摘要:
A multilayer printed wiring board includes a multilayered structure having conductor circuit layers and interlaminar insulative layers, the interlaminar insulative layers including an outermost interlaminar insulative layer, the conductor circuit layers including an outermost conductor circuit layer formed over the outermost interlaminar insulative, a filled-viahole formed in the outermost interlaminar insulative layer and having one or more metal plating fillings and completely closing a hole formed through the outermost interlaminar insulative layer such that the metal plating of the filled-viahole extends out of the hole and forms a substantially flat surface, and solder bumps including a first solder bump formed on the substantially flat surface of the filled-viahole and a second solder bump formed on a surface portion in the outermost conductor circuit layer. The substantially flat surface of the filled-viahole is leveled substantially at the same height as the surface portion of the outermost conductor circuit layer.
摘要:
The present invention is to provide a multilayered printed circuit board free from cracks attributed to thermal expansion difference between a solder resist layer and another part and a multilayered printed circuit board of the present invention comprises a conductor circuit and a resin insulating layer serially formed on a substrate in an alternate fashion and in repetition and a solder resist layer formed as an outermost layer, and the solder resist layer contains an inorganic filler.
摘要:
In an optical pickup compatible with BD and HD DVD, when DPP method is used as a tracking error signal detection system for both BD and HD DVD, since the guide groove pitch of the optical disc differs between BD and HD DVD, when a diffraction grating for generation of three beams is shared by both, it is difficult to adjust a spot distance on recording layer of optical disc to ½ of the guide groove pitch for both. Assuming that lateral magnification of the BD optical system is M1, lateral magnification of the HD DVD optical system is M2, a spot distance of three beams on BD-R/RE is S1, a spot distance of three beams on HD DVD-R/RW is S2 the guide groove pitch of BD-R/RE is T1 and the guide groove pitch of HD DVD-R/RW is T2, a setting is made to meet Formulas 1 and 2.
摘要:
A game system performs processing for playing a time-trial racing game or a ranking racing game while allowing a plurality of players to operate moving objects and changing the moving objects in a relay. A right to participate in a race is relayed from a moving object participating in the race to another moving object which is a target of the relay and standing by at a relay line on a racetrack by causing the moving object to touch the other moving object.
摘要:
The present invention provides a multilayer printed wiring board having a filled viahole structure advantageously usable for forming a fine circuit pattern thereon, and having an excellent resistance against cracking under a thermal shock or due to heat cycle. The multilayer printed wiring board is comprised of conductor circuitry layers and interlaminar insulative resin layers deposited alternately one on another, the interlaminar insulative resin layers each having formed through them holes each filled with a plating layer to form a viahole. The surface of the plating layer exposed out of the hole for the viahole is formed substantially flat and lies at a substantially same level as the surface of the conductor circuit disposed in the interlaminar insulative resin layer. The thickness of the conductor circuitry layer is less than a half of the viahole diameter and less than 25 μm. The inner wall of the hole formed in the interlaminar insulative resin layer is roughened and an electroless plating layer is deposited on the roughened surface. An electroplating layer is filled in the hole including the electroless plating layer to form the viahole. The interlaminar insulative resin layer is formed from a composite of a fluororesin showing a high fracture toughness and a heat-resistant thermoplastic resin, a composite of fluororesin and thermosetting resin or a composite of thermosetting and thermoplastic resins.
摘要:
A manual hydraulic steering apparatus is provided for a vessel, which is fitted with a dashboard D having a larger hole D1 and a smaller hole D2 both cut through it. The steering apparatus includes a tilting mechanism 1 positioned on one side of the dashboard D and a hydraulic pump 51 positioned on the other side. The tilting mechanism 1 includes a mounting plate 3 in contact with the dashboard D. A tilt housing 2 is fixed to the mounting plate 3 and has an oil feeding tank 11 formed in an upper portion thereof. The feeding tank 11 has an oil feeding port 12a, in which an oil plug 12 is fitted removably. A semispherical shell 4 is supported turnably in all directions by the tilt housing 2. A steering shaft 5 is supported rotatably by the semispherical shell 4. The hydraulic pump 51 includes a pump casing 52, which has a mounting part 52b extending into the larger hole D1 of the dashboard D. The mounting plate 3 of the tilting mechanism 1 is fixed to the mounting part 52b of the pump casing 52. The hydraulic pump 51 has a driving shaft 53 extending through the mounting part 52b of the pump casing 52 and the mounting plate 3 of the tilt housing 2. The steering shaft 5 is coupled to the driving shaft 53 rotatably with the driving shaft and tiltably on a horizontal axis perpendicular to the driving shaft. An oil feeding pipe 13 extends through the smaller hole D2 of the dashboard D and communicates with the oil feeding tank 11 and the oil tank 54 of the hydraulic pump 51.
摘要:
For optical disk apparatus compatible with multiple standards, employing multiple source beams with different wavelengths, less costly implementations of the photodetecting optics section and associated circuitry are presented. A photodetector plane dedicated to RF signal detection is provided. By bandwidth combining an RF signal detected by this plane is with another signal from other photodetector planes, S/N ratio is improved. For beam splitting, diffraction gratings are used and adjustment precision requirement is relaxed greatly. AC amplifiers can be used as RF photocurrent amplifiers.
摘要:
A first display element 1 and a second display element 2 are provided in a stacked configuration. The first display element 1 includes a liquid crystal panel 10 in which a liquid crystal layer 18 is held between first and second transparent substrates 11 and 12, a reflective polarization plate 3 that is provided on the side of the first transparent substrate 11 and a polarization plate 4 that is provided on the side of the second display element 2. In the example shown in FIG. 1, the reflective polarization plate 3 and polarization plate 4 are common to the first display element 1 and the second display element 2. The reflective polarization plate 3 transmits light that oscillates in a specified direction and reflects light that oscillates in a direction intersecting with the specified direction, and is joined directly to the liquid crystal panel 10 via an adhesive layer with a uniform refractive index.
摘要:
A device testing apparatus including a connection terminal to which an electronic device under test is detachably attached, a pusher for pushing the electronic device in the direction of the connection terminal so as to connect the electronic device to the connection terminal, and a cooling unit for cooling the electronic device. As the cooling unit, an element cooling the device using electricity is for example used. The cooling unit includes a cooling medium blower for blowing a cooling medium around the electronic device and heat exchange projections or depressions for raising the cooling efficiency by blowing a cooling medium. In the device testing apparatus, even if the electronic device generates heat on its own during testing, the electronic device is cooled through the pusher, connection terminals, or socket, so the effect of the heat generated by the electronic device is canceled out and the electronic device can be tested at the predetermined temperature as prescribed in the specification.
摘要:
A device testing apparatus including a connection terminal to which an electronic device under test is detachably attached, a pusher for pushing the electronic device in the direction of the connection terminal so as to connect the electronic device to the connection terminal, and a cooling unit for cooling the electronic device. As the cooling unit, an element cooling the device using electricity is for example used. The cooling unit includes a cooling medium blower for blowing a cooling medium around the electronic device and heat exchange projections or depressions for raising the cooling efficiency by blowing a cooling medium. In the device testing apparatus, even if the electronic device generates heat on its own during testing, the electronic device is cooled through the pusher, connection terminals, or socket, so the effect of the heat generated by the electronic device is canceled out and the electronic device can be tested at the predetermined temperature as prescribed in the specification.