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Vacancy No. IPE 15-19

Bachelor- or Masterthesis:: Exploring Sintered Metal Matrix Composites for High Temperature Power Electronics

Job description

Packaging technology for power semiconductors provides immediate heat spreading and removal and has to ensure electrical and thermomechanical integrity over the entire module lifetime. At junction temperatures of 225°C and beyond, however, typical solder alloys used for die bonding embrittle or melt. Sintered metallic nano-/microparticle pastes in turn provide low electrical and thermal resistance with good thermal cycling performance and a first step in reducing mismatch of coefficients of thermal expansion (CTE) between chip and substrate.

This thesis addresses the need for sintering materials with significantly reduced CTE to alleviate stresses in the immediate vicinity of the chip surfaces and active structures by investigating the preparation, mechanical and microstructural properties of sintered metal matrix composites containing metalized carbon fibers.

Aspects of your work

  • prepartion of novel carbon fiber (CF) metal matrix composites based on Ag and Cu sinter pastes
  • insights into paste processing behavior and compatibility with stencil and screen printing
  • effects of fiber concentration, length and pre-treatment on shear strength and thermal expansion
  • electrical, mechanical and thermal performance of die attach layers composed of CF-MMCs

Personal qualification

Study of electrical or mechanical engineering, physics, or material science.

Organizational unit

Institute for Data Processing and Electronics (IPE)

Starting date

as soon as possible

Contract Duration

according the study regulations

Contact person in line-management

Helge Wurst, phone:  0721/ 608 29148 , helge.wurst@kit.edu

Dr. Thomas Blank, phone: 0721/ 608 25618 , thomas.blank@kit.edu


Please apply online using the button below for this vacancy number IPE 15-19.
Personnel Support is provided by

Ms Schaber
Telefon: +49 721 608-25184,

Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany

If qualified, severely disabled persons will be preferred.


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