摘要:
A bonding structure of a ball-bonded portion is obtained by bonding a ball portion formed on a front end of a multilayer copper bonding wire. The multilayer copper bonding wire includes a core member that is mainly composed of copper, and an outer layer that is formed on the core member and is mainly composed of at least one noble metal selected from a group of Pd, Au, Ag and Pt. Further, a first concentrated portion of such noble metal(s) is formed in a ball-root region located at a boundary with the copper bonding wire in a surface region of the ball-bonded portion.
摘要:
There is provided a bonding wire which does not cause a leaning failure or the like. A semiconductor mounting bonding wire has a breaking elongation of 7 to 20%, and stress at 1% elongation is greater than or equal to 90% of a tensile strength and is less than or equal to 100% thereof.
摘要:
The invention is aimed at providing a bonding structure of a copper-based bonding wire, realizing low material cost, high productivity in a continuous bonding in reverse bonding for wedge bonding on bumps, as well as excellent reliability in high-temperature heating, thermal cycle test, reflow test, HAST test or the like. The bonding structure is for connecting the bonding wire onto a ball bump formed on an electrode of a semiconductor device, the bonding wire and the ball bump respectively containing copper as a major component thereof. The bonding structure comprises a concentrated layer A provided at an interface of a bonding part of the ball bump and the bonding wire, wherein the concentration of a metal R other than copper in the concentrated layer A is not less than ten times the average concentration of the metal R in the ball bump; and a concentrated layer B provided at an interface of a bonding part of the ball bump and the electrode, wherein the concentration of the metal R in the concentrated layer B is not less than ten times the average concentration of the metal R in the ball bump.
摘要:
A bonding structure and a copper bonding wire for semiconductor device include a ball-bonded portion formed by bonding to the aluminum electrode a ball formed on a front end of the copper bonding wire. After being heated at any temperature between 130° C. and 200° C., the ball-bonded portion exhibits a relative compound ratio R1 of 40-100%, the relative compound ratio R1 being a ratio of a thickness of a Cu—Al intermetallic compound to thicknesses of intermetallic compounds that are composed of Cu and Al and formed on a cross-sectional surface of the ball-bonded portion.
摘要:
There is provided a bonding wire which does not cause a leaning failure or the like. A semiconductor mounting bonding wire has a breaking elongation of 7 to 20%, and stress at 1% elongation is greater than or equal to 90% of a tensile strength and is less than or equal to 100% thereof.
摘要:
An electromagnetic linear-motion device in which a field magnet unit mounted on a movable unit slidably supported on elongated guide members is movable longitudinally between and along a pair of spaced parallel stationary linear armatures so that any objectionable forces producing increased frictional forces between the movable unit and the guide members are cancelled by each other.
摘要:
It is an object of the present invention to provide a bonding structure and a copper bonding wire for semiconductor that are realizable at an inexpensive material cost, superior in a long-term reliability of a bonded portion bonded to an Al electrode, and suitable for use in a vehicle-mounted LSI. A ball-bonded portion is formed by bonding to the aluminum electrode a ball formed on a front end of the copper bonding wire. After being heated at any temperature between 130° C. and 200° C., the aforementioned ball-bonded portion exhibits a relative compound ratio R1 of 40-100%, the relative compound ratio R1 being a ratio of a thickness of a Cu—Al intermetallic compound to thicknesses of intermetallic compounds that are composed of Cu and Al and formed on a cross-sectional surface of the ball-bonded portion.
摘要:
A dual drive system for an automatic record player of a type in which programmed music selection can be carried out. The drive system includes a mechanical first drive system for mechanically driving the pickup arm and an electromagnetic second drive system for driving the pickup arm using an electromagnetic force. Circuitry is provided for selecting between the two drive systems in accordance with the selected operational mode of the player or the position of the pickup arm.
摘要:
The invention is aimed at providing a bonding structure of a copper-based bonding wire, realizing low material cost, high productivity in a continuous bonding in reverse bonding for wedge bonding on bumps, as well as excellent reliability in high-temperature heating, thermal cycle test, reflow test, HAST test or the like. The bonding structure is for connecting the bonding wire onto a ball bump formed on an electrode of a semiconductor device, the bonding wire and the ball bump respectively containing copper as a major component thereof. The bonding structure comprises a concentrated layer A provided at an interface of a bonding part of the ball bump and the bonding wire, wherein the concentration of a metal R other than copper in the concentrated layer A is not less than ten times the average concentration of the metal R in the ball bump; and a concentrated layer B provided at an interface of a bonding part of the ball bump and the electrode, wherein the concentration of the metal R in the concentrated layer B is not less than ten times the average concentration of the metal R in the ball bump.
摘要:
A bonding structure of a ball-bonded portion is obtained by bonding a ball portion formed on a front end of a multilayer copper bonding wire. The multilayer copper bonding wire includes a core member that is mainly composed of copper, and an outer layer that is formed on the core member and is mainly composed of at least one noble metal selected from a group of Pd, Au, Ag and Pt. Further, a first concentrated portion of such noble metal(s) is formed in a ball-root region located at a boundary with the copper bonding wire in a surface region of the ball-bonded portion.