Hesse & Knipps Gmbh

Hess & Knipps Gmbh

Hans J&uuml;rgen Hesse

Frank Walther

J&ouml;rg Wallaschek

Dietmar Holtgrewe

A feed unit for moving parts over short distances has a four-bar chain forming a translating solid parallelogram having two parallel rigid opposite legs, one of which constitutes a base leg, connected to one another by elastic elements and a piezoelectric stack translator extending between and flexibly connected to the rigid legs for articulation relative to the rigid legs and oriented at an angle of incidence (&agr;) with respect to a base leg that is less than 90&deg; and greater than 45&deg;.

Feed unit for moving parts

A quality control method for ultrasonic wire bonding is provided wherein the deformation of the wire to be bonded to a contact surface is substantially constantly monitored. The method includes generating an ultrasonic output table. In the table, the current status of the bonding process is represented as a function of the gradient of deformation of the wire, the impedance of the transducer-bond wedge unit, as well as the currently reached deformation of the wire. The desired gradient of deformation of the wire, a function of the particular status of the process, is specified as the desired value. A correcting variable for the ultrasonic generator is calculated by the addition of correction values formed in the controller to the respective current table values.

Growing community of inventors

Paderborn, Germany

Hans Jürgen Hesse

Growing community of inventors

Paderborn, Germany

Hans J&uuml;rgen Hesse

Hans Jürgen Hesse