Abstract: A flexible conductive ribbon is ultrasonically bonded to the surface of a die and terminals from a lead frame of a package. Multiple ribbons and/or multiple bonded areas provide various benefits, such as high current capability, reduced spreading resistance, reliable bonds due to large contact areas, lower cost and higher throughput due to less areas to bond and test.

Abstract: An ultrasonic bond is formed using a bond tool foot having a waffle shape of thin protrusions and gaps between the protrusions. The tool is brought in contact with the ribbon to a depth to create depressions in a ribbon approximately 150 ?m or less from the underlying bonding surface. The tool is then brought down further into the ribbon to contact the portions of the ribbon between the depressions, such as an additional 25 to 50 ?m. The result is lightly bonded regions underneath the groove portions and highly bonded regions underneath the protrusions and around the perimeter of the bond. In another embodiment, an ultrasonic bond is formed along a partial width of a ribbon.

Abstract: A flexible conductive ribbon is ultrasonically bonded to the surface of a die and terminals from a lead frame of a package. Multiple ribbons and/or multiple bonded areas provide various benefits, such as high current capability, reduced spreading resistance, reliable bonds due to large contact areas, lower cost and higher throughput due to less areas to bond and test.

Abstract: With the mounting of semiconductor chips on a substrate having a solder portion a semiconductor chip held by a gripper spring mounted on a bondhead is lowered onto the substrate. In doing so, the gripper is deflected towards the bondhead. Subsequently, the semiconductor chip is raised by a predetermined distance and then released. Optionally, the semiconductor chip is moved up and down before being released. With this method, the semiconductor chip is under mechanical control until the solder has taken up a stable form and the semiconductor chip has achieved its final position.