Ge-Au eutectic bonding of Ge (100) single crystals
Conference
·
· Journal of Low Temperature Physics; (United States)
OSTI ID:5372425
- Lawrence Berkeley Lab., CA (United States)
- Lawrence Berkeley Lab., CA (United States) Univ. of California, Berkeley, CA (United States)
The author present preliminary results on the eutectic bonding between two (100) Ge single crystal surfaces using thin films of Au ranging from 900[angstrom]/surface to 300[angstrom]/surface and Pd (10% the thickness of Au). Following bonding, plan view optical microscopy (OM) of the cleaved interface of samples with Au thicknesses [le] 500[angstrom]/surface show a eutectic morphology more conducive to phonon transmission through the bond interface. High resolution transmission electron microscopy (HRTEM) cross sectional interface studies of a 300[angstrom]/surface Au sample show <100> epitaxial growth of Ge. In sections of the bond, lattice continuity of the Ge is apparent through the interface. TEM studies also reveal <110> heteroepitaxial growth of Au with a Au-Ge lattice mismatch of less than 2%. Eutectic bonds with 200[angstrom]/surface Au have been attained with characterization pending. An optical polishing technique for Ge has been optimized to insure intimate contact between the Ge surfaces prior to bonding. Interferometry analysis of the optically polished Ge surface shows that surface height fluctuations lie within [plus minus]150[angstrom] across an interval of lmm. Characterization of phonon transmission through the interface is discussed with respect to low temperature detection of ballistic phonons.
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5372425
- Report Number(s):
- CONF-930751--; CNN: ADT-8809616; W17605
- Conference Information:
- Journal Name: Journal of Low Temperature Physics; (United States) Journal Volume: 93:3-4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360601 -- Other Materials-- Preparation & Manufacture
440103* -- Radiation Instrumentation-- Nuclear Spectroscopic Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
661300 -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BONDING
CRYSTALS
ELEMENTS
EUTECTICS
FABRICATION
GERMANIUM
GOLD
JOINING
MATTER
METALS
MONOCRYSTALS
NONLUMINOUS MATTER
TRANSITION ELEMENTS
360601 -- Other Materials-- Preparation & Manufacture
440103* -- Radiation Instrumentation-- Nuclear Spectroscopic Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
661300 -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BONDING
CRYSTALS
ELEMENTS
EUTECTICS
FABRICATION
GERMANIUM
GOLD
JOINING
MATTER
METALS
MONOCRYSTALS
NONLUMINOUS MATTER
TRANSITION ELEMENTS