摘要:
A method for manufacturing a circuit board (7); in which, an electronic component is injected into a resin substrate at a low temperature, and then the resin substrate is improved in its heat withstanding property. The manufacturing method comprises the steps of softening by heat a resin substrate which contains a thermoplastic component and a chemical cross-link component and then injecting an electronic component (1) into the resin substrate; curing the resin substrate by bridging the chemical cross-link component of the resin substrate, making the resin substrate into a heat-withstanding substrate (70); and forming an electric wiring pattern (6) on the heat-withstanding substrate (70) for connection with a protruding electrode (2) of the electronic component (1). The circuit board (7) maintains the high dimensional accuracy throughout the manufacturing process. Thus, the present invention offers a superior circuit board, which is thin and compact in size and has a small thermal deformation rate.
摘要:
A 3D circuit module which is highly reliable, easily layered and able to mount electronic components in high density is obtained by providing a support member having a frame in the periphery thereof and a recess; a coating layer for coating the frame and filling in the recess, the coating layer being made of resin material which is adhesive and has a softening temperature lower than the softening temperature of the support member; a wiring pattern formed on the coating layer, the wiring pattern including a first land on the frame, a second land on the recess, and a wiring part for connecting between the first land and the second land; and an electronic component having a projecting electrode formed on a side thereof, the electronic component being bonded to the coating layer and accommodated in the recess, with the projecting electrode connected to the second land.
摘要:
The present invention includes a plurality of lead terminals made of a conductive material having spring elasticity; and insulative housing that buries a part of the region of lead terminal and fixedly retains a plurality of lead terminals in an arrangement having been set in advance. Lead terminal is composed of a buried part that is a part of lead terminal buried in housing; bottom end joint that is extended from one end of the buried part, is exposed through bottom end surface of housing, and extracted in width direction of bottom end surface; and flexibly changing part that is exposed from another end of the buried part through one wall surface orthogonal to bottom end surface, and is extended along this wall surface to top end surface facing to bottom end surface, being spaced from wall surface and top end surface.
摘要:
An electronic circuit device has a substrate having a wiring pattern, an electronic component electrically connected to a terminal section of the wiring pattern by contacting a projection electrode with it, a cover that is disposed at a position facing the substrate and grapples the electronic component between it and the substrate, and a resin layer made of thermoplastic resin filled in a gap between the substrate and the cover. The gap includes a space in a connection region except an electric connection part between the projection electrode and the terminal section. The electronic component is adhered to the substrate and the substrate is adhered to the cover through the resin layer. Thus, the electronic circuit device having high connection reliability and high mass productivity, and a method and apparatus for manufacturing the electronic circuit device can be provided.
摘要:
A wiring board comprises a patterned wiring formed of electrically conductive resin composed primarily of silver and embedded into a substrate in a manner that a surface thereof is exposed above the substrate, and a covering conductor formed primarily of carbon covering the surface of the patterned wiring. The wiring board of this structure is superior in resistance to moisture absorption and water, prevents silver migration attributable to the moisture, and reduces a contact resistance in the connection between a terminal portion of the wiring board and an external apparatus.
摘要:
It comprises circuit board 10 with circuit pattern 2 formed by conductive resin paste on resin substrate 1, surface-mounted type electronic components 30, 40 arranged with electrode terminals with respect to the connecting region of circuit pattern 2, connecting member 3 formed from conductive resin paste for connecting the connecting region to the electrode terminal, and insulating adhesive 6 for bonding the electronic components 30, 40 and circuit board 10, which is lower in curing temperature than conductive resin paste and disposed in a space between circuit board 10 and electronic components 30, 40 between connecting regions.
摘要:
A dielectric ceramic composition wherein the dielectric constant ∈ is large, the temperature coefficient &tgr;f of the resonance frequency is close to 0, and which as a large Q value, is obtained by adding to and blending with a ceramic composition whose &tgr;f of the resonance frequency is large on the plus side a ceramic composition whose temperature coefficient &tgr;f is large on the minus side. In an Li2O—R2O3—TiO2-based composition, an improved dielectric constant ∈ can be achieved by introducing a specific quantity of Bi2O3, and &tgr;f can be shifted to the plus side and in addition a considerable improvement in Qf achieved by introducing a specific quantity of MO, where M is one or two of Ca and Sr. Furthermore, by introducing a specific quantity of Na2O together with the MO (where M is one or two of CA and Sr), in particular in the case of material of ∈r>150, it is possible to control &tgr;f to the vicinity of 0 while maintaining Qf at an high value.
摘要翻译:介电常数ε大的介电陶瓷组合物,谐振频率的温度系数τf接近于0,并且通过将共振频率的τf加到并掺合陶瓷组合物作为大的Q值, 在正面上较大的是在负侧的温度系数τf大的陶瓷组合物。 在Li 2 O-R 2 O 3 -TiO 2基组合物中,通过引入特定量的Bi 2 O 3可以实现改进的介电常数ε,并且tauf可以转移到正面,另外通过引入特定量可以实现Qf的显着改善 的MO,其中M是Ca和Sr的一种或两种。此外,通过将特定量的Na 2 O与MO(其中M是CA和Sr的一个或两个)一起引入,特别是在∈r的材料的情况下 > 150时,可以将τf控制在0附近,同时将Qf保持在高值。
摘要:
A dielectric ceramic composition for microwave use having a relative permittivity &egr;r of 35 to 45, Qf0 value of more than 50,000 GHz (at 7 GHz), and dielectric characteristic of &tgr;f=0±10 ppm/° C includes an La2O3.Al2O3.SrO.TiO2 based ceramic composition and a specific quantity of Ga2O3 to increase the Qf0 value and a specific amount of Pr2O3to control the &tgr;f value.
摘要翻译:包括相对介电常数ε为35至45,Qf0值大于50,000GHz(7GHz)的介电陶瓷组合物和tauf = 0±10ppm /℃的介电特性包括La 2 O 3·Al 2 O 3·S .TiO2基陶瓷组合物和一定量的Ga2O3以增加Qf0值和一定量的Pr2O3来控制tau值。
摘要:
A dielectric ceramic composition for electronic devices, which exhibits &tgr;f and ∈r characteristics equivalent or superior to those of the dielectric ceramic composition of the prior art, can inhibit the evaporation of Zn from the composition to thereby facilitate the control of makeup of the composition, can give homogeneous ceramics through short-time sintering more stably, is improved particularly in permittivity (Qf) and controllability of temperature characteristics, and permits downsizing of the dielectric elements. This composition is a solid solution of XBa(Zn⅓.Ta⅔)O3—Y(BaZ.Sr1−Z)(Ga½.Ta½)O3 which contains a specific trivalent metal ion and has a Zn content adjusted to a predetermined level, wherein part of Ta contained in the XBa(Zn⅓.Ta⅔)O3 moiety has been replaced by Nb. The composition is improved not only in permittivity by virtue of the above replacement but also in the degree of sintering by virtue of the above trivalent metal, i.e., Ga contained in the Y(BaZ.Sr1−Z)(Ga½.Ta½)O3 moiety, thus attaining the effects of improvement in permittivity and control of temperature characteristics simultaneously.
摘要:
The constitution comprises a grille for sucking air, a heat exchanger for exchanging heat with the air, a blower for feeding the air exchanged of heat by the heat exchanger, and an air diffuser for blowing out the wind generated by the blower. The air diffuser has such a shape that the direction of the wind blown out from both ends in a horizontal direction may be the lower direction than the direction of the wind blown out from the center in the horizontal direction. The air diffuser has such a shape that the outer circumference of the section in the horizontal direction has a nearly arc shape. It can be installed at a corner of mutually adjacent walls of a room or on a wall. In this constitution, the heat exchanged wind reaches uniformly all parts of the room, and the comfort is notably enhanced. At the same time, generation of unusual sound is suppressed.