PATENT CLAIM ANALYSIS

Application Number: 16019772
Application Type: Utility
Filing Date: 2018-06
Publication Date: 2019-02
Patent Classification: ["438", "620000"]

Abstract:
An interlayer insulating film is dry etched using a CHF 3  gas and by using, as a mask, a resist film having a first opening and a second opening that is wider than the first opening, thereby forming a first contact hole of a predetermined depth in the first opening and forming a second contact hole in the second opening. The gas in a furnace is switched to a C 4 F 8  gas and the first contact hole is embedded with a polymer by the C 4 F 8  gas. The gas in the furnace is switched to a CHF 3  gas. With the first contact hole protected by the polymer, the interlayer insulating film is dry etched using the same resist film as a mask, making a depth of the second contact hole a predetermined depth deeper than that of the first contact hole. Thereafter, the resist film and the polymer are removed.

Claim (Index 1):
A method of manufacturing a semiconductor device having a plurality of contact holes of differing depths, the method comprising:\n (a) forming an interlayer insulating film on a semiconductor substrate; (b) forming on the interlayer insulating film, a resist film having a first opening and a second opening having a width that is greater than a width of the first opening; (c) dry etching the interlayer insulating film using the resist film as a mask, thereby forming at a part of the interlayer insulating film exposed at the first opening, a first contact hole having a first depth, and forming at a part of the interlayer insulating film exposed at the second opening, a second contact hole having a second depth; (d) introducing a first gas into a chamber for manufacturing the semiconductor device, thereby depositing a reaction product produced from the first gas, so as to embed the reaction product in the first contact hole; (e) after the step (d), further dry etching the interlayer insulating film with the reaction product embedded in the first contact hole, thereby extending the depth of the second contact hole from the second depth to a third depth, the third depth being greater than the first depth of the first contact hole; (f) removing the resist film; and (g) removing the reaction product and exposing the first contact hole.

Metadata:
- Claim Count in Document: 5.0
- Percentile: 94.0
- Lexical Diversity: 3.07407
- Patent Class: 438.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['10898938', '15337405', '13661105', '12285848', '11657570']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8490891799151873
- 35 USC 102 Novelty (BERT): 0.4956813280714648
- Combined Prediction Score: 0.8137483947308151
- Mean Citation Score: 261.374592
- Max Citation Score: 266.75757000000004
- Similarity Product: 239.87564736705784

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