Abstract:
A microelectronic substrate (110) having a plurality of alternating substantially planar layers of dielectric material (102) and conductive material (104), and further having a first surface (116) and a second surface (130), wherein the dielectric material (102) and the conductive material (104) layers extend substantially perpendicularly between the first and second surfaces (116, 130).
Abstract:
A mounting substrate (10) including an interconnection (12) provided on a front surface of a substrate, a lead pad (24) provided separately from the interconnection (12), on the front surface of the substrate (10) and, a lead (20) connected to the lead pad (24) by solder (22), and a connecting portion (28) that connects the interconnection (12) and the lead pad (24) after the lead (20) is connected.
Abstract:
There are disclosed printed board (5) on which electronic parts are mounted, a method for manufacturing the printed board, and a structure for connecting conductor elements (8, 8') to this printed board. The printed board includes an insulating supporting substrate (50) and at least one metallic terminal (53, 54). The supporting substrate is provided with at least one opening (51, 52) through the substrate, and the metallic terminal is fixed to the supporting substrate without protruding from the supporting substrate and bridges the opening.
Abstract:
The present invention relates to mounting an electric connector (20) onto a printed circuit board, particularly to a printed circuit board comprised of ceramic material, for instance either an LTCC substrate or an HTCC substrate. The problem addressed is one where the connector (20) tends to loosen from the substrate when the temperature varies. This is due to the difference in the coefficients of thermal expansion of the printed circuit board and the connector (20). The problem is solved with the aid of a so-called shim (10) that has a coefficient of thermal expansion between that of the printed circuit board and that of the connector. One side of the shim (10) is soldered onto the connector and the other side of the shim is soldered onto the printed circuit board. The connector (20) is therewith fastened to the printed circuit board. Shear stresses acting between the connector (20) and the printed circuit board are distributed through said board through the medium of two joints instead of one. The connector may alternatively be provided with a built-in shim.
Abstract:
A lead-free solder paste printing method is practiced with use of a metal mask having two openings which are circular or elliptical in shape by placing the metal mask (1) on a circuit board (2) having an electrode (21) formed in a predetermined pattern to join an end portion of a lead member (6), and moving a printing squeegee along the upper surface of the metal mask (1) to thereby print a lead-free solder paste on the surface of the electrode (21) on the circuit board (2). The method produces on the electrode (21) of the circuit board (2) two lead-free solder paste patterns (30a,30a) each circular or elliptical in shape and arranged in a direction in which the lead member (6) is to extend from the electrode.
Abstract:
The invention relates to a method for connecting two film cable ends. A metal strip (4), which is tin-plated with a solder, is placed transversally across the conductor strips (2) between the two film cable ends (1), the latter are pressed together with the interposed tin-plated metal strip, the metal strip is supplied with current and heated until the solder of the metal strip melts and fuses with the conductor strips of the film cable. Once the solder connection has been made, the metal strip is severed in the intermediate spaces between two neighbouring conductor strips.
Abstract:
A thermocurable electroconductive adhesive sheet which is able to make an electric connection having mechanical, thermal and electric stability, and low resistance, produced by a simple and easy process is provided.
Abstract:
When an adhesive is applied on a metallic wiring, the metal forming the metallic wiring film dissolutes as ions into the adhesive with time. If the adhesive is based on a polyester resin and placed in an environment of high temperature or high temperature and high humidity, adhesion and insulation are deteriorated by the free metallic ions. However, adhesives of the present invention contain a cation scavenger to scavenge the free metallic ions in the adhesives. Thus, highly durable flat cables can be obtained. Thus, flat cables with reduced loss in adhesive strength and insulation are provided.
Abstract:
Bei einer derartigen Sensoranordnung, beispielsweise zur Abtastung einer Meßteilung bei einer Positionsmeßeinrichtung, weist ein Substrat (2) die Sensoren (5) und in integrierter Form mit diesen Sensoren (5) elektrisch verbundene Leiterbahnen (6) eines ersten Teils eines elektrischen Verbindungselements (7) auf. Diese Leiterbahnen (6) überragen das Substrat (2) in einen zweiten Teil des elektrischen Verbindungselements (7) freitragend und werden an ihren freien Enden (13) mit Kontaktstellen einer Leiterplatte durch Lötung verbunden.