PATENT CLAIM ANALYSIS

Application Number: 15741923
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-07
Patent Classification: ["438", "104000"]

Abstract:
An oxide semiconductor film etching method includes the step of: preparing a substrate ( 1 ) with an oxide semiconductor formed on a surface thereof, the oxide semiconductor film ( 7 ) containing In, Sn, and Zn; and etching the oxide semiconductor film ( 7 ) using an etching solution containing ammonium fluoride.

Claim (Index 11):
A method for manufacturing a semiconductor device including a substrate, a thin-film transistor supported on the substrate, and a terminal section supported on the substrate, the terminal section including a gate connecting portion, an oxide connecting portion, a source connecting portion, and an external connecting portion, the method comprising the steps of:\n (a) forming a gate conductive film on the substrate and patterning the gate conductive film to thereby form a gate line, a gate electrode of the thin-film transistor, and the gate connecting portion of the terminal section; (b) forming a gate insulating layer that covers the gate me, the gate electrode, and the gate connecting portion and has a first opening located above the gate connecting portion; (c) forming an oxide semiconductor film containing In, Sn, and Zn and a metal film in this order on the gate insulating layer and in the first opening; (d) patterning the oxide semiconductor film and the metal film, wherein step (d) of patterning includes the step of etching the metal film and the oxide semiconductor film collectively using an etching solution containing ammonium fluoride and the step of removing part of the metal film by dry etching to expose a portion of the oxide semiconductor film which portion later serves as a channel region of the thin-film transistor and a portion of the oxide semiconductor film which portion later serves as the oxide connecting portion, a source electrode of the thin-film transistor, a drain electrode of the thin-film transistor, and the source connecting portion of the terminal section being thereby formed from the metal film; (e) forming a first insulating layer that covers the thin-film transistor and the terminal section and has a second opening located above the oxide connecting portion; (f) forming a first transparent electrode on the first insulating layer; (g) forming a reducing second insulating layer on the first insulating layer and in the second opening, the reducing second insulating layer having the ability to reduce an oxide semiconductor contained in the oxide semiconductor film, the second insulating layer being in contact with a park of the oxide connecting portion within the second opening to cause the part of the oxide connecting portion which part is in contact with the second insulating layer to be reduced and form a decreased-resistance region having a lower electrical resistance than the channel region; (h) forming a third opening in the second insulating layer, a part of the decreased-resistance region being exposed through the third opening; and (i) forming a transparent conductive film on the second insulating layer and in the third opening and patterning the transparent conductive film to thereby form a second transparent electrode and an external connecting portion that is in contact with the decreased-resistance region of the oxide connecting portion within the third opening.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 86.0
- Lexical Diversity: 1.63889
- Patent Class: 438.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['12593045', '13064080', '15747774', '15569422', '15109553']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8703473510050957
- 35 USC 102 Novelty (BERT): 0.496928389360782
- Combined Prediction Score: 0.8330054548406645
- Mean Citation Score: 263.603538
- Max Citation Score: 271.02112
- Similarity Product: 221.332572797966

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