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 3):
The method of  claim 2 , wherein the step of etching the source and drain film, the etching stop film, and the semiconductor film comprising metallic elements by using the photoresist layer to form the pattern comprising the source, the drain and the active layer comprises:\n wet etching the source and drain film for a first time, to retain the source and drain film in a region corresponding to the first photoresist completely retained region, the second photoresist completely retained region, and the photoresist partially retained; dry etching the etching stop film for a first time, to retain the etching stop film in a region corresponding to the first photoresist completely retained region, the second photoresist completely retained region, and the photoresist partially retained; ashing the photoresist layer in the first photoresist completely retained region, the second photoresist completely retained region, and the photoresist partially retained region, to completely remove the photoresist layer in the photoresist partially retained region, and thin the photoresist layer in the first photoresist completely retained region and the second photoresist completely retained region; wet etching the source and drain film for a second time, to retain the source and drain film in a region corresponding to the first photoresist completely retained region and the second photoresist completely retained region, so as to form a pattern comprising source and drain; wet etching the semiconductor film comprising metallic elements, to retain the semiconductor film comprising metallic elements in a region corresponding to the first photoresist completely retained region, the second photoresist completely retained region, and the photoresist partially retained region, so as to form a pattern comprising active layer; dry etching the etching stop film for a second time, to remove the etching stop film in a region corresponding to the photoresist partially retained region; and removing the photoresist layer in the first photoresist completely retained region and the second photoresist completely retained region.

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): 0.919805825432742
- 35 USC 102 Novelty (BERT): 0.5058990272657988
- Combined Prediction Score: 0.8784151456160477
- Mean Citation Score: 248.24347000000003
- Max Citation Score: 261.064
- Similarity Product: 174.92755802822114

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