200results about How to "Improve installation density" patented technology

An antenna apparatus is provided that includes a printed wiring board, electronic components disposed on the printed wiring board, a shielding member (ground member) that is disposed on the printed wiring board. The shielding member has a length along a predetermined directional axis X set substantially to ¼λ or more, the wavelength of an electromagnetic wave used for communication being λ. An antenna element extends in a direction crossing the directional axis X and is grounded to the shielding member (ground member).

There are provided a transmission/reception switching circuit which is small in insertion loss and harmonic distortion and allows an increase in the output power of a power amplifier and an electronic component for communication on which the transmission/reception switching circuit is mounted. As an element composing a transmission/reception switching circuit in a wireless communication system, series-connected FETs or a multi-gate FET are used in place of a diode. Gate resistors connected between the individual gate terminals and a control terminal are designed to have resistance values which become progressively smaller from the gate to which a highest voltage is applied toward the gate to which a lowest voltage is applied.

A semiconductor device, comprising: a flexible substrate; at least one semiconductor element; at least one electrode for external connection, the element and the electrode being formed on a front surface of the flexible substrate; and at least one wire formed on the front surface to electrically connect the element to the electrode, wherein at least a part of the flexible substrate has a curved form.

An optical backplane includes an optical connector which receives juxtaposed optical signals transmitted in nonparallel to the main surface of a circuit substrate from the circuit substrate or transmits juxtaposed optical signals in nonparallel to the main surface of the circuit substrate to the circuit substrate. The optical connector disposes and accommodates edge portions of a plurality of optical fibers and the disposing direction of the optical fibers in the optical connector is in nonparallel to the main surface of the circuit substrate.

A semiconductor chip mounting wiring board 2 includes an insulating resin substrate 5, a first conductive bump 12 formed on one side of the insulative resin substrate 5 to mount a semiconductor chip 3, a wiring pattern 15 extending from the first conductive bump 12 toward the periphery of the insulating resin substrate 5, a filled viahole 9 leading from the other side of the insulating resin substrate 5 to the wiring pattern 15, and a second conductive bump 13, or a conductive pad 19, positioned just above the filled viahole 9 and electrically connected to the viahole 9.

A semiconductor module is produced by mounting the semiconductor chip 3 in advance on the first conductive bump 12 on the semiconductor chip mounting wiring board 2 and stacking a plurality of the wiring boards 2 and interlayer members 20 each having an opening 27 to receive the semiconductor chip 3 and a conductive post 26 or conductive pad connected to the second conductive bump 13 of the wiring board 2 alternately on each other with an adhesive applied between them, placing another interconnecting circuit board such as an I/O wiring board 30 or the like on an outermost layer, and by applying hot-pressing to the stack. The semiconductor module thus produced has a high connection reliability and can be designed for a high mounting density and a lower profile.

A semiconductor light emitting device (A) includes a resin package (5), a semiconductor light emitting element (4), a first lead (1A) and a second lead (1B). The resin package (5) has an upper surface and a bottom surface, and has translucency. The semiconductor light emitting element (4) is covered with the resin package (5) in a state where the semiconductor light emitting element faces the upper surface of the resin package (5). The first lead (1A) includes a bonding pad (11A) which supports the semiconductor light emitting element (4). The second lead (1B) is separated from the first lead (1A), and is electrically connected to the semiconductor light emitting element (4) via a wire (6). The leads (1A, 1B) have mounting terminals (13A, 13B) which are exposed from the bottom surface of the resin package (5). The mounting terminals (13A, 13B) are surrounded by the resin package (5) in an in-plane direction perpendicular to the thickness direction of the resin package.

A power semiconductor device with improved productivity, reduced size and reduction of amounting area therefore is provided. In the provided power semiconductor device, an external terminal does not limit an increase in current. The power semiconductor device is sealed with transfer molding resin. In the power semiconductor device, a cylindrical external terminal communication section is arranged on a wiring pattern so as to be substantially perpendicular to the wiring pattern. An external terminal can be inserted and connected to the cylindrical external terminal communication section. The cylindrical external terminal communication section allows the inserted external terminal to be electrically connected to the wiring pattern. A taper is formed at, at least, one end of the cylindrical external terminal communication section, which one end is joined to the wiring pattern.

The optical connector comprising a housing (2), a first ferrule section (3) for holding an optical fiber having a damping or filtering function, a second ferrule section (3') for holding an ordinary optical fiber, and an aligning sleeve (5) for aligning the first and second ferrule sections (3, 3') for detachable abutment.

A lighting apparatus for dental purposes having plurality of light sources supported on semi-conductor bases, which are mounted on a substrate is provided. The lighting apparatus includes a reflective over surface encircling the light sources which reflects visible light. The lighting apparatus may be deployed in a light hardening device as a light source unit with the emitted light beams being conducted, in particular, by a prismatic body, to a light guiding conduit.

The present invention relates to a soldering flux, a soldering paste and a soldering method that achieve a sufficient degree of bonding strength even when components are mounted at a higher density, components are further miniaturized or components are mounted with a smaller pitch. A flux 3 contains an adhesive resin and a hardening agent. This flux or a soldering paste containing the flux is applied onto a component mounting board 1, and then, an electronic component 4 is mounted and soldered onto the component mounting board 1.

A communication module includes a circuit substrate having a first high-frequency processing section related to mobile phone communication, a second high-frequency processing section that processes reception signals related to satellite positioning systems, a system section having a baseband processing section and application processing section, and a power circuit section, a sealing member covering the electronic components mounted on the circuit substrate, a conductive shield layer formed on a surface of the sealing member, and a shield wall formed in the sealing member so as to demarcate a mounting area of the first high-frequency processing section and a mounting area of the second high-frequency processing section.

The evaporative cooling system comprises: evaporative cooling modules, a liquid supply system which comprises a liquid supply pump and a tube, and which supplies a refrigerant liquid to the evaporative cooling modules; an air supply system which comprises air supply tubes, and which supplies warm air to the evaporative cooling modules; an exhaust system which comprises an exhaust pump and a tube, and which exhausts air containing a refrigerant vapor from the evaporative cooling modules; a reflux system which comprises a primary heat exchanger and a reflux tube, and which condenses the refrigerant vapor to return the condensed refrigerant liquid to the liquid supply system; and a heat exhaust system which comprises a secondary heat exchanger and tubes, and which discharges heat absorbed from the primary heat exchanger.

The invention relates to a method for preparing a highly heat-conductive copper-clad plate, which is realized by the following steps of: preparing gluewater; preparing a gluewater solution with the solid content of 60-90% by using a mixture of polyfunctional epoxy resin and polyurethane; taking an inorganic filler which adopts a mixture of aluminium nitride and aluminium oxide as the main contents, wherein aluminium nitride content accounts for 40-60 wt% of the total weight of the mixture, and aluminium oxide content accounts for 40-60 wt% of the total weight of the mixture; using the inorganic filler after being fully and uniformly mixed as the filler of the gluewater solution; using dicyandiamide as a curing agent, imidazole as an accelerating agent and acetone as a solvent to prepare the gluewater solution with the solid content of 60-80% and the gel time of 150-450 seconds for application; putting the gluewater solution into a glue mixer and then conveying the gluewater solution to a heating medium oil vertical gluing machine; and preparing a single-surface or double-surface copper-clad plate. The prepared copper-clad plate has high heat conductivity, capability of holding a higher installation density and excellent dimension stability, and can be used for preparing printed circuit boards with finer wiring and more layers.

In a connector housing block 260 comprising an interface member 200 for electrically connecting a test head body 100 with sockets 320 in an electronic device testing apparatus, a connector housing 240 provided with a plurality of connector pins 242 in a non-floating state is attached to a block base 230 in a floating state via a coil spring 250. Due to the configuration, the number of parts of the connector housing 240 can be reduced, mounting density of the connector pins 242 can be improved, and a positional error of the connector housing 240 can be absorbed.

A low profile module is provided that has a high functionality achieved by increasing the component mounting density. In spite of achieving high functionality in a module 100 by respectively mounting components such as a semiconductor substrate 104 and chip components 105 on the two main surfaces 101a and 101b of a wiring substrate 101, the low-profile module 100 can be provided which has a high functionality as a result of increasing its component mounting density by forming a thickness Ha of a first component layer 102 formed by mounting only the semiconductor substrate 104 face down on one main surface 101a of the wiring substrate 101 so as to be smaller than the thickness of a second component layer 103 formed by mounting a plurality of chip components 105 on the other main surface 101b of the wiring substrate 101.

A radio base station (100A) has a directional antenna (110A) by which the beam direction (D1) which is a direction to which a directional beam is directed can be changed in a vertical plane. The radio base station (100A) acquires a terminal altitude value indicating the altitude of a radio terminal connected to the radio base station (100A), and sets a tilt angle (θ) which is an angle made by the beam direction (D1) and the horizontal direction by use of the acquired terminal altitude value.

The embodiment of the invention provides a storage device capable of being accessed through a memory bus. The storage device comprises an interface controller, a storage module, a storage controller, a command register, a status register and a cache. In addition, the interface controller can be in electrical connection with a memory bank interface of a computer system. The interface controller receives an access command, for accessing the storage module, transmitted by a CPU. The interface controller writes the access command in the command register and records the current access status or result through the status register. The storage controller performs status setting on the status register according to the access command in the command register and performs corresponding read-write operations on the storage module. The storage device can be in electrical connection with the memory bank interface of the computer system, the size of the storage device is small, space is saved, and therefore the installation density and the storage capacity of the storage device are increased. As the command register and the status register are additionally arranged, the data access space of the storage device is not limited by addressing space provided by the CPU any longer.

A connection structure for connecting a differential signal transmission cable to a circuit board. A differential signal transmission cable includes an outer conductor provided around a pair of signal line conductors via an insulator. Parts of the signal line conductors are exposed from a tip of the differential signal transmission cable. A circuit board is provided with a pair of signal pads and a ground pad. A shield-connecting terminal includes a main body which is crimp-connected to the outer conductor and a solder-connecting pin which is solder-connected to the ground pad. The exposed parts of the signal line conductors are solder-connected to the signal pads, respectively, and the outer conductor is solder-connected to the ground pad via the solder-connecting pin of the shield-connecting terminal.