PATENT CLAIM ANALYSIS

Application Number: 15778719
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-12
Patent Classification: ["257", "072000"]

Abstract:
A thin film transistor, a method for fabricating the same, an array substrate, and a display panel are disclosed. The method includes: forming a semiconductor film comprising metallic elements, an etching stop film, and a source and drain film on a substrate in this order; and forming a pattern comprising an active layer, an etching stop layer, and a source and drain on the active layer by using a same mask plate, wherein the etching stop layer electrically connects the source and drain with the active layer. Since an etching stop film is formed on a semiconductor film comprising metallic elements, during etching the metal layer, the etching stop film can protect the semiconductor film comprising metallic elements from being etched, and this ensures the performance of the resultant active layer.

Claim (Index 2):
The method of  claim 1 , wherein the step of forming the pattern comprising the active layer, the etching stop layer, and the source and the drain on the active layer by using a same mask plate comprises:\n coating a photoresist layer on the source and drain film; exposing and developing the photoresist layer by using a gray tone mask plate, to form a first photoresist completely retained region in a region corresponding to a pattern of source to be formed, forming a second photoresist completely retained region in a region corresponding to a pattern of drain to be formed, forming a photoresist partially retained region in a region between the region corresponding to the pattern of source to be formed and the region corresponding to the pattern of drain to be formed, and forming a photoresist completely removed region surrounding the region corresponding to a pattern of active layer to be formed; and etching the source and drain film, the etching stop film, and the semiconductor film comprising metallic elements by using the photoresist layer, to form a pattern comprising the source, the drain, and the active layer.

Metadata:
- Claim Count in Document: 12.0
- Percentile: 93.0
- Lexical Diversity: 2.37097
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15221222', '15393030', '14028667', '14406892', '15554446']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9200329099527216
- 35 USC 102 Novelty (BERT): 0.5022384104671606
- Combined Prediction Score: 0.8782534600041655
- Mean Citation Score: 248.24347000000003
- Max Citation Score: 261.064
- Similarity Product: 186.025428314209

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

Dataset: test