PATENT CLAIM ANALYSIS

Application Number: 16407266
Application Type: Utility
Filing Date: 2019-05
Publication Date: 2019-08
Patent Classification: ["257", "617000"]

Abstract:
The disclosure is directed to a method to recover the gate oxide integrity yield of a silicon wafer after rapid thermal anneal in an ambient atmosphere comprising a nitrogen containing gas, such as NH 3  or N 2 . Generally, rapid thermal anneals in an ambient atmosphere comprising a nitrogen containing gas, such as NH 3  or N 2  to thereby imprint an oxygen precipitate profile can degrade the GOI yield of a silicon wafer by exposing as-grown crystal defects (oxygen precipitate) and vacancies generated by the silicon nitride film. The present invention restores GOI yield by stripping the silicon nitride layer, which is followed by wafer oxidation, which is followed by stripping the silicon oxide layer.

Claim (Index 1):
A single crystal silicon wafer comprising two major, parallel surfaces, one of which is a front surface and one of which is a back surface, a central plane between the front surface and the back surface, a circumferential edge joining the front surface and the back surface, a front surface layer having a depth, D, measured from the front surface and toward the central plane, and a bulk region is between the front surface layer and the central plane, wherein:\n the bulk region comprises oxygen precipitates at a density of at least about 1 \u00d710 7 cm \u22123  and a peak density of oxygen precipitates of at least about 1\u00d710 9  cm \u22123 , wherein the peak density is between the front surface layer and the central plane; the front surface layer comprises oxygen precipitates at a density of less than about 1 \u00d710 7  cm \u22123 , wherein the depth, D, of the front surface layer is between about 1 micrometers and about 40 micrometers; and the front surface has no gate oxide integrity pattern related crystal defect bands.

Metadata:
- Claim Count in Document: 32.0
- Percentile: 100.0
- Lexical Diversity: 1.8806
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15840178', '10120714', '11082267', '14084212', '10430798']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9335304997117068
- 35 USC 102 Novelty (BERT): 0.6067779901114864
- Combined Prediction Score: 0.9008552487516848
- Mean Citation Score: 403.78163799999993
- Max Citation Score: 592.9336
- Similarity Product: 433.29221534919736

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