PATENT CLAIM ANALYSIS

Application Number: 15933479
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2019-09
Patent Classification: ["257", "421000"]

Abstract:
A perpendicularly magnetized magnetic tunnel junction (p-MTJ) is disclosed wherein a free layer (FL) has a first interface with a MgO tunnel barrier, a second interface with a Mo or W Hk enhancing layer, and is comprised of Fe x Co y B z  wherein x is 66-80, y is 5-9, z is 15-28, and (x+y+z)=100 to simultaneously provide a magnetoresistive ratio >100%, resistance x area product <5 ohm/μm 2 , switching voltage <0.15V (direct current), and sufficient Hk to ensure thermal stability to 400° C. annealing. The FL may further comprise one or more M elements such as 0 or N to give (Fe x Co y B z ) w M 100-w  where w is >90 atomic %. Alternatively, the FL is a trilayer with a FeB layer contacting MgO to induce Hk at the first interface, a middle FeCoB layer for enhanced magnetoresistive ratio, and a Fe or FeB layer adjoining the Hk enhancing layer to increase thermal stability.

Claim (Index 9):
A perpendicularly magnetized magnetic tunnel junction (p-MTJ), comprising:\n (a) a reference layer (RL) with a fixed magnetization oriented in a direction perpendicular to a surface thereof; (b) a tunnel barrier layer comprised of one or more metal oxides formed between a first surface of a free layer and the reference layer; (c) a Hk enhancing layer comprised of W, Mo, or alloys thereof and adjoining a second surface of the free layer that is opposite to the first surface wherein the Hk enhancing layer induces perpendicular magnetic anisotropy (PMA) at an interface with the second surface; and (d) the free layer (FL) with a trilayer configuration (FL1/FL2/FL3) comprised of at least Co, Fe, and B in a total composition that is Fe x Co y B z  where x is 66-80, y is 5-9, z is 15-28, and x+y+z=100, and with a magnetization oriented perpendicular to the first and second surfaces thereof, wherein the FL magnetization may be switched from a direction parallel to the RL direction to an anti-parallel direction to the RL magnetization, the FL comprises;\n (1) a first layer (FL1) that is FeB and which contacts the tunnel barrier layer; \n (2) a second (middle) layer (FL2) that is FeCoB, and wherein FL2 has a higher Co content than FL1 and FL3; and \n (3) a third layer (FL3) that is Fe or FeB and which adjoins the Hk enhancing layer, and wherein FL3 has a higher Fe content than FL2.

Metadata:
- Claim Count in Document: 13.0
- Percentile: 90.0
- Lexical Diversity: 1.86275
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15881035', '15461779', '15477288', '13686169', '13068222']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9337453958913984
- 35 USC 102 Novelty (BERT): 0.5534217063478478
- Combined Prediction Score: 0.8957130269370432
- Mean Citation Score: 371.709174
- Max Citation Score: 421.8547
- Similarity Product: 387.3144301719368

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