GaAs heterostructure metal-insulator-semiconductor integrated circuit technology
First Claim
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1. A heterostructure metal insulator semiconductor comprising:
- a semi-insulating substrate;
a layer of undoped gallium arsenide on said semi-insulting substrate;
a layer of n doped indium gallium arsenide on said undoped gallium arsenide;
a layer of undoped indium gallium arsenide on said n doped indium gallium arsenide;
a layer of undoped aluminum gallium arsenide on said undoped indium gallium arsenide;
a thin layer of silicon on part of said layer of undoped aluminum gallium arsenide;
a layer of silicon dioxide on said silicon;
a layer of tungsten silicide on said silicon dioxide;
a first portion of said layers of aluminum gallium arsenide, undoped indium gallium arsenide and n doped indium gallium arsenide, having a first ion implant; and
a first ohmic contact on said first implant.
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Abstract
Heterostructure metal insulator semiconductor integrated circuit technology resulting in, for instance, GaAs field-effect-transistors having much less gate current leakage and greater voltage range than like technology of the related art.
96 Citations
12 Claims
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1. A heterostructure metal insulator semiconductor comprising:
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a semi-insulating substrate; a layer of undoped gallium arsenide on said semi-insulting substrate; a layer of n doped indium gallium arsenide on said undoped gallium arsenide; a layer of undoped indium gallium arsenide on said n doped indium gallium arsenide; a layer of undoped aluminum gallium arsenide on said undoped indium gallium arsenide; a thin layer of silicon on part of said layer of undoped aluminum gallium arsenide; a layer of silicon dioxide on said silicon; a layer of tungsten silicide on said silicon dioxide; a first portion of said layers of aluminum gallium arsenide, undoped indium gallium arsenide and n doped indium gallium arsenide, having a first ion implant; and a first ohmic contact on said first implant. - View Dependent Claims (2, 3)
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4. A semiconductor comprising:
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a substrate; a layer of undoped GaAs on said substrate; a layer of n doped InGaAs on said layer of undoped GaAs; a layer of undoped InGaAs on said layer of n doped InGaAs; a layer of undoped AlGaAs on said layer of undoped InGaAs; a layer of Si on a portion of said layer of undoped AlGaAs; a layer of SiO2 on said layer of Si; and a layer of metal silicide on said layer of SiO2. - View Dependent Claims (5, 6, 7, 8, 9)
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10. A semiconductor comprising:
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a semi-insulating substrate; a layer of undoped gallium arsenide on said semi-insulating substrate; a layer of n doped indium gallium arsenide on said undoped gallium arsenide; a layer of undoped indium gallium arsenide on said n doped indium gallium arsenide; a layer of undoped aluminum gallium arsenide on said undoped indium gallium arsenide; a layer of silicon dioxide on a portion of said layer of undoped aluminum gallium arsenide; a layer of tungsten silicide on said silicon dioxide; a first portion of said layers of undoped aluminum gallium arsenide, undoped indium gallium arsenide and n doped indium gallium arsenide, having a first ion implant. - View Dependent Claims (11, 12)
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Specification