PATENT CLAIM ANALYSIS

Application Number: 15765120
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-10
Patent Classification: ["257", "330000"]

Abstract:
A provided method of manufacturing a semiconductor device includes formation of an interlayer insulating. The interlayer insulating film includes first and second insulating layers. The first insulating layer covers an upper surface of each of the gate electrodes. The second insulating layer is located on the first insulating layer. A contact hole is provided in the interlayer insulating film at a position between the trenches. Then the interlayer insulating film is heated at a temperature lower than the softening temperature of the first insulating layer and higher than the softening temperature of the second insulating layer so as to make a surface of the second insulating layer into a curved surface so that surfaces of end portions of the second insulating layer are sloping from the corresponding contact holes so as to be displaced upward toward a center of the corresponding trench.

Claim (Index 8):
A semiconductor device, comprising:\n a semiconductor substrate; a plurality of trenches provided in an upper surface of the semiconductor substrate; a gate insulating film located in each of the trenches; a gate electrode located in each of the trenches and insulated from the semiconductor substrate by the gate insulating film; an interlayer insulating film including a first insulating layer and a second insulating layer, wherein the first insulating layer covers an upper surface of each of the gate electrodes and the upper surface of the semiconductor substrate, the second insulating layer is located on the first insulating layer and has a softening temperature lower than that of the first insulating layer, and a contact hole is provided in the interlayer insulating film at a position between each pair of adjacent two of the trenches; and an upper electrode layer covering the interlayer insulating film and the contact holes, wherein an upper surface of the first insulating layer is flat, a surface of the second insulating layer is curved, surfaces of end portions of the second insulating layer are sloping from the corresponding contact holes so as to be displaced upward toward a center of the corresponding trench, a surface of a center portion of the second insulating layer is a convex curved surface, and the surfaces of the end portions of the second insulating layer are concave curved surfaces.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 90.0
- Lexical Diversity: 2.24242
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15174337', '15425411', '14886281', '15425714', '15325954']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9189195522646402
- 35 USC 102 Novelty (BERT): 0.4880942720995312
- Combined Prediction Score: 0.8758370242481293
- Mean Citation Score: 235.84134
- Max Citation Score: 257.613
- Similarity Product: 222.3551601730585

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