Abstract:
A method for forming a MTJ in a spintronic device is disclosed and includes a thin seed layer that enhances perpendicular magnetic anisotropy (PMA) in an overlying laminated layer with a (Co/Ni)n composition. The seed layer is preferably NiCr, NiFeCr, Hf, or a composite thereof. Furthermore, a magnetic layer such as CoFeB may be formed between the laminated layer and a tunnel barrier layer to serve as a transitional layer between a (111) laminate and (100) MgO tunnel barrier. There may be a Ta insertion layer between the CoFeB layer and laminated layer to promote (100) crystallization in the CoFeB layer. The laminated layer may be used as a reference layer, dipole layer, or free layer in a MTJ. Annealing between 300° C. and 400° C. may be used to further enhance PMA in the laminated layer.
Abstract:
A magnetic element in a spintronic device or serving as a propagation medium in a domain wall motion device is disclosed wherein first and second interfaces of a free layer with a perpendicular Hk enhancing layer and tunnel barrier, respectively, produce enhanced surface perpendicular anisotropy to increase thermal stability in a magnetic tunnel junction. The free layer may be a single layer or a composite and is comprised of a glassing agent that has a first concentration in a middle portion thereof and a second concentration less than the first concentration in regions near first and second interfaces. A CoFeB free layer selectively crystallizes along first and second interfaces but maintains an amorphous character in a middle region containing a glass agent providing the annealing temperature is less than the crystallization temperature of the middle region.
Abstract:
A magnetic element is disclosed wherein first and second interfaces of a free layer with a perpendicular Hk enhancing layer and tunnel barrier, respectively, produce enhanced surface perpendicular anisotropy to increase thermal stability in a magnetic tunnel junction (MTJ). The free layer may be a single layer or a composite and is comprised of one or more glassing agents that have a first concentration in a middle portion thereof and a second concentration less than the first concentration in regions near first and second interfaces. As a result, a CoFeB free layer, for example, selectively crystallizes along first and second interfaces but maintains an amorphous character in a middle region containing a glass agent providing the annealing temperature is less than the crystallization temperature of the middle region. The magnetic element may be part of a spintronic device or serve as a propagation medium in a domain wall motion device.
Abstract:
A dual-band antenna for use in a wireless network device comprises first, second, and third radiators. The first and second radiators are connected by a stand portion. The second radiator is a generally C-shaped plate having a connecting section and a free-end portion. A ground end and an input end are provided at predetermined positions of the connecting section and are respectively and electrically connected to a grounding portion and a control circuit of a substrate. The free-end portion overlaps with the orthogonal projection of the first radiator and is parallel to the first radiator. The third radiator is electrically connected to the second radiator via a conductive post and is parallel to the second radiator. The second and third radiators are provided on the substrate while the first radiator is provided outside the substrate. The first, second, and third radiators are parallel to and spaced apart from one another.
Abstract:
The present invention provides a vibration-actuated micro mirror device comprising a substrate having a swinging frame and a reflection mirror, and a vibration part having a first and a second vibration structures coupled to the substrate, wherein the first vibration structure is driven to generate a first complex wave formed by a first and a second wave signals while the second vibration structure is driven to generate a second complex wave formed by a third and a fourth wave signals, and the first and the third wave signals are formed with the same frequency and phase while the second and the fourth wave signals are formed with the same frequency but opposite phases. The first and the second complex waves actuate the substrate such that the swinging frame is rotated about a first axis while the reflection mirror is rotated about a second axis.
Abstract:
A MTJ for a spintronic device is disclosed and includes a thin seed layer that enhances perpendicular magnetic anisotropy (PMA) in an overlying laminated layer with a (Co/Ni)n composition or the like where n is from 2 to 30. The seed layer is preferably NiCr, NiFeCr, Hf, or a composite thereof with a thickness from 10 to 100 Angstroms. Furthermore, a magnetic layer such as CoFeB may be formed between the laminated layer and a tunnel barrier layer to serve as a transitional layer between a (111) laminate and (100) MgO tunnel barrier. There may be a Ta insertion layer between the CoFeB layer and laminated layer to promote (100) crystallization in the CoFeB layer. The laminated layer may be used as a reference layer, dipole layer, or free layer in a MTJ. Annealing between 300° C. and 400° C. may be used to further enhance PMA in the laminated layer.
Abstract:
The present disclosure provides a swinging device having a swinging mechanism disposed on an energy provider, wherein volume and shape of the swinging mechanism and a distance between the swinging mechanism and the energy provider are adjusted so as to control the ratio of the distance and a characteristic value corresponding to the swinging mechanism in a specific range such that the swinging mechanism is capable of resonating with respect to the rotation of the energy provider. The swinging mechanism is capable of detecting the rotating frequency of the energy provider as well as combining with a display unit which is capable of displaying information with respect to the rotating status or displaying image patterns controlled according to the rotating status.
Abstract:
The present invention provides a vibration-actuated micro mirror device comprising a substrate having a swinging frame and a reflection mirror, and a vibration part having a first and a second vibration structures coupled to the substrate, wherein the first vibration structure is driven to generate a first complex wave formed by a first and a second wave signals while the second vibration structure is driven to generate a second complex wave formed by a third and a fourth wave signals, and the first and the third wave signals are formed with the same frequency and phase while the second and the fourth wave signals are formed with the same frequency but opposite phases. The first and the second complex waves actuate the substrate such that the swinging frame is rotated about a first axis while the reflection mirror is rotated about a second axis.
Abstract:
A capacitor structure is disclosed. The capacitor structure includes at least a D1+ first-level array. The D1+ first-level array comprises three first D1+ conductive pieces and a second D1+ conductive piece. Two of the first D1+ conductive pieces are disposed in a first row of the D1+ first-level array, and the remaining first D1+ conductive piece and the second D1+ conductive piece are disposed in a second row of the D1+ first-level array from left to right. The adjacent first D1+ conductive pieces are connected to each other, and the first D1+ conductive pieces are not connected to the second D1+ conductive piece.
Abstract:
A method of writing a magneto-resistive random access memory (MRAM) cell includes providing a writing pulse to write a value to the MRAM cell; and verifying a status of the MRAM cell immediately after the step of providing the first writing pulse. In the event of a write failure, the value is rewritten into the MRAM cell.