摘要:
An object of the present invention is to provide a radio frequency integrated circuit module that is less susceptible to the electromagnetic influence and that is not degraded in electric connection. The radio frequency circuit module of the present invention including circuit elements mounted on a multi-layer circuit substrate having dielectric layers is characterized in that an exposed connection portion is provided by removing a part of the dielectric, and a strip line connected to said circuit elements and a co-axial line for transmitting a radio frequency signal from/to said strip line are connected together in a bottom portion of said exposed connection portion so as to be rectilinear in a three dimensional way.
摘要:
A semiconductor device evaluation apparatus for correctly measuring emission noise of a semiconductor device includes: an electromagnetic field measurement unit for measuring a two-dimensional electromagnetic field distribution in a plane parallel to an upper surface of a semiconductor device; a distribution image generation unit for not only extracting a distribution of an electromagnetic field higher than a threshold value determined in advance from the electromagnetic field distribution of the semiconductor device measured by the electromagnetic field measurement unit but converting the extracted electromagnetic field distribution to a distribution image in a two-dimensional plane; an image collation unit for collating the distribution image generated by the distribution image generation unit with a projected image, generated in advance, of an interconnect and a lead frame of the semiconductor device; and an emission source specifying unit for specifying an interconnect or a lead frame whose images are superposed, if the images of the electromagnetic field distribution, and the interconnects and lead frames are superposed on each other in collation by the image collation unit, as an emission source.
摘要:
Bidimensional electromagnetic emission level monitoring equipment for detecting the electric fields or the magnetic fields of RF (Radio Frequency) emissions from equipment under test by moving an electromagnetic probe bidimensionally. The measuring frequency, the scanning range of the probe, and the distance between measuring points are entered on a keyboard of a controller. A spectrum analyzer selectively receives RF emissions of a designated frequency from the probe in response to an instruction from the controller and feeds emission level signal data to the controller as digital signals. A probe scanning section loaded with the probe is moved bidimensionally by a motor driver under the control of the controller. The controller delivers to a display an emission level distribution signal representative of an electromagnetic distribution based on the emission level data and position data associated with the probe.
摘要:
A method and apparatus of transforming a bit-reversed order vector into a natural order vector in a vector processing system. The invention includes a main memory having a multi-bank system, stored optimal access-address interval information, bit-reversed order sequence circuity, and permutation circuitry. The invention executes bit-reversal processing without giving rise to bank conflict.
摘要:
Spherical graphite cast iron utilized to prepare a lapping tool is manufactured by casting a molten composition into a mold cavity, and by chilling one side of the resulting casting thereby causing unidirectional solidification, the one side being used as the operating surface of the lapping tool. The molten composition consists essentially of 3.0-3.8 wt. % of carbon, 2.0-2.9 wt. % of silicon, 0.3-0.9 wt. % of manganese, less than 0.05 wt. % of phosphorus, less than 0.03 wt. % of sulfur, 0.2-1.0 wt. % of nickel, 0-0.8 wt. % of copper, 0.05-0.5 wt. % of molybdenum, 0.03-0.09 wt. % of magnesium and the balance of iron. The lapping tool made of this casting has a percentage of sphericity of higher than 80%, graphite particle diameter of less than 100 microns, a density of graphite particles of larger than 70/mm.sup.2, and a Vickers hardness of larger than 200.
摘要:
There is provided a shield-structured loop element which can suppress noise via a silicon substrate and can be manufactured by a semiconductor process. The loop element includes: a first well of a first polarity that is formed on a substrate; a deep well of a second polarity that is formed below the first well; a ring-shaped second well of a second polarity that is formed on the deep well along an outer periphery of the deep well; a third well of the first polarity that is formed in an island area surrounded by the deep well and the second well; a looped conductor that is formed in a layer above the third well and has smaller outer dimensions than those of the third well; and a first path that connects the second well to a bias power supply. The second well and the deep well are electrically connected to each other.
摘要:
An IC package which can avoid electromagnetic waves leaked from a side surface of the IC package includes: an electric circuit board on which an IC chip is mounted; a first conductive board arranged at a position facing the electric circuit board while the IC chip on the electric circuit board is sandwiched therebetween; and a magnetic body which is arranged on a surface of the first conductive board on a side facing the IC chip and which is arranged at least partially on end portions of the first conductive board.
摘要:
An electric field sensor or a magnetic field sensor includes an optical fiber and an electro-optic layer or a magneto-optic layer. The electro-optic layer or a magneto-optic layer is provided on an end surface of an end portion of the optical fiber. The end surface of the optical fiber is a convex shape. The optical fiber may have the end portion with a shape of a substantial cone formed by extending the end portion, and the electro-optic layer or the magneto-optic layer may be formed on a side surface of a front end of the substantial cone. A dielectric layer may be further included between the optic layer and the end surface.
摘要:
(Problem) This invention provides a high-purity, high-concentrated silica sol with long-term stability and low viscosity by preventing viscosity-increase after production, and method for producing the same. This invention provides the high-purity and high-concentrated silica sol that does not undergo a viscosity-increase or gelation in spite of any particle size differences of silica. This is obtained by adding a dispersing agent at a specific concentration to the reaction solution or solvent substitution-concentrated solution in the production process.(Means to Solve Problems) A silica sol produced by an alkoxide method, wherein said silica sol comprises at least a dispersing agent and silica, wherein said dispersing agent concentration is 10-3000 ppm with respect to the silica, wherein said dispersing agent consists of one or more compounds selected from inorganic acid, inorganic acid salt, organic acid and organic acid salt whose degradation temperature and boiling point are both 60° C. or higher, wherein said silica sol has a silica concentration of 20 weight % or higher, and method for producing the same.
摘要:
Two coil forming elements (12, 14) formed of conductor layers and a contact means (19), which is formed in an interlayer dielectric film (13) interposed between the conductor layers and brings the upper and lower coil forming elements into contact with each other through a via hole form a stacked coil (10). One end of the stacked coil is connected to an upper grounding layer (27) of a strip line (20), and the other end of the stacked coil is connected to a strip conductor (23) of the strip line. The number of turns of the stacked coil is larger than 1. A magnetic flux penetrating through the stacked coil increases to be able to induce a relatively large electromotive force. Thus, a high spatial resolution can be obtained easily.