PATENT CLAIM ANALYSIS

Application Number: 15942754
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-08
Patent Classification: ["438", "404000"]

Abstract:
Reliability of a semiconductor device is improved. Prepared is a substrate in which an insulating layer, a semiconductor layer, and an insulating film are laminated on a semiconductor substrate, and a device isolation region is embedded in a trench. The insulating film in a bulk region is removed; the semiconductor layer in the bulk region is removed by using a first etching liquid; and thereafter the insulating film in the SOI region and the insulating layer in the bulk region are thinned by using a second etching liquid different from the first etching liquid. An impurity is implanted into the semiconductor substrate in the SOI region, and thereafter the insulating film in the SOI region and the insulating layer in the bulk region are removed. An etching speed of each of the insulating film and the insulating layer due to the first etching liquid is smaller than an etching speed of the semiconductor layer by using the first etching liquid. An etching speed of each of the insulating film and the insulating layer due to a second etching liquid is higher than the etching speed of each of the insulating film and the insulating layer due to the first etching liquid.

Claim (Index 23):
The method according to  claim 18 , wherein, in the operation (b), the first insulating film in the first region is removed by etching to expose the semiconductor layer in the first region by using a first mask layer that covers the first insulating film in the second region, and that exposes the first insulating film in the first region, as an etching mask.

Metadata:
- Claim Count in Document: 11.0
- Percentile: 91.0
- Lexical Diversity: 4.09615
- Patent Class: 438.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15603564', '15679047', '15404463', '15043576', '14459999']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8845068399643139
- 35 USC 102 Novelty (BERT): 0.5424599993647933
- Combined Prediction Score: 0.8503021559043618
- Mean Citation Score: 304.068638
- Max Citation Score: 389.08832
- Similarity Product: 340.843867989521

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