Preparation of carbonaceous semiconductor material
AssigneeUbe Industries, Ltd.
InventorsMasao Doyama, Shigehiko Yamada
Life of this patent
Estimating the term…
Abstract
Carbonaceous semiconductor material is prepared by heating an organic polymer to carbonize the polymer and incorporating into the carbonized polymer one or more hetero atoms such as those of Group II, III, IV, V and VI of the Periodic Table. Carbonaceous semiconductor material is also prepared by heating an organic polymer containing one or more of the hetero atoms until the hetero atom-containing polymer is carbonized.
Claims12
A process for preparing carbonaceous p-type semiconductor material which comprises the steps of:
- heating an aromatic polyimide to carbonize the polyimide;
- and
- incorporating into the carbonized polyimide one or more hetero atoms other than carbon atom which are selected from the group consisting of B, Al, Ga, and In.
A process for preparing carbonaceous n-type semiconductor material which comprises the steps of:
- heating an aromatic polyimide to carbonize the polyimide;
- and
- incorporating into the carbonized polyimide one or more hetero atoms other than carbon atom which are selected from the group consisting of P, As, Sb and Bi.
A process for preparing carbonaceous n-type semiconductor material which comprises heating an aromatic polyimide which contains one or more hetero atoms other than carbon atom which are selected from the group consisting of P, As, Sb and Bi, to carbonize the hetero atom-containing polyimide.
A process for preparing carbonaceous p-type semiconductor material, which comprises heating an aromatic polyimide which contains one or more hetero atoms which are selected from the group consisting of Al, Ga and In, to carbonize the hetero atom-containing polyimide.
Dependencies are inferred from the claim text.