Abstract:
A wiring board (lead frame) 10 has a configuration in which a high-frequency current suppression member 18 formed of a conductive soft magnetic film 18a having high magnetic permeability is provided in a near field (magnetic field dominant area) in a lead frame part (wiring part) 10a which can be a radiation noise source, preferably, in the periphery of the lead frame part 10a.
Abstract:
A an aspect of the present invention, a semiconductor device includes a lead frame having a lower base structure of oxygen free copper or copper-based alloy and having terminals; a semiconductor chip connected with the terminals of the lead frame; and a mold resin configured to cover the semiconductor chip. The lead frame has an exposed portion from the mold resin, and the exposed portion includes a diffusion prevention film formed on or above the lower base structure of the lead frame; and a Sn-Bi (tin-bismuth) film formed on the diffusion prevention film.
Abstract:
Eine Schmelzsicherung für Leiterplattenmontage besitzt Anschlüsse, die mit Leiterbahnen auf der Leiterplatte elektrisch verbindbar sind, sowie mindestens eine leitfähige und schmelzbare Verbindung zwischen den Anschlüssen. Sie ist so gestaltet, dass sie kostengünstig einstückig aus Blech oder leitfähigem Kunststoff gefertigt werden kann.
Abstract:
A Pb-free solder-connected structure having a sufficiently large connection strength, featuring an interface that remains stable even after the passage of time, and maintaining sufficient wettability and resistance against whiskers, and an electronic device. Specifically, a Pb-free solder, characterized in that an Sn-Ag-Bi solder which is a representative Pb-free solder is connected to an electrode that has an Sn-Bi layer formed on the surface thereof. Bi concentration in the Sb-Bi layer is preferably 1 to 20 % by weight to obtain a sufficient degree of wettability. When a more reliable joint is required, the Cu layer is formed under the Sn-Bi layer to obtain a connection portion having a sufficiently large interfacial strength.
Abstract:
A board-mount electrical connector (10) capable of maintaining favorable solderability of a connecting section (12e) of a terminal (12) over a long period, and preventing occurrence of a whisker in or on a bent section (12d) of the terminal (12) is provided. The electrical connector (10) includes a plurality of terminals (12) each having at one end a contact section (12b) which contacts a mating contact and having at the other end a connecting section (12e) which connects to a circuit board (20), and each having a bent section (12d) in a middle portion between the contact section (12b) and the connecting section (12e), and an insulating housing (11) which holds the plurality of terminals, and each terminal (12) has a bright tin-plated layer (12f) and a semi-bright tin plated layer (12g) formed on respective surfaces of the contact section (12b) and the connecting section (12e)such that the semi-bright tin-plated layer (12g) is thicker than the bright tin-plated layer (12f). The surface of the middle portion is not tin-plated.
Abstract:
A method of burning-in semiconductor devices, comprising permanently mounting a plurality of resilient contact structures on a plurality of unsingulated semiconductor devices on a semiconductor wafer; powering up at least a portion of the unsingulated semiconductor devices by making pressure connections to the resilient contact structures on the portion of the unsingulated semiconductor devices; and heating the semiconductor devices to a temperature of at least 150° C for less than 60 minutes.
Abstract:
The objectives of the present invention include to mount an electric contact or an electric connector on a printed circuit board without conducting the soldering work, and to make mounting the electric contact on a printed circuit board by an automatic machine even when the electric contact is microminiaturized. The electric contact (100) using resin solder according to the present invention is connected to a printed circuit board (400), which has a conductor (410) being provided on a surface thereof. This electric contact (100) comprises a leg (110), which contacts the conductor (410) of the printed circuit board (400), and a connecting part (120), which is connected to the conductor of the counterpart member. At least a part of the leg (110), which contacts the conductor (410) of the printed circuit board (400), is made of a lead-free ultrahigh-conductive plastic being a conductive resin composite. The electric connector (C) comprises the electric contact (100) and an insulating housing (300), which holds the electric contact (100) so that the part of the leg (110), which contacts the conductor (410) of the printed circuit board (400), is exposed.
Abstract:
A probe card (321) is provided for contacting an electronic component with raised contact elements. In particular, the present invention is useful for contacting a semiconductor wafer (310) with resilient contact elements (301), such as springs. A probe card (321) is designed to have terminals to mate with the contact elements on the wafer (310). In a preferred embodiment, the terminals are posts. In a preferred embodiment the terminals include a contact material suitable for repeated contacts. In one particularly preferred embodiment, a space transformer (324) is prepared with contact posts on one side and terminals on the opposing side. An interposer (325) with spring contacts (333, 334) connects a contact (335) on the opposing side of the space transformer (324) to a corresponding terminal (332) on a probe card (321), which terminal (332) is in turn connected to a terminal (331) which is connectable to a test device such as a conventional tester.
Abstract:
An interconnection contact structure assembly including an electronic component (102) having a surface and a conductive contact terminal (103) carried by the electronic component (102) and accessible at the surface. The contact structure (101) includes an internal flexible elongate member (106) having first (107) and second ends (108) and with the first end (107) forming a first intimate bond to the surface of the conductive contact terminal (103) without the use of a separate bonding material. An electrically conductive shell (116) is provided and is formed of at least one layer of a conductive material enveloping the elongate member (106) and forming a second intimate bond with at least a portion of the conductive contact terminal immediately adjacent the first intimate bond.