Bond and release layer transfer process

• Main Authors: Kang Sien, Zhong Mingyu, Henley Francois J, Li Minghang
• Format: Patent
• Language: English
• Published: 02.01.2018
• Subjects: AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR; BASIC ELECTRIC ELEMENTS; CHEMISTRY; CRYSTAL GROWTH; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; METALLURGY; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; REFINING BY ZONE-MELTING OF MATERIAL; SEMICONDUCTOR DEVICES; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; SINGLE-CRYSTAL-GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL

Embodiments transfer thin layers of material utilized in electronic devices (e.g., GaN for optoelectronic devices), from a donor to a handle substrate. Certain embodiments employ bond-and-release system(s) where release occurs along a cleave plane formed by implantation of particles into the donor. Some embodiments may rely upon release by converting components from solid to liquid under carefully controlled thermal conditions (e.g., solder-based materials and/or thermal decomposition of Indium-containing materials). Some embodiments utilize laser-induced film release processes using epitaxially grown or implanted regions as an optically absorptive region. A single bond-and-release sequence may involve processing an exposed N-face of GaN material. Multiple bond-and-release sequences (involving processing an exposed Ga-face of GaN material) may be employed in series, for example utilizing a temporary handle substrate as an intermediary. Particular embodiments form template blanks of high quality GaN suitable for manufacturing High Brightness-Light Emitting Diode (HB-LED) devices.