×

Semiconductor article with porous structure

  • US 6,246,068 B1
  • Filed: 12/16/1998
  • Issued: 06/12/2001
  • Est. Priority Date: 10/06/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A semiconductor article havinga nonporous semiconductor substrate, first, second and third porous semiconductor layers formed on the nonporous semiconductor substrate, and a nonporous semiconductor layer formed on the first porous semiconductor layer, wherein the second porous semiconductor layer has a density lower than those of the first and third semiconductor layers, the first, second and third porous layers all have a density lower than the semiconductor substrate and the semiconductor layer, and the nonporous semiconductor layer is capable of being separated from the nonporous semiconductor substrate.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×