Abstract:
A metal alloy composite comprising a phase of a highly-conductive base metal in the from of a matrix and a phase of another metal positioned within the matrix, the base metal being present in a major amount and the other metal being present in a minor amount, the metal alloy composite being capable of being formed into a very thin wire for use in a semiconductor application which includes a terminal assembly comprising an electrically conductive terminal in conductive contact with a conductive member and another electrically conductive terminal in conductive contact with a semiconductor, said terminals being joined by said alloy composite wire, examples of the base metal being gold, copper, and aluminum.
Abstract:
The invention is related to a bonding wire having a yield strength in the range of 50 to 120 MPa, the bonding wire comprising: a core (2) with a surface, wherein the core (2) comprises copper as a main component, wherein an average size of crystal grains in the core (2) is between 2.5 µm and 30 µm, and wherein the wire core (2) contains silver in an amount between 45 and 900 weight-ppm.
Abstract:
The invention is related to a bonding wire having a yield strength in the range of 50 to 120 MPa, the bonding wire comprising: a core (2) with a surface, wherein the core (2) comprises copper as a main component, wherein an average size of crystal grains in the core (2) is between 2.5 µm and 30 µm, and wherein the wire core (2) contains palladium in an amount between 0.5 and 3 weight-%.
Abstract:
The invention is related to a bonding wire, comprising a core with a surface, wherein the core comprises copper as a main component, wherein the core comprises copper as a main component, wherein an average size of crystal grains in the core is between 2.5 µm and 30 µm, and wherein a yield strength of the bonding wire is less than 120 MPa.
Abstract:
The invention relates to a ribbon, preferably a bonding ribbon for bonding in microelectronics, comprising a first layer comprising copper with a surface and at least a coating layer superimposed over the surface of the first layer, wherein the coating layer comprises aluminium, and an intermediate layer, wherein in a cross-sectional view of the ribbon the area share of the first layer is in the range of from 50 to 96 %, based on the total area of the cross-section of the ribbon, wherein the aspect ratio between the width and the height of the ribbon in a cross-sectional view is in the range of from 0.03 to less than 0.8, wherein the ribbon has a cross-sectional area in the range of from 25'000 µm 2 to 800'000 µm 2 , wherein the intermediate layer is arranged between the first layer and the coating layer, wherein the intermediate layer comprises at least one intermetallic phase comprising material of the first layer and material of the coating layer. The invention further relates to a process for making a wire, to a wire obtainable by said process, to an electric device comprising at least two elements and at least aforementioned wire, to a propelled device comprising said electric device and to a process of connecting two elements through aforementioned wire by wedge-bonding.
Abstract:
Die Erfindung beschreibt eine leistungselektronische Verbindungseinrichtung mit einer ersten (120) und einer zweiten (220) voneinander elektrisch isolierten Kontaktfläche, mit jeweils mindestens einem einer Edelmetalloberfläche (160,260) aufweisenden Kontaktbereich (16,26) auf diesen Kontaktflächen, je einer auf den Kontaktbereichen angeordneten Sintermetallschicht (18,28) und einem flexiblen Verbindungselement (4). Hierbei weist dieses Verbindungselement eigene dritte (40) und vierte (42) Kontaktbereiche mit jeweils einer Edelmetalloberfläche auf. Ebenso sind diese dritten und vierten Kontaktbereiche mit den Sintermetallschichten der ersten und zweiten Kontaktflächen elektrisch leitend verbunden. Die erste Kontaktfläche (120) kann auf einer Metallisierung (14) eines Substrats angeordnet sein une die zweite Kontaktfläche (220) kann auf einem Leistungshalbleiterbauelement (1) angeordnet sein.
Abstract:
[Issues to be solved] Second bonding failures caused attached oxide of additive elements on high purity Au bonding wire are to be dissolved. [Solution means] Au alloy bonding wires comprising: 0.01 - 1.2 wt % Pd, 5 - 100 wt ppm Mg, 5 - 20 wt ppm In, 5 - 20 wt ppm Al, 5 - 20 wt ppm Yb, optionally 5 - 20 wt ppm Ca and/or at least more than one element among 5 - 20 wt ppm La, 5 - 20 wt ppm Lu, 5 - 100 wt ppm Sn, 5 - 100 wt ppm Sr,
the rest being Au having a purity greater than 99.99 wt %. Bonding wire, which contains these trace additive elements do not cause of disturbance by accumulated contamination, because of contamination, which formed at ball formation by micro discharge and at the first bonding to attached on tip of capillary, transferring to the wire at second bonding.
Abstract:
A corrosion tolerant bonding pad for a semiconductor device includes an interconnect (12) formed on the substrate (10) of the semiconductor device, a passivating layer (16) provided on the interconnect, the passivating layer having an aperture for exposing an enlarged bonding region of the interconnect, a barrier layer (28) provided on the exposed enlarged bonding area of the interconnect (12) and on portions of the passivating layer (16) surrounding the bonding area, and a bonding layer (30) provided on the barrier layer (28). The barrier layer is a non-corrosive, conductive material, for example, a compound of titanium and tungsten (TiW -- known as ti-tungsten).