PATENT CLAIM ANALYSIS

Application Number: 15766391
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-10
Patent Classification: ["257", "703000"]

Abstract:
Provided is a heat-sink-attached power-module substrate, in which a metal layer and first layers are formed from aluminum sheets having a purity of 99.99 mass % or greater and a heat sink and second layers are formed from aluminum sheets having a purity lower than that of the metal layer and the first layers: when a thickness is t1 (mm), a joined-surface area is A1 (mm2), yield strength at 25° C. is σ11 (N/mm2), yield strength at 200° C. is σ12 (N/mm2) in the second layers; a thickness is t2 (mm), a joined-surface area is A2 (mm2), yield strength at 25° C. is σ21 (N/mm2), and yield strength at 200° C. is σ22 (N/mm2) in the heat sink.

Claim (Index 3):
A heat-sink-attached power-module substrate comprising:\n one sheet of ceramic substrate; a circuit layer formed from a plurality of small-circuit layers which are bonded on one surface of the ceramic substrate with spacing each other; one sheet of metal layer bonded on the other surface of the ceramic substrate; a power-module substrate provided with the ceramic substrate, the circuit layer and the metal layer; and one sheet of heat sink bonded on the metal layer of the power-module substrate with one sheet of heat-radiation-side bonding-core member therebetween, wherein each of the small-circuit layers has a stacking structure configured from a first layer bonded on the ceramic substrate and a second layer bonded on a surface of the first layer: the metal layer and the first layers are formed from aluminum sheets having a purity of 99.99 mass % or greater: the heat sink and the second layers are formed from aluminum sheets having a purity lower than that of the metal layer and the first layers: the heat-radiation-side bonding-core member is formed from an aluminum-alloy sheet: when a thickness of the second layers is t1 (mm), a sum total of joined-surface areas of the second layers is A1 (mm 2 ), yield strength of the second layers at 25\u00b0 C. is \u03c311 (N/mm 2 ), and yield strength of the second layers at 200\u00b0 C. is \u03c312 (N/mm 2 ); a thickness of the heat sink is t2 (mm), a joined-surface area of the heat sink is A2 (mm 2 ), yield strength of the heat sink at 25\u00b0 C. is \u03c321 (N/mm 2 ), and yield strength of the heat sink at 200\u00b0 C. is \u03c322 (N/mm 2 ); and a thickness of the heat-radiation-side bonding-core member is t4 (mm), a joined-surface area of the heat-radiation-side bonding-core member and the metal layer is A4 (mm 2 ), yield strength of the heat-radiation-side bonding-core member at 25\u00b0 C. is \u03c341 (N/mm 2 ), and yield strength of the heat-radiation-side bonding-core member at 200\u00b0 C. is \u03c342 (N/mm 2 ), a ratio (0 x A1\u00d7\u03c311)/(t2\u00d7A2 \u00d7\u03c321+t4\u00d7A4\u00d7\u03c341) at 25\u00b0 C. is 0.85 to 1.40 inclusive; and a ratio (t1\u00d7A1\u00d7\u03c312)/(t2\u00d7A2\u00d7\u03c322+t4\u00d7A4\u00d7\u03c342) at 200\u00b0 C. is greater than 1.0 fold but no more than 1.4 fold as the ratio at 25\u00b0 C.

Metadata:
- Claim Count in Document: 50.0
- Percentile: 91.0
- Lexical Diversity: 2.4
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15306559', '15028173', '15305689', '15320798', '14761697']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9049207395145564
- 35 USC 102 Novelty (BERT): 0.5225961228675468
- Combined Prediction Score: 0.8666882778498555
- Mean Citation Score: 258.25444200000004
- Max Citation Score: 323.9240000000001
- Similarity Product: 268.72950522661216

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

Dataset: test