diversity: 2.63158
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15802937', '15363585', '15364456', '14804290', '14850690']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.907655556498024
- 35 USC 102 Novelty (BERT): 0.5073320077647572
- Combined Prediction Score: 0.8676232016246974
- Mean Citation Score: 262.11700600000006
- Max Citation Score: 293.1805
- Similarity Product: 260.7793604274094

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

Dataset: test