PATENT CLAIM ANALYSIS

Application Number: 15743783
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-07
Patent Classification: ["430", "005000"]

Abstract:
An object is to provide a mask blank for manufacturing a phase shift mask in which a thermal expansion of a phase shift pattern, which is caused when exposure light is radiated onto the phase shift pattern, and displacement of the phase shift pattern are suppressed to be small. A phase shift film has a function of transmitting exposure light from an ArF excimer laser at a transmittance of 2% or higher and 30% or lower and a function of generating a phase difference of 150° or larger and 180° or smaller between the exposure light that has been transmitted through the phase shift film and the exposure light that has passed through air by a distance equal to a thickness of the phase shift film. The phase shift film is formed of a material containing a metal and silicon, and has a structure in which a lower layer and an upper layer are laminated in the stated order from a transparent substrate side. The lower layer has a refractive index n at a wavelength of the exposure light that is smaller than that of the transparent substrate. The upper layer has a refractive index n at the wavelength of the exposure light that is larger than that of the transparent substrate. The lower layer has an extinction coefficient k at the wavelength of the exposure light that is larger than that of the upper layer. The upper layer has a thickness that is larger than that of the lower layer.

Claim (Index 6):
A mask blank according to  claim 1 , wherein the extinction coefficient k of the lower layer is 2.0 or larger.

Metadata:
- Claim Count in Document: 29.0
- Percentile: 86.0
- Lexical Diversity: 2.89011
- Patent Class: 430.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15576937', '15501659', '14222794', '13611707', '13920128']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.790505495010961
- 35 USC 102 Novelty (BERT): 0.5406891971489872
- Combined Prediction Score: 0.7655238652247636
- Mean Citation Score: 351.20439
- Max Citation Score: 381.74677
- Similarity Product: 357.3142900988984

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