Patents by Inventor Chikao Uemura

Chikao Uemura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Solar cells based on indium phosphide
    Patent number: 4591654
    Abstract: An InP solar cell having a p-type InP single crystal substrate having a carrier concentration of 2.times.10.sup.16 -2.times.10.sup.18 cm.sup.-3, an n-type InP layer containing a dopant of at least one element selected from VIA group including S and Se disposed on said substrate with a thickness of 0.05-1 .mu.m, said n-type InP layer having a carrier concentration of 5.times.10.sup.17 -1.times.10.sup.19 cm.sup.-3, a grid electrode arranged on said n-type InP layer, and an anti-reflection coating formed on said n-type InP layer and said grid electrode. The solar cell has a high efficiency and superior radiation resistance characteristics.
    Type: Grant
    Filed: July 16, 1984
    Date of Patent: May 27, 1986
    Assignee: Nippon Telegraph and Telephone Public Corporation
    Inventors: Masafumi Yamaguchi, Akio Yamamoto, Chikao Uemura