2449453

Information

• Patent Grant
• 2449453

• References
• Source

• Patent Number

  2,449,453

• Date Filed

  Not available

• Date Issued

  Tuesday, September 14, 1948
  76 years ago

• CPC

  • H01L21/161 - Preparation of the foundation plate, preliminary treatment oxidation of the foundation plate, reduction treatment
  • H01L21/164 - Oxidation and subsequent heat treatment of the foundation plate

• US Classifications

  • 438 - Semiconductor device manufacturing: process
  • 148 - Metal treatment
  • 257 - Active solid-state devices