Crystal structure of laser-induced subsurface modifications in Si
- Univ. of Twente, Enschede (Netherlands). Faculty of Engineering Technology. Chair of Applied Laser Technology
- Australian National Univ., Canberra, ACT (Australia). Research School of Physics and Engineering
- Australian National Univ., Canberra, ACT (Australia). Research School of Physics and Engineering; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical and Engineering Materials Division
Laser-induced subsurface modification of dielectric materials is a well-known technology. Applications include the production of optical components and selective etching. In addition to dielectric materials, the subsurface modification technology can be applied to silicon, by employing near to mid-infrared radiation. An application of subsurface modifications in silicon is laser-induced subsurface separation, which is a method to separate wafers into individual dies. Other applications for which proofs of concept exist are the formation of waveguides and resistivity tuning. However, limited knowledge is available about the crystal structure of subsurface modifications in silicon. In this paper, we investigate the geometry and crystal structure of laser-induced subsurface modifications in monocrystalline silicon wafers. Finally, in addition to the generation of lattice defects, we found that transformations to amorphous silicon and Si-iii/Si-xii occur as a result of the laser irradiation.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- Contributing Organization:
- Univ. of Twente, Enschede (Netherlands); Australian National Univ., Canberra, ACT (Australia)
- OSTI ID:
- 1265519
- Journal Information:
- Applied Physics. A, Materials Science and Processing, Vol. 120, Issue 2; ISSN 0947-8396
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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