PATENT CLAIM ANALYSIS

Application Number: 16217455
Application Type: Utility
Filing Date: 2018-12
Publication Date: 2019-04
Patent Classification: ["257", "415000"]

Abstract:
This method for manufacturing a lead-free niobate-system ferroelectric thin film device includes: a lower electrode film formation step of forming a lower electrode film on a substrate; a ferroelectric thin film formation step of forming a niobate-system ferroelectric thin film on the lower electrode film; an etch mask pattern formation step of forming an etch mask in a desired pattern on the niobate-system ferroelectric thin film; and a ferroelectric thin film etching step of shaping the niobate-system ferroelectric thin film into a desired fine pattern by wet etching using an etchant comprising: a predetermined chelating agent including at least one selected from EDTMP, NTMP, CyDTA, HEDP, GBMP, DTPMP, and citric acid; an aqueous alkaline solution containing an aqueous ammonia solution; and an aqueous hydrogen peroxide solution.

Claim (Index 1):
A method for manufacturing a niobate-system ferroelectric thin film device comprising:\n a lower electrode film formation step of forming a lower electrode film on a substrate; a ferroelectric thin film formation step of forming a niobate-system ferroelectric thin film on the lower electrode film; an etch mask pattern formation step of forming an etch mask in a desired pattern on the niobate-system ferroelectric thin film; an etchant preparation step of preparing an alkaline etchant comprising a predetermined chelating agent, an aqueous alkaline solution and an aqueous hydrogen peroxide solution; and a ferroelectric thin film etching step of shaping the niobate-system ferroelectric thin film into a desired fine pattern by wet etching using the alkaline etchant, wherein the predetermined chelating agent comprises at least one selected from ethylenediamine tetra(methylene phosphonic acid), nitrilotris(methylene phosphonic acid), cyclohexane diamine tetraacetic acid, 1-hydroxyethane-1,1-diphosphonic acid(etidronic acid), glycine-N,N-bis(methylene phosphonic acid), diethylenetriamine penta(methylene phosphonic acid), and citric acid; and the aqueous alkaline solution comprises an aqueous ammonia solution, and wherein the etchant preparation step is a two-liquid mixing process in that a separately prepared concentrated solution containing the predetermined chelating agent and the aqueous alkaline solution is mixed and diluted with the aqueous hydrogen peroxide solution.

Metadata:
- Claim Count in Document: 38.0
- Percentile: 98.0
- Lexical Diversity: 2.15385
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15548543', '15560679', '15171804', '14274787', '15559870']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9309593038748027
- 35 USC 102 Novelty (BERT): 0.6225887717997957
- Combined Prediction Score: 0.9001222506673021
- Mean Citation Score: 478.890616
- Max Citation Score: 567.58685
- Similarity Product: 527.2313592520297

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