PATENT CLAIM ANALYSIS

Application Number: 16089572
Application Type: Utility
Filing Date: 2018-09
Publication Date: 2019-05
Patent Classification: ["216", "013000"]

Abstract:
The invention relates to a solution for etching titanium based materials, comprising from about 27 w % to about 39 w % hydrogen peroxide, from about 0.2 w % to about 0.5 w % potassium hydroxide, and at about 0.002 w % to about 0.02 w % 1,2-Diaminocyclohexane-N,N,N,N Tetra acetic Acid (CDTA), the rest being water, said solution comprising no corrosion inhibitor, and said solution having a pH comprised between about 7 and about 8. The invention further relates to a chemical composition for preparing such a solution by mixing said composition with concentrated hydrogen peroxide, said chemical composition comprising potassium hydroxide from about 5 w % to about 30 w %, C.D.T.A. at a concentration ranging from about 1% to about 5% of the potassium hydroxide concentration, the rest being water. The invention also relates to a method of etching a Titanium, Titanium nitride or Titanium Tungsten barrier layer from a microelectronic device, said method comprising contacting the Titanium, Titanium nitride or Titanium tungsten barrier layer with the solution for a time sufficient to remove the Titanium, Titanium nitride or Titanium tungsten barrier layer.

Claim (Index 8):
A method for preparing an etching solution according to  claim 1 , comprising mixing the composition of  claim 3  with concentrated hydrogen peroxide at a starting concentration ranging from 30 w % to 40 w % so as to reach a pH comprised between 7 and 8.

Metadata:
- Claim Count in Document: 9.0
- Percentile: 97.0
- Lexical Diversity: 2.55422
- Patent Class: 216.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['11563858', '14368714', '15138835', '15821217', '11212628']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7671956719860943
- 35 USC 102 Novelty (BERT): 0.4956581358601037
- Combined Prediction Score: 0.7400419183734953
- Mean Citation Score: 220.009198
- Max Citation Score: 226.87445
- Similarity Product: 146.22142533136008

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

Dataset: test