摘要:
A writing method for a magnetic random access memory (MRAM) using a bipolar junction transistor is disclosed. The writing method is for use with the MRAM using the bipolar junction transistor including: a semiconductor substrate serving as a base of the bipolar junction transistor; an emitter and a collector of the bipolar junction transistor formed in an active region of the semiconductor substrate; an MTJ cell positioned in the active region between the emitter and the collector, separately from the emitter and the collector by a predetermined distance; a word line formed on the MTJ cell; a bit line connected to the collector; and a reference voltage line connected to the emitter. The writing method for the MRAM using the bipolar junction transistor writes data by applying current from the emitter to the collector, and changing a magnetization direction of a free ferromagnetic layer of the MTJ cell by a magnetic field generated due to the current. The magnetization direction can be varied in a shorter distance than a distance between the MTJ cell and the bit line, thereby reducing current consumption. It is thus possible to improve a property and reliability of the semiconductor device.
摘要:
A biosensor and a sensing cell array using a biosensor are disclosed. Adjacent materials containing a plurality of different ingredients are analyzed to determine the ingredients based on their magnetic susceptibility or dielectric constant. A sensing cell array includes such as a magnetization pair detection sensor including a MTJ (Magnetic Tunnel Junction) or GMR (Giant Magnetoresistive) device, a magnetoresistive sensor including a MTJ device and a magnetic material (current line), a dielectric constant sensor including a sensing capacitor and a switching device, a magnetization hole detection sensor including a MTJ or GMR device, a current line, a free ferromagnetic layer and a switching device, and a giant magnetoresistive sensor including a GMR device, a switching device and a magnetic material (or forcing wordline). Ingredients of adjacent materials are separated based on electrical characteristics of ingredients by sensing magnetic susceptibility and dielectric constant depending on the sizes of the ingredients.
摘要:
A biosensor and a sensing cell array using a biosensor are disclosed. Adjacent materials containing a plurality of different ingredients are analyzed to determine the ingredients based on their magnetic susceptibility or dielectric constant. A sensing cell array includes such as a magnetization pair detection sensor including a MTJ (Magnetic Tunnel Junction) or GMR (Giant Magnetoresistive) device, a magnetoresistive sensor including a MTJ device and a magnetic material (current line), a dielectric constant sensor including a sensing capacitor and a switching device, a magnetization hole detection sensor including a MTJ or GMR device, a current line, a free ferromagnetic layer and a switching device, and a giant magnetoresistive sensor including a GMR device, a switching device and a magnetic material (or forcing wordline). Ingredients of adjacent materials are separated based on electrical characteristics of ingredients by sensing magnetic susceptibility and dielectric constant depending on the sizes of the ingredients.
摘要:
A biosensor and a sensing cell array using a biosensor are disclosed. Adjacent materials containing a plurality of different ingredients are analyzed to determine the ingredients based on their magnetic susceptibility or dielectric constant. A sensing cell array includes such as a magnetization pair detection sensor including a MTJ (Magnetic Tunnel Junction) or GMR (Giant Magnetoresistive) device, a magnetoresistive sensor including a MTJ device and a magnetic material (current line), a dielectric constant sensor including a sensing capacitor and a switching device, a magnetization hole detection sensor including a MTJ or GMR device, a current line, a free ferromagnetic layer and a switching device, and a giant magnetoresistive sensor including a GMR device, a switching device and a magnetic material (or forcing wordline). Ingredients of adjacent materials are separated based on electrical characteristics of ingredients by sensing magnetic susceptibility and dielectric constant depending on the sizes of the ingredients.
摘要:
A biosensor and a sensing cell array using a biosensor are disclosed. Adjacent materials containing a plurality of different ingredients are analyzed to determine the ingredients based on their magnetic susceptibility or dielectric constant. A sensing cell array includes such as a magnetization pair detection sensor including a MTJ (Magnetic Tunnel Junction) or GMR (Giant Magnetoresistive) device, a magnetoresistive sensor including a MTJ device and a magnetic material (current line), a dielectric constant sensor including a sensing capacitor and a switching device, a magnetization hole detection sensor including a MTJ or GMR device, a current line, a free ferromagnetic layer and a switching device, and a giant magnetoresistive sensor including a GMR device, a switching device and a magnetic material (or forcing wordline). Ingredients of adjacent materials are separated based on electrical characteristics of ingredients by sensing magnetic susceptibility and dielectric constant depending on the sizes of the ingredients.
摘要:
A magnetic random access memory (MRAM) having an MTJ cell located between a word line and a gate oxide film, a reference voltage line in a source junction region, and a connection line in a drain junction region. The constitution and fabrication process of the MRAM are simplified to improve productivity and properties of the device.
摘要:
A magnetic random access memory (MRAM) is disclosed. The MRAM may include a semiconductor substrate serving as a base of a bipolar junction transistor; an emitter and a collector of the bipolar junction transistor provided at an active region of the semiconductor substrate; an MTJ cell positioned at the active region between the emitter and the collector, separately from the emitter and the collector by a predetermined distance; and a word line provided on the MTJ cell. The MRAM may also include a bit line contacting the collector; and a reference voltage line contacting the emitter. As a result, the constitution and fabrication process of the MRAM are simplified to improve productivity and properties of the device.
摘要:
A non-volatile memory device and a method for forming the same are disclosed, which relate to a ferroelectric memory device having non-volatile characteristics. The non-volatile memory device includes a control gate configured to receive a read voltage, an insulation film formed over the control gate, a metal layer formed over the insulation film, configured to include a channel region, and a drain region and source region at both ends of the channel region, a ferroelectric layer formed over the channel region of the metal layer, and a program and read gate formed over the ferroelectric layer. A write operation of data corresponding to a resistance state of the channel region is performed by changing polarity of the ferroelectric layer in response to a voltage applied to the program and read gate, the drain and source regions, and the control gate. A read operation of data is performed by sensing a current value changing with a polarity state of the ferroelectric layer on the condition that the read voltage is input to the control gate and a sensing bias voltage is input to one of the drain region and the source region.
摘要:
A phase change memory device includes a phase change resistance cell configured to sense a crystallization state that changes in response to a current so that data corresponding to the crystallization state can be stored in the phase change resistance cell. A write driving control signal generating unit outputs a write enable signal and a precharge enable signal in response to a write control signal that corresponds to a heating period and a quenching period of the write data. A write driving unit is configured to supply a driving voltage corresponding to the write data to the phase change resistance cell in response to the write enable signal and the precharge enable signal.
摘要:
A wafer and a method for forming the same are disclosed. The wafer forming method can separate respective chips from others by performing a Deep Reactive Ion Etching (DRIE) process on a wafer including a plurality of chips. The wafer includes a plurality of chips configured to be arranged in row and column directions on the wafer, a scribe region configured to be formed among the plurality of chips so as to separate each chip, and an alignment key pattern configured to be arranged on the plurality of chips.