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 18):
A method of forming a perpendicular magnetized magnetic tunnel junction (p-MTJ) comprised of a reference layer (RL) with a fixed magnetization oriented perpendicular to a surface thereof, a free layer with a magnetization that is parallel or anti-parallel to the RL magnetization, and a tunnel barrier layer between the reference layer and free layer, comprising:\n (a) providing a stack of layers having an uppermost layer that is a tunnel barrier layer and wherein the tunnel barrier layer is formed on the RL; (b) depositing a free layer on the tunnel barrier layer wherein the free layer comprises at least Fe, Co, and B in a 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 wherein the free layer is formed by a process comprising;\n (1) depositing a first layer (FL1) that is FeB on the tunnel barrier layer; \n (2) depositing a second layer (FL2) that is FeCoB on FL1 wherein FL2 has a higher Co content than FL1; and \n (3) depositing a third layer (FL3) that is Fe or FeB on FL2 wherein FL3 has a higher Fe content than FL2; \n (c) depositing a Hk enhancing layer that is W, Mo, a W alloy, or a Mo alloy on FL3 to give a p-MTJ stack of layers having a RL/tunnel barrier/FL/Hk enhancing layer configuration; and (d) performing an annealing step at a temperature >380\u00b0 C.

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): 0.934259328556962
- 35 USC 102 Novelty (BERT): 0.549852842229939
- Combined Prediction Score: 0.8958186799242596
- Mean Citation Score: 371.709174
- Max Citation Score: 421.8547
- Similarity Product: 348.09383863293533

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