摘要:
A sealed module includes a cold plate having a passage through which a cooling medium flows, a plurality of bellows structures having first ends which communicate with the passage in the cold plate to form a thermal conduction type cooling system and a plated printed circuit having a substrate and a plurality of integrated circuit elements provided on a first surface the substrate. The integrated circuit elements are in contact with ends of the bellows structures. A metal fitting secured on the cold plate has a flange disposed beneath the other surface of the substrate to present a junction between the second surface of the substrate and the flange of the metal fitting. A polyimide layer is formed on the surface of the substrate and a conductor layer is formed on the polyimide layer. The polyimide layer and the conductor layer are approximately ring shaped at least at the peripheral portions of the substrate. The flange of the metal fitting is fixed to the substrate by solder provided between the conductor layer and the flange, to thereby provide a seal between the substrate and the flange.
摘要:
A front-and-back electrically conductive substrate includes a plurality of posts composed of a material that can be anisotropically etched and having an electrically conductive portion that has at least a first surface and a second surface that communicate with each other, and an insulative substrate that supports the plurality of posts.
摘要:
The present invention provides a low-cost electrolytic capacitor wherein the deformation of the casing due to the thermal expansion during reflowing is prevented. An electrolytic capacitor of a surface mounting type having a capacitor element that consists of a dielectric film and an electrode foil, a metal casing that holds the capacitor element, and an electrolyte solution in which the capacitor element held in the casing is immersed, wherein the casing is equipped with a gas absorbing member that absorbs the gas generated in the casing.
摘要:
A mounted circuit substrate has at least one conductive layer. The side faces of a component mounting pad is formed on a surface of the substrate, and includes at least a columnar pattern made of a metal highly resistant to erosion by solder. The side faces of the component mounting pad are completely covered with an organic insulating layer. Therefore, the component mounting pad can withstand molten solder stresses accompanying component replacement even when component replacement is done many times.
摘要:
An electronic component includes a wiring substrate having a first surface and a second surface, an electronic component body mounted on a first surface side of the wiring substrate, an external electrode formed on a second surface side of the wiring substrate which is opposite to the first surface side, the external electrode being electrically connected to the electronic component body, a heat generating member having a conductive property and having a higher resistivity than the external electrode, and a heat insulating layer disposed between the electronic component body and the heat generating member, the heat insulating layer having an insulating property and being formed of a material different from an other material of the wiring substrate.
摘要:
The part information providing system includes a part information database a retrieving section, and a notifying section. The part information database stores part information including a price of a first part and identification information of a cheaper second part, serving as a substitute for the first part, in association with identification of the first part. The retrieving section retrieves identification information of a third part, which is a component of a device, from the database and, if the identification information of the third part is associated with that of the second part, retrieves the second part, which serves as a substitute for the third part and is cheaper than the third part, from the part using the identification information of the second part by following a link of the identification information of the second part. The notifying section notifies a user of information about the second part retrieved.
摘要:
A front-and-back electrically conductive substrate includes a plurality of posts composed of a material that can be anisotropically etched and having an electrically conductive portion that has at least a first surface and a second surface that communicate with each other, and an insulative substrate that supports the plurality of posts.
摘要:
The method comprises forming a plurality of wiring pattern layers on the front surface of a substrate. In the process of forming the wiring pattern layers, an insulator protection film keeps covering over the wiring pattern on the back surface of the substrate. When the formation of the wiring pattern layers has been completed on the front surface of the substrate, a penetrating hole is bored in the cured or hardened insulator protection film. The penetrating hole may be utilized as a conductive via or a conductive through hole. A wiring pattern layer is then formed over the hardened insulator protection film on the back surface of the substrate. It is possible to omit an additional process for removing the insulator protection film. The method contributes to further facilitation of production process and further reduction in production cost.
摘要:
A dummy pad is formed through a polyimide insulating layer so as to be provided opposite to a via connecting pad formed on the surface of a ceramic substrate. A defect occurring in the via connecting pad is filled with a protrusion when the dummy pad is formed. Accordingly, the influence of the defect upon a layer above the dummy pad is prevented. Further, in a method for manufacturing a thin film wiring board obtained by forming a thin film layer on a base substrate having a via that allows interlayer electric conduction, a void defect existing in the via is filled with a conductive material having corrosion resistance against an etchant, and then the thin film layer is formed on the base substrate.
摘要:
An electronic component includes a wiring substrate having a first surface and a second surface, an electronic component body mounted on a first surface side of the wiring substrate, an external electrode formed on a second surface side of the wiring substrate which is opposite to the first surface side, the external electrode being electrically connected to the electronic component body, a heat generating member having a conductive property and having a higher resistivity than the external electrode, and a heat insulating layer disposed between the electronic component body and the heat generating member, the heat insulating layer having an insulating property and being formed of a material different from an other material of the wiring substrate.