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 11):
A method for manufacturing a semiconductor device comprising the steps of:\n (a) providing a semiconductor substrate of a first conductivity type having a main surface, and a back surface facing to the main surface; (b) forming a first semiconductor region of a second conductivity type different from the first conductivity type in the semiconductor substrate, and at a position separated from the main surface; (c) doping an impurity of the first conductivity type into the first semiconductor region, and thereby forming a second semiconductor region of the second conductivity type; (d) forming a third semiconductor region of the first conductivity type between the first semiconductor region and the main surface, and in contact with the first semiconductor region; (e) forming a fourth semiconductor region of the second conductivity type between the third semiconductor region and the main surface, and in contact with the third semiconductor region; (f) forming a gate electrode over the main surface via a gate insulation film in such a manner as to partially overlap the fourth semiconductor region; and (g) forming a fifth semiconductor region of the second conductivity type opposite to the fourth semiconductor region across the gate electrode in the semiconductor substrate, wherein the impurity density of the second semiconductor region is lower than the impurity density of the the first 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): 0.9075975152938476
- 35 USC 102 Novelty (BERT): 0.5083871563116473
- Combined Prediction Score: 0.8676764793956276
- Mean Citation Score: 262.11700600000006
- Max Citation Score: 293.1805
- Similarity Product: 255.7207731386424

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