Born 1942 in Copenhagen. Study of electronic engineering and solid-state physics, PhD Technical Univ. Denmark (1969), Research associate Univ. of Pennsylvania (1969), Adjunct Professor Copenhagen Univ. (1970), Lecturer Technical Univ. Denmark (1972), Visiting Professor University of Geneva (1978), emeritus Director and Scientific Member at the Max Planck Institute for Solid State Research, Honorary Professor Stuttgart Univ. (since 1982).