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:
Provided is a printed wiring board for a chip size scale package, which overcomes the poor adhesion of solder balls to a base material which poor adhesion is caused by a recent decrease in the size of the solder balls, and in the chip size scale package, the distortion of the printed wiring board is decreased and the distortion of a semiconductor plastic package formed by mounting a semiconductor chip on the printed wiring board by wire bonding or flip chip bonding is decreased. The printed wiring board has, as a substrate for a chip scale package, a double-side copper-clad laminate formed of an insulation layer and having copper foils on both surfaces, wherein the double-side copper-clad laminate has an upper copper foil surface and a lower copper foil surface,
the upper copper foil surface has a wire bonding or flip chip bonding terminal and has a copper pad in a position where the copper pad can be electrically connected to said wire bonding or flip chip bonding terminal and can be connected to a blind via hole formed in the lower copper surface, the lower copper foil surface has a solder-balls-fixing pad in a position corresponding to said copper pad, the solder-balls-fixing pad has at least 2 blind via holes within itself, and the solder-balls-fixing pad connected to a reverse surface of the copper pad with a conductive material is electrically connected with solder balls which are melted and filled in blind via holes so as to be mounded.
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:
A board for mounting electronic circuit parts includes a first connection terminal group including a plurality of connection terminals densely formed on the top surface of a substrate having through holes formed therein, and a second connection terminal group including a plurality of connection terminals formed at at least the peripheral portion of a back surface of the substrate. The first connection terminal group is connected to the second connection terminal group by way of the through holes. A build-up multilayer interconnection layer having via holes is formed on the top surface of the substrate, so that the first connection terminal group is connected to the second connection terminal group through the build-up multilayer interconnection layer and the through holes. According to another aspect, each signal line on the top surface of the build-up multilayer interconnection layer comprises a plurality of wiring patterns having different widths and a taper-shaped pattern that connects those wiring patterns together and whose width continuously changes. Each signal line has a smaller width at an area having a relatively high wiring density than at an area having a relatively low wiring density.
Abstract:
A plug-in type electronic control unit is comprised of a wiring board, a plurality of electronic parts mounted on one surface of the wiring board by utilizing a wireless bonding process, and a plug member mounted on the other surface of the wiring board by utilizing a wireless bonding process. It is possible to suppress the planar extent of the unit by such a laminated structure, and to suppress the extent of the unit in a laminating direction by the employment of the wireless bonding process. Thus, it is possible to achieve a reduction in size of the plug-in type electronic control unit.
Abstract:
A multilayer printed circuit board comprises a core substrate, multilayer wiring layers formed thereon and a solder pad group formed by two-dimensionally arranging pads provided with solder bumps on the surface of the multilayer wiring layer, in which the solder pads of the solder pad group are arranged in only a peripheral portion other than a central portion to form a frame shape and the solder pads located at the outside part among the frame-shaped solder pad group are constructed with flat pads each connected to conductor pattern on their surface and solder bumps formed on the surfaces of the flat pads, while the solder pads located at the inside part are constructed with viaholes each connected to an innerlayer flat pad group located in an innerlayer and solder bumps formed in recess portions of these viaholes.
Abstract:
A semiconductor die package (30) includes a plurality of conductive leads (11) and a multi-layer structure (10) for carrying electrical signals, the multi-layer structure (10) including a plurality of layers of insulative material (12a-12d), each of the layers including a first surface and a second surface on an opposing side of the layer. Each of the leads (11) extends into a corresponding well (15) extending completely through at least one of the layers and bottoming at one of the surfaces of one of the layers through which the well (15) does not extend and is electrically coupled to an electrically conductive bonding structure (13) formed within its corresponding well (15).