摘要:
An electronic component built-in module according to the present invention includes a pair of opposed circuit substrates, each of which includes a wiring pattern and an insulating base material containing a resin, an insulating layer that is placed between the pair of circuit substrates and contains an inorganic filler and a resin composition containing a thermosetting resin, an electronic component that is embedded in the insulating layer, and an inner via that is provided in the insulating layer so as to make an electrical connection between wiring patterns provided on different circuit substrates. A glass transition temperature Tg1 of the resin composition contained in the insulating layer and a glass transition temperature Tg2 of the insulating base material included in each of the circuit substrates satisfy a relationship Tg1>Tg2.
摘要:
A circuit component built-in module can be produced by filling a conducting material in through holes of a sheet-like member, stacking the sheet-like member and a metal foil on a circuit component package, and applying heat and pressure to embed the circuit component in the sheet-like member, and patterning the metal foil. The circuit component package includes a mounting member with substrate and wiring pattern and a circuit component. The circuit component includes a component body and external electrode, with the component body being thinner at a portion on which the external electrode is provided. The external electrode is provided on a surface of the circuit component that is opposed to the mounting member, and the component body is in contact with the mounting member.
摘要:
A miniature solid electrolytic capacitor is provided, which is suitable for being disposed within an electrically insulating layer, and is connected to a component using an electrically conductive adhesive with a connection resistance at an anode being low and with connection reliability being improved. Specifically, the electrolytic capacitor includes a valve metal element for an anode having a capacitor forming part and an electrode lead part, a dielectric oxide film formed on the valve element, a solid electrolyte layer formed on the dielectric oxide film and a charge collecting element for a cathode formed on the solid electrolyte layer, wherein at least one through hole is formed in the electrode lead part so as to expose a core of the valve metal element, and wherein an exposed portion of the core is used as a connecting portion.
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 transfer material capable of transferring a fine wiring pattern to a substrate reliably and easily. The transfer material includes at least three layers of a first metal layer as a carrier, a second metal layer that is transferred to the substrate as a wiring pattern, and a peel layer adhering the first and second metal layers releasably. On the surface portion of the first metal layer, a concave and convex portion corresponding to the wiring pattern is formed, and the peel layer and the second metal layer are formed on a region of the convex portions.
摘要:
A thermally conductive substrate includes a thermally conductive resin sheet member attached to a lead frame. The lead frame comprises a thermally conductive resin sheet member and it is integrated with the thermally conductive resin sheet member on the lead frame. The thermally conductive resin sheet member is formed from a thermosetting resin mixture comprises 70 to 90 parts by weight of an inorganic filler and 5 to 30 parts by weight of a thermosetting resin composition including a thermosetting resin, and the thermosetting resin is in a semi-cured state.
摘要:
A method for manufacturing a circuit board with high thermal dissipation includes the following steps: preparing a thermal conductive resin composition including 70 to 95 mass % of an inorganic filler and 5 to 30 mass % of a resin composition that includes a liquid thermosetting resin, a thermoplastic resin powder, and a latent curing agent; bonding the thermal conductive resin composition and a metal foil together by heating at a temperature lower than a temperature at which the thermosetting resin starts to cure while applying pressure so that the thermal conductive resin composition increases in viscosity and thus is solidified irreversibly; providing holes and curing the thermosetting resin to form an insulating substrate; and forming through holes and a circuit pattern. This method can achieve improved productivity and low cost in processing the holes. It is preferable that the thermal conductive resin composition is integral with a reinforcing material.
摘要:
A transfer material capable of transferring a fine wiring pattern to a substrate reliably and easily. The transfer material includes at least three layers of a first metal layer as a carrier, a second metal layer that is transferred to the substrate as a wiring pattern, and a peel layer adhering the first and second metal layers releasably. On the surface portion of the first metal layer, a concave and convex portion corresponding to the wiring pattern is formed, and the peel layer and the second metal layer are formed on a region of the convex portions.
摘要:
In a method of manufacturing a thermally conductive circuit board with high heat dissipation, high conductivity and high ground-connection, 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. The method provides that a part of a lead frame and heat sink are connected not only mechanically, but also electrically, and allows an associated power module size to be reduced and its density to be increased.
摘要:
By providing an end portion of a radiation plate located on and near an end portion of an insulator sheet, to which a lead frame extends, at a position away from the end portion of the insulator sheet inside of the insulator sheet in a plane direction of the insulator sheet, it is possible to secure a creeping distance between the lead frame and the radiation plate without decreasing a lead frame area on which components can be actually mounted.