摘要:
A connection member can be produced without a via-forming step. The connection member includes an insulating substrate which has an upper surface, a lower surface opposed to the upper surface, and a side surface which connects these surfaces; and at least one wiring which extends from the upper surface to the lower surface through the side surface.
摘要:
[Problem] To provide a flip-chip mounting method and a bump formation method applicable to flip-chip mounting of a next generation LSI and having high productivity and high reliability. [Means for Solving Problem] A semiconductor chip 20 having a plurality of electrode terminals 12 is held to oppose a circuit board 21 having a plurality of connection terminals 11 with a given gap provided therebetween, and the semiconductor chip 20 and the circuit board 21 in this state are dipped in a dipping bath 40 containing a melted resin 14 including melted solder particles for a given period of time. In this dipping process, the melted solder particles self-assemble between the connection terminals 11 of the circuit board 21 and the electrode terminals 12 of the semiconductor chip 20, so as to form connectors 22 between these terminals. Thereafter, the semiconductor chip 20 and the circuit board 21 are taken out of the dipping bath 40, and the melted resin 14 having permeated into the gap between the semiconductor chip 20 and the circuit board 21 is cured, so as to complete a flip-chip mounting body.
摘要:
A ball-point pen, wherein a cover member (6) is fitted to a joint member (3) connecting a writing tip (1) rotatably supporting a writing ball (2) at the tip thereof to an ink storage tube. When the cover member (6) is fitted to the joint member (3) along the outer peripheral surface thereof, a part of the cover member does not come within 0.2 mm (within the range of the chain double-dashed line) from around the writing tip. Thus, even if the accuracies of parts and assembly machines are dispersed, a problem with an existing ball-point pen wherein a cover member is brought into contact with a writing tip and the writing tip is damaged in an assembly step can be avoided.
摘要:
A plurality of electromagnetic wave areas is provided to form a data channel between a wireless IC chip and a main antenna. The plurality of electromagnetic wave areas is placed along a traveling direction of the wireless IC chip, and comprises an electromagnetic wave area at a first stage in which an electromagnetic wave is radiated from front of a traveling direction of the wireless IC chip, an electromagnetic wave area at a middle stage in which an electromagnetic wave is radiated in a direction intersecting with a traveling direction of the wireless IC chip, and an electromagnetic wave area at a last stage in which an electromagnetic wave is radiated from a rear of a traveling direction of the wireless IC chip.
摘要:
A wireless communication system includes: wireless IC chips used for identifying objects; a transceiver for transmitting and receiving information to/from the wireless IC chips by radio waves; and a radio wave direction unit for directing the traveling directions of the radio waves from the transceiver toward the wireless IC chips. The radio wave direction unit is arranged such that the radio wave reflecting surface can be developed to face a collection space where the wireless IC chips are collected. A part of the radio waves radiated from the transceiver travels stereoscopically toward the collection space S by an action of the radio wave reflecting surface.
摘要:
In a module including circuit elements, a plurality of wires, which are generally two-dimensionally formed, are multi-layered via electrically insulating material, which comprises a mixture including at least filler and electrically insulating resin. One or more circuit elements are electrically connected to the wires, and at least a part of those circuit elements is embedded in the electrically insulating material. The module further includes a heat sink member that has a higher thermal conductivity than the electrically insulating material, and that, when viewed from the direction of multi-layering the wires, overlaps with a circuit element, which is one of those circuit elements, exhibiting the highest temperature rise at least in the module.
摘要:
A sheet-like thermally conductive resin composition containing 70 to 95 wt. % inorganic filler and 5 to 30 wt. % thermosetting resin composition, a lead frame as a wiring pattern, and an electrically conductive heat sink with a metal pole placed therein are superposed, heated and compressed, and thus are combined to form one body. Consequently, a thermally conductive circuit board with a flat surface is obtained in which a grounding pattern is grounded to the heat sink inside the insulating layer. Thus, the grounding pattern and the heat sink can be connected electrically with each other in an arbitrary position inside the insulating layer of the thermally conductive circuit board. Accordingly, there are provided a thermally conductive circuit board with high heat dissipation, high conductivity and high ground-connection reliability, a method of manufacturing the same, and a power module allowing its size to be reduced and its density to be increased.
摘要:
A lead frame of a circuit board is punched in a direction opposite to a heat sink plate. Even if burrs are produced due to the punching, the burrs do not penetrate a sheet or short-circuit to the heat sink plate. A resist film tightly contacts on the periphery of a land of the lead frame of the circuit board, and a plated layer tightly contacts on the land. This prevents electronic components from defective mounting on the land.
摘要:
In a power module, a wiring substrate to which a heat generating component is connected electrically and a heat sink are connected through the medium of a thermally conductive and electrically insulating member. The thermally conductive and electrically insulating member is a curable composition containing (A) a thermosetting resin, (B) a thermoplastic resin, (C) a latent curing agent, and (D) an inorganic filler. The thermally conductive and electrically insulating member is bonded to the heat generating component in such a manner as to be deformed complementarily to unevenness in shape and height of the heat generating component. Heat generated from the heat generating component is radiated by means of the heat sink. Thus, a power module that allows heat generated from an electronic component to be radiated evenly and efficiently and achieves high-density mounting, and a method of manufacturing the power module are provided.
摘要:
A stamp and a process of producing a stamp includes a stamp that is made from a sponge having open cells to allow repeated impressing operations without supplying stamp ink for a long time. The process includes fitting a heat-fusing ink sheet or a heat-generating plate, which contains a heat-generating material, over the surface of a stamp-piece that has open cells therein. A liquid substance soaks a manuscript having characters, patterns, etc., which are represented by non-applied areas of recording material. The manuscript is placed over the top in such a manner that an image may appear to be a mirror image. The manuscript is irradiated from above with light to cause light to pass through the non-applied areas of recording material to increase the temperature of the heat-generating material at sites corresponding to the non-applied areas of recording material. The generated heat of the heat-generating material corresponding to the non-applied portion of recording material fuses that part of the surface of the stamp-piece, thereby forming non-oozing areas of stamp ink while the stamp surface portion corresponding to the applied areas of recording material is not fused, thus forming oozing areas of stamp ink.