Abstract:
A semiconductor device that meets the demand for realizing semiconductor chips in small sizes has connection lands (20) formed on an electrode terminal carrying surface of a semiconductor chip (10) which are electrically connected via a substrate (12) and solder bumps (26) to an external circuit. The connection lands (20) are electrically connected, through connection bumps (14), to connection pads (22) formed on one surface of the interposing substrate (12) of an insulating material so as to face the connection lands (20). Conductor wiring patterns (24) inclusive of the connection pads (22) are formed on one surface of the interposing substrate (12). Conductor wiring patterns (30) inclusive of terminal lands on which the external connection terminals (26) will be mounted, are formed on the other surface of the interposing substrate (12). Conductor wiring patterns (24) formed on the one surface of the interposing substrate (12) are connected to the conductor wiring patterns (30) formed on the other surface of the interposing substrate (12) through solid vias (32) formed by filling recesses with a metal by plating. The recesses are formed to penetrate through the insulating material of the interposing substrate (12) by laser machining and this permits the back surfaces of the conductor wiring patterns (24) on the side of the insulating material to be exposed on their bottom surfaces so that these can be used as electrodes during the metal plating process.
Abstract:
In a printed wiring board, an odd number (n) of conductive layers (11-13) and insulating layers (21-23) are alternately laminated upon another. The first conductive layer (11) is constituted as a parts connecting layer and the n-th conductive layer (13) is constituted as an external connecting layer which is connected to external connecting terminals (7). The second to (n-1)-th conductive layers (12) are constituted as current transmitting layers for transmitting internal currents. The surface of the n-th conductive layer (13) is coated with the outermost n-th insulating layer (23) in a state where the external connecting terminals (7) are exposed on the surface. It is preferable to constitute the internal insulating layers of a glass-cloth reinforced prepreg and the external insulating layers of a resin.
Abstract:
The invention concerns a chip card comprising a base body consisting of electrically insulating layers, the card bearing on one of its layers an open-loop antenna (6) having two ends, said body being provided with a cavity housing a micromodule (1) designed to be connected to said open-loop antenna by two terminals (31, 32), said micromodule comprising an electrically insulating support (2) bearing, on one first surface, a semiconductor component (3) and, on a second surface, several electric contact pads. The invention is characterised in that two contact pads (22, 23) are arranged in a strip passing through a central region of the support, said terminals being connected to said two contact pads respectively through said support, the two contact pads being connected to the antenna two ends respectively.
Abstract:
A substrate (50) is used for inspecting an electronic device (40) having bump-shaped connection terminals (42), and is used for an electrical test on the electronic device (40). The substrate includes opening sections (11), the diameter of which are determined so that a connection terminal (42) can be inserted into and drawn out from the opening (11), which are formed in a region on one side of an insulating substrate (10). The substrate (10) has an arrangement of connection terminals (20); and wiring patterns (14, 16) which corresponds to those of the electronic device (40). Each of the wiring patterns is composed of a pad section (16) exposed on a bottom face of the opening (11) so that the pad (16) can come into contact with the connection terminal (42) to accomplish electrical continuity, a connecting pad section (20) which is formed in a region outside of the region in which the pad section (16) is formed, and which comes into contact with a contact terminal (35) of an inspection device so as to accomplish electrical continuity, and a wiring section (14) for electrically connecting the pad section (16) with the connecting pad section (20). The wiring patterns (14, 16, 20) are formed on the other side of the insulating substrate (10).
Abstract:
Electronic assemblies comprising a sinterable composition are disclosed. The composition sinters reactively and/or non-reactively during the lamination cure cycle of the assembly. The composition generally comprises (i) at least one high melting particulate phase material, (ii) at least one low melting material, and (iii) an organic portion comprising a resin and a cross-linking agent.
Abstract:
The proposal is for a fitting unit for a multilayer hybrid circuit (5) with power components (10) which facilitates very good heat dissipation from its semiconductor power components (10). To this end, the multilayer hybrid circuit (5) is fitted on a heat conductive baseboard (1; 1a), where the baseboard (1) is a ceramic plate covered with copper foil (3) or a ceramic-coated copper foil.
Abstract:
Die Erfindung bezieht sich auf ein neuartiges Verfahren zum Herstellen eines Keramik-Metall-Substrates für elektrische Schaltkreise, bei dem auf eine Keramikschicht beidseitig eine erste bzw. zweite Metallisierung aufgebracht wird, und zwar eine erste Metallisierung in Form einer Kupferfolie unter Verwendung des DCB-Verfahrens.
Abstract:
Disclosed are a film carrier comprising an insulating layer (2') having laid therein an electrically conductive circuit such that the circuit is not exposed on the surface thereof, wherein conductive passages from the conductive circuit to one surface of the insulating layer (2') are formed in the insulating layer and via holes (3') from said conductive circuit to the other surface of the insulating layer (2') are formed and a semiconductor device prepared by mounting a semiconductor element (5) on the insulating layer (2') of the film carrier. The film carrier can sufficiently correspond to pitch-fining and high-density mounting of a semiconductor element wiring, can surely perform the connecting operation of inner lead bonding and outer lead bonding, and gives the mounting area of as small as possible.
Abstract:
Electronic assemblies comprising a sinterable composition are disclosed. The composition sinters reactively and/or non-reactively during the lamination cure cycle of the assembly. The composition generally comprises (i) at least one high melting particulate phase material, (ii) at least one low melting material, and (iii) an organic portion comprising a resin and a cross-linking agent.