Hesse Gmbh

Hesse & Knipps Gmbh

Michael Broekelmann

Hans-Juergen Hesse

Matthias Hunstig

Andreas Unger

Piotr Vasiljev

Joerg Wallaschek

Andreas Jochheim

Sebastian Hagenkoetter

A method for operating an ultrasonic bonding apparatus, the ultrasonic bonding apparatus providing an ultrasonic transducer with a carrier, displaceable in a z direction, including an ultrasound generating device which is movable relative to the carrier and is held thereon, and including an ultrasonic tool which is excitable to ultrasonic vibrations by the ultrasound generating device.

Method for operating an ultrasonic connecting device

An ultrasonic tool including a first end face and a second end face opposite the first end face. A tool lateral surface connects the first and second end face. The ultrasonic tool is elongate in a longitudinal direction of the tool, wherein at least the first end face is designed as a connection contact surface that is arranged for pressing the ultrasonic tool against a connection component, wherein the ultrasonic tool has an end region having the connection contact surface, which end region extends from the connection contact surface in the longitudinal direction of the tool over 15 mm, but at most one third of a length of the ultrasonic tool, toward the opposite end face, and wherein a pocket-shaped and/or blind-hole-like recess having a recess lateral surface and having a recess floor facing the connection contact surface is formed at the tool lateral surface in the end region.

Ultrasonic tool and ultrasonic connection device therefor

A device for heating and determining the actual temperature of a bonding tool of an ultrasonic bonder, comprising the bending tool, which has a first end face, a second end face, a lateral surface, which connects the first end face to the second end face, and an absorption region, comprising a temperature measuring unit for determining an actual temperature of the bonding tool at a temperature measuring point, which is provided on the lateral surface of the bonding tool and preferably at a tip of the bonding tool, and comprising a laser generator, a laser beam being provided with the aid of the laser generator, and the laser beam striking the bonding tool in the absorption region, and the bonding tool being heated as a result of the absorption of the laser beam.

Device for heating and determining an actual temperature of a bonding tool of an ultrasonic bonding device

An ultrasonic bonding method for electrical contacting a plurality of battery cells of a battery block. A first connection point is produced in that a bonding tool is heated directly, and a first connection contact surface of a first battery cell and/or a connection conductor is/are heated locally and indirectly by a laser beam directed toward the bonding tool. The connection conductor is pressed against the first connection contact surface of the first battery cell. The bonding tool is excited to vibrate ultrasonically, the ultrasonic vibrations being transferred from the bonding tool to the connection conductor. A second connection point is produced in that the connection conductor is pressed against a second connection contact surface of a second battery cell of the battery block or a common connection contact of the battery block by the bonding tool and excited to vibrate ultrasonically.

Method for electrically contacting a battery block

An ultrasonic tool comprising a first end face and a second end face, which is opposite the first end face, as well as a tool cover surface connecting the first end face and the second end face, wherein the ultrasonic tool is elongated in a longitudinal direction of the tool, wherein at least the first end face is formed as a connecting contact surface, which is arranged for pressing the ultrasonic tool against a connecting component, and wherein the ultrasonic tool comprises an end region comprising the connecting contact surface, which extends from the connecting contact surface in the longitudinal direction of the tool over 15 mm, but at most extends one third of the length of the ultrasonic tool in the direction of the opposite end face, and wherein in the end region, a first partial surface of the tool cover surface is formed as a surface-structured absorption surface.

Ultrasonic tool and ultrasonic connection device herein

A device for establishing a bonding connection, with a bonding head mounted so as to rotate about an axis of rotation, and a transducer () mounted on the bonding head. The transducer () has a piezo actuator () for generating ultrasonic vibration, in particular a natural ultrasonic vibration. Electrodes are () provided on the piezo actuator () in such a way that the piezo actuator () can be excited by an electric field in a field direction () transverse to a polarization direction () of the piezo actuator, and as a result of the excitation and of the connection of the piezo actuator () to the fastening section () and to the tool holder (), the piezo actuator () carries out a shearing motion in a shearing plane () formed by the polarization direction () and by the field direction ().

Device for establishing a bonding connection and transducer therefor

A method for operating an ultrasonic wire bonder. The ultrasonic wire bonder has a bonding head with a bonding tool and with a transducer for exciting ultrasonic vibrations in the bonding tool and a controller () for the transducer (). In a first process phase I a bonding wire is bonded to a substrate. The bonding wire is pressed against the substrate with a bonding force via a tool tip of the bonding tool, and the bonding tool is then excited so as to undergo ultrasonic vibrations in order to produce a bond between the bonding wire and the substrate, the transducer () being excited so as to vibrate for a specified or variable bonding time. In a second process phase II, the actuation of the transducer () is changed and reverberations of the bonding tool are counteracted, the transducer () being operated in a damped manner.

Operating method for an ultrasonic wire bonder with active and passive vibration damping

In a method for ultrasonic bonding, two longitudinal ultrasonic waves propagating in a common working plane oriented parallel to a substrate are induced in one or more ultrasonic transducers and are passed through ultrasound-conducting arms from different spatial directions onto a common connection point of the arms. At the connection point the ultrasonic waves cause an ultrasonic tool arranged directly or indirectly at said connection point to oscillate in two or three dimensions. At least one of the ultrasonic transducers induces an ultrasonic wave with a first harmonic oscillation component and a second oscillation component.

Method for ultrasonic bonding having at least one first and second ultrasonic  transducer generating harmonic oscillation components

A method for quality control during ultrasonic bonding, in which a transducer bonding tool unit and an ultrasonic generator are used and in which, during the bonding, one or more sensors are used to sense measurement signals for one or more parameters, which can vary during the bonding, for assessing the bond quality and/or for influencing the bonding, and which proposes that, during the bonding, at least one speed profile measurement signal representing the time/speed profile of the tip of the ultrasonic tool in the direction of oscillation thereof be sensed. The invention also relates to a bonding apparatus which is suitable for carrying out the method. Furthermore, the invention relates to other quality control methods for ultrasonic bonding and to bonding apparatuses which are suitable for carrying out these methods.

Method for quality control during ultrasonic

A bonding device, particularly for producing bond connections between electrical conductors made of wire material or strip material and contact points of substrates such as electrical circuits, wherein the bonding device comprises a bonding head () which can be rotated about a geometric axis of rotation (D), in particular a vertical axis, and on which a bonding tool () and an ultrasonic transducer () are disposed for ultrasonic vibration excitation of the bonding tool (). It is proposed that the main direction of extension () of the ultrasonic transducer () and/or the direction of extension thereof in the direction of the axis of the minimum moment of inertia extends parallel to the geometric axis of rotation (D) of the bonding head (). The invention further relates to a bonding device or an ultrasonic transducer.

Growing community of inventors

Delbrueck, Germany

Michael Broekelmann