Abstract:
A method includes measuring a gate leakage current of a plurality of transistors. A single stress bias voltage is applied to the plurality of transistors. The stress bias voltage causes a 10% degradation in a drive current of each transistor within a respective stress period t. One or more relationships are determined, between the measured gate leakage current and one or more of the group consisting of gate voltage, gate length, gate temperature, and gate width of the plurality of transistors, respectively. A negative bias temperature instability (NBTI) lifetime τ of the plurality of transistors is estimated, based on the measured gate leakage current and the one or more relationships.
Abstract:
A method includes measuring a gate leakage current of a plurality of transistors. A single stress bias voltage is applied to the plurality of transistors. The stress bias voltage causes a 10% degradation in a drive current of each transistor within a respective stress period t. One or more relationships are determined, between the measured gate leakage current and one or more of the group consisting of gate voltage, gate length, gate temperature, and gate width of the plurality of transistors, respectively. A negative bias temperature instability (NBTI) lifetime τ of the plurality of transistors is estimated, based on the measured gate leakage current and the one or more relationships.
Abstract:
A method includes measuring a gate leakage current of at least one transistor. A single stress bias voltage is applied to the at least one transistor at a given temperature for a stress period t. The stress bias voltage causes a 10% degradation in a drive current of the transistor at the given temperature within the stress period t. A negative bias temperature instability (NBTI) lifetime τ of the transistor is estimated based on the measured gate leakage current and a relationship between drive current degradation and time observed during the applying step.
Abstract:
An apparatus comprises a circuit for measuring a gate leakage current of a plurality of transistors. A circuit is provided to apply heat to gates of the plurality of transistors. A circuit is provided to apply a single stress bias voltage to the plurality of transistors for a stress period t. The stress bias voltage is sufficient to cause a 10% degradation in a drive current of the transistor within the stress period t. A processor is provided for estimating a negative bias temperature instability (NBTI) lifetime τ of the transistor based on a relationship between the gate leakage current and one or more of the group consisting of gate voltage, gate length, gate temperature, and gate width of the plurality of transistors. The relationship is determined from data observed while applying the single stress bias voltage.
Abstract:
A lamp power assembling structure and method, the lamp power assembling structure is installed indoors and is connected an indoor power source, and includes a lamp power seat and a lamp fixing seat. The lamp power seat has a first power connector for connecting to the indoor power source and two sliding trenches. Each sliding trench has an arced channel and an enlarged hole formed at an end of the arced channel. The lamp fixing seat has a second power connector corresponding to the first power connector and two fasteners separately corresponding to the two enlarged holes. The two fasteners are separately inserted into the two enlarged holes, and the lamp fixing seat is rotated about the first and second power connectors so as to make the two fasteners separately to be engaged with the arced channels to fix the lamp fixing seat to the lamp power seat.
Abstract:
A socket contains: a body, a push member, and a reverse pushing structure. The body includes a connecting section and a fitting section, the connecting section has a first polygonal orifice configured to accommodate a socket wrench, and the fitting section has a second polygonal orifice for driving a fastener element. The body includes a receiving groove defined therein communicating with the second polygonal orifice, and the push member is movably accommodated in the second polygonal orifice and includes at least one magnetic attraction element. The reverse pushing structure is housed in the receiving groove and configured to push the push member toward the rim of the second polygonal orifice.
Abstract:
The current invention provides a method of determining the lifetime of a semiconductor device due to time dependent dielectric breakdown (TDDB). This method includes providing a plurality of samples of dielectric layer disposed as a gate dielectric layer of a MOS transistor, approximating a source/drain current density distribution as a first function of voltage applied on the samples, approximating a substrate current density distribution as a second function of voltage applied on the samples, approximating a dielectric layer lifetime distribution as a third function of source/drain current density and substrate current density in the samples, deriving, from the first, the second, and the third functions, an empirical model wherein a dielectric layer lifetime is a function of voltage applied thereon, and using the model to determine dielectric layer lifetime at a pre-determined operating gate voltage.
Abstract:
A capacitor and methods for forming the same are provided. The method includes forming a bottom electrode; treating the bottom electrode in an oxygen-containing environment to convert a top layer of the bottom electrode into a buffer layer; forming an insulating layer on the buffer layer; and forming a top electrode over the insulating layer.
Abstract:
A method for testing a batch of semiconductor devices in wafer level is provided. The method includes the following steps: (a) obtaining a breakdown voltage of gate dielectric of each semiconductor device; (b) applying, to the gate dielectric of each semiconductor device, a stress voltage below the breakdown voltage but above a base voltage of gate dielectric of the semiconductor devices; (c) after the step (b), measuring currents of gate dielectric of each semiconductor devices at the base voltage; and (d) obtaining a tailing distribution from the measured currents.
Abstract:
A method for forming a resist protect layer on a semiconductor substrate includes the following steps. An isolation structure is formed on the semiconductor substrate. An original nitride layer having a substantial etch selectivity to the isolation structure is formed over the semiconductor substrate. A photoresist mask is formed for partially covering the original nitride layer. A wet etching is performed to remove the original nitride layer uncovered by the photoresist mask in such a way without causing substantial damage to the isolation structure. As such, the original nitride layer covered by the photoresist mask constitutes the resist protect layer.