摘要:
A phase change memory structure and method for forming the same, the method including providing a substrate comprising a conductive area; forming a spacer having a partially exposed sidewall region at an upper portion of the spacer defining a phase change memory element contact area; and, wherein the spacer bottom portion partially overlaps the conductive area. Both these two methods can reduce active area of a phase change memory element, therefore, reducing a required phase changing electrical current.
摘要:
A phase change memory structure and method for forming the same, the method including providing a substrate comprising a conductive area; forming a spacer having a partially exposed sidewall region at an upper portion of the spacer defining a phase change memory element contact area; and, wherein the spacer bottom portion partially overlaps the conductive area. Both these two methods can reduce active area of a phase change memory element, therefore, reducing a required phase changing electrical current.
摘要:
Thus, the present disclosure provides a method of programming a memory array. At least one memory cell including a magnetic element is provided. At least one current source coupled to the magnetic element is provided. A unipolar current is supplied from the at least one current source to the magnetic element at a plurality of non-zero current levels.
摘要:
The present disclosure provides a method of fabricating a semiconductor device. The method includes providing a semiconductor substrate, forming a dielectric layer over the semiconductor substrate, treating the dielectric layer with a carbon containing group, forming a conductive layer over the treated dielectric layer, and patterning and etching the dielectric layer and conductive layer to form a gate structure. The carbon containing group includes an OCH3 or CN species.
摘要:
Disclosed herein are toggle-mode magnetoresistive random access memory (MRAM) devices having small-angle toggle write lines, and related methods of toggle-mode switching MRAM devices. Also disclosed are layouts for MRAM devices constructed according to the disclosed principles. Generally speaking, the disclosed principles provide for non-orthogonally aligned toggle-mode write lines used to switch toggle-mode MRAM devices that employ a bias field to decrease the threshold needed to switch the magnetic state of each device. While the conventional toggle-mode write lines provide for the desired orthogonal orientation of the applied magnetic fields to optimize device switching, the use of a bias field affects this orthogonal orientation. By non-orthogonally aligning the two write lines as disclosed herein, the detrimental affect of the bias field may be compensated for such that the net fields applied to the device for both lines are again substantially orthogonal, as is desired.
摘要:
A semiconductor device having a semiconductor substrate and a first insulator overlying the semiconductor substrate. A spiral coil inductor overlies the first insulator and a second insulator overlies the spiral coil inductor. A patterned ferromagnetic film overlies the second insulator and a patterned magnetic-bias film overlies the patterned ferromagnetic film.
摘要:
Disclosed herein are various embodiments of a 3-parameter switching technique for MRAM memory cells arranged on an MRAM array. The disclosed technique alters the relationship between the disturbance margin and write margin of MRAM arrays to reduce the overall disturbance for the arrays by either enlarging the write margin with respect to the original disturbance margin or enlarging the disturbance margin in view of the original write margin. In either approach, the disclosed 3-parameter switching technique successfully decreases the inadvertent writing of unselected bits.
摘要:
An apparatus and methods for a non-volatile magnetic random access memory (MRAM) device that includes a word line, a bit line, and a magnetic thin film memory element located at an intersection of the word and bit lines. The magnetic thin film memory element includes an alloy of a rare earth element and a transition metal element. The word line is operable to heat the magnetic thin film memory element when a heating current is applied. Heating of the magnetic thin film memory element to a predetermined temperature reduces its coercivity, which allows switching of the magnetic state upon application of a magnetic field. The magnetic state of the thin film element can be determined in accordance with principles of the Hall effect.
摘要:
A method and circuits are disclosed for sensing an output of a memory cell having high and low resistance states. A high reference cell is in high resistance state and a low reference cell is in low resistance state. The resistance of the high reference cell in high resistance state has a first margin of difference from the resistance of the memory cell in high resistance state. The resistance of the low reference cell in low resistance state has a second margin of difference from the resistance of the memory cell in low resistance state. Differential amplifiers coupled to the memory cell and the high and low reference cells provide a digital output representing the resistance state of the memory cell.
摘要:
Disclosed herein are various embodiments of a 3-parameter switching technique for MRAM memory cells arranged on an MRAM array. The disclosed technique alters the relationship between the disturbance margin and write margin of MRAM arrays to reduce the overall disturbance for the arrays by either enlarging the write margin with respect to the original disturbance margin or enlarging the disturbance margin in view of the original write margin. In either approach, the disclosed 3-parameter switching technique successfully decreases the inadvertent writing of unselected bits.