• 专利标题:   Method for increasing uniformity of epitaxial wafer of silicon carbide-pyrolytic graphene, by placing silicon carbide substrate on susceptor, pyrolyzing, filling reaction chamber with protective gas and taking out epitaxial wafer.
  • 专利号:   CN108046247-A
  • 发明人:   ZHAO Z, LI Y, WANG Y, LI Z
  • 专利权人:   55TH RES INST CHINA ELECTRONIC TECHNOLOG
  • 国际专利分类:   C01B032/188
  • 专利详细信息:   CN108046247-A 18 May 2018 C01B-032/188 201848 Pages: 6 Chinese
  • 申请详细信息:   CN108046247-A CN11420154 25 Dec 2017
  • 优先权号:   CN11420154

▎ 摘  要

NOVELTY - Method for increasing uniformity of epitaxial wafer of silicon carbide-pyrolytic graphene involves placing cleaned silicon carbide substrate on susceptor in a chemical vapor deposition apparatus, setting reaction chamber pressure to 30-120 mbar, shielding gas flow rate to 10-50 l/minute, carrying out pyrolysis at temperature of 1550-1650 degrees C for 30-60 minutes, slowly reducing temperature to 1400-1450 degrees C by linear ramping, annealing at 1400-1450 degrees C, cooling to room temperature, filling reaction chamber with protective gas and taking out epitaxial wafer of silicon carbide-pyrolytic graphene. USE - Method for increasing uniformity of epitaxial wafer of silicon carbide-pyrolytic graphene. ADVANTAGE - The method provides epitaxial wafer of silicon carbide-pyrolytic graphene with improved uniformity and consistency of carbon atom reconstitution during annealing.