Abstract:
A thick film circuit with a perimeter anchored thick film pad is provided. The thick film circuit includes a base substrate, a thick film bonding pad, and a solder mask layer. The thick film bonding pad is formed on the surface of the base substrate. The solder mask layer is also formed on the surface of the base substrate, and overlaps a portion of the thick film bonding pad in order to improve adhesion between the thick film bonding pad and the base substrate.
Abstract:
A flexible printed wiring board constructed by using elemental pieces at a low cost. The elemental pieces 81a to 81c according to the present invention are provided respectively with supporting films 24a to 24c on one face and adhesive resin films 19a to 19c on the other face. The supporting films 24a to 24c have connecting openings on the bottom face of which the surface of metal wiring circuits are exposed as lands 23a to 23c. On the other hand, conductive bumps 16a to 16c, which are connected respectively to the metal wiring circuits 14a to 14c, project on the resin films 19a to 19c. To construct a flexible printed wiring board 83 by using plural elemental pieces 81a to 81c, the tips of the conductive bumps 16b and 16c are brought into contact respectively with the lands 23a and 23b on the bottom face of the openings and contact-bonded under heating. Thus, the elemental pieces 81a to 81c are adhered to each other owing to the adhesiveness of the resin film 19b and 19c. The connection among the elemental pieces 81a to 81c can be further enhanced by surface-roughing the supporting films 24a to 24c.
Abstract:
A flexible printed wiring board constructed by using elemental pieces at a low cost. The elemental pieces 81a to 81c according to the present invention are provided respectively with supporting films 24a to 24c on one face and adhesive resin films 19a to 19c on the other face. The supporting films 24a to 24c have connecting openings on the bottom face of which the surface of metal wiring circuits are exposed as lands 23a to 23c. On the other hand, conductive bumps 16a to 16c, which are connected respectively to the metal wiring circuits 14a to 14c, project on the resin films 19a to 19c. To construct a flexible printed wiring board 83 by using plural elemental pieces 81a to 81c, the tips of the conductive bumps 16b and 16c are brought into contact respectively with the lands 23a and 23b on the bottom face of the openings and contact-bonded under heating. Thus, the elemental pieces 81a to 81c are adhered to each other owing to the adhesiveness of the resin film 19b and 19c. The connection among the elemental pieces 81a to 81c can be further enhanced by surface-roughing the supporting films 24a to 24c.
Abstract:
A semiconductor device si so configured that the circuit patterns formed on both sides of a copper-clad double-sided laminated board are connected to each other by through holes, and IC chips are mounted on the front side, and further, external-connection terminals are provided on the reverse side. In this semiconductor device, the connection terminals are copper core bumps on the land parts of the through holes which are made in diebond patterns. A method of manufacturing semiconductor devices in which copper core bumps are formed on circuit patterns formed on a circuit board, by plating using resist patterns. In this manufacturing method, the parts, where the bumps are to be formed, of the circuit patterns formed by the resist patterns are treated by the same kind of pattern etching as the one used for forming the circuit patterns.
Abstract:
An insulation displacement contact (10) comprises first and second contact portions each of which comprises a cantilevered split beam (19). The upper split beam, which receives insulated wires, comprises a pair of tynes (20,22) which are folded about the axis of a slot (25) separating the tynes such that the internal angle between the tynes is approximately 90°. The width of the tynes is larger than that of prior art devices resulting in increased stiffness and the length of the tynes is sufficiently long to receive two wires therebetween. The contacts (10) are mounted in a housing which includes a plurality of teeth (90) provided with means for retaining lugs (32,34) on the end of the tynes to ensure bowed opening of the tynes on insertion of a wire. The contacts are arranged along the central axis (72) of the housing such that the folded tynes of alternate contacts extend on opposite sides of the central axis.
Abstract:
Un système de connexions électriques, par exemple un tableau de connexions à face rabattables, comporte un profilé de support (12) recevant des premiers connecteurs (14) dont les contacts sont orientés vers l'extérieur du profilé (12). Un câble introduit entre le profilé et les connecteurs se divise en conducteurs individuels aboutissant à des contacts (34, 36) via des fentes (30) dans les parois du profilé. Un second connecteur (16) porte des prises de communications vocales ou de données classiques (19) qui sont reliées aux premiers connecteurs par l'intermédiaire de cartes de circuits imprimés (38) qui s'enfichent dans des fentes (40) des premiers connecteurs. Les connecteurs plats des cartes ont une discontinuité sur une surface, et une moitié du contact est reliée au contact sur l'autre face pour permettre une connexion directe entre les rangées de contacts supérieures (34) et inférieures (36) des premiers connecteurs dans une première position des seconds connecteurs, et permettre également un contact entre les rangées de contacts supérieures et inférieures et les prises classiques (19) dans une seconde position.
Abstract:
[Object] To provide a printed circuit board having electronic component functions buried in a substrate laminate. [Constitution] Holes of an inner substrate 2 are filled with a dielectric paste 6 and a resistor paste 7. These pastes are sealed with a plating layer 13. Thus, the functions of a capacitor and a resistor are buried in the inner substrate 2. Outer substrates 2, 3 are laminated to the inner substrate 2, and holes of the outer substrates 2, 3 are filled with a dielectric paste 6a and a resistor paste 7a, followed by sealing of these pastes with a plating layer 17. Thus, the functions of a capacitor and a resistor are buried in the outer substrates 2, 3. Therefore, the multilayer printed circuit board of the present invention has electronic component functions buried therein.
Abstract:
A semiconductor element package (P) and a semiconductor element package mounting distributing circuit basic plate, wherein the shield metallic layer (60) is provided on the flexible insulating basic plate for constituting the package, so that the semiconductor element (30) mounted on the flexible insulating basic plate (10) may be kept electromagnetically shielded positively with the shield metallic layer, whereby troublesome operation such as mounting the bulk high box shaped electromagnetic shield member on the outside of the semiconductor element package mounted on the distributing circuit basic plate as in the conventional one is not required, and, also, since the shield metallic layer is provided on the face, which is not formed with the lead patterns, of the flexible insulating basic plate, no influences are applied at all upon the construction of the land pattern and the mounting construction of the semiconductor element.
Abstract:
Microelectric chips are electrically connected to underlying substrates by means of elongated solder columns made possible by solder dams at the surface of the substrate, the dams being positioned about at least a portion of the connection pads on the surface. Substantial increases in the size of the matrix of such columns are achieved without exceeding applicable shear strain limits, due to the increased deformation of the connectors made possible by their increased length.