Methods of forming field effect transistors and field effect transistor circuitry
First Claim
1. Field effect transistor circuitry comprising:
- a field effect transistor supported by a substrate and having a body within the substrate, the transistor having a gate;
a diode assembly supported by the substrate and connected between the gate, body and a reference voltage node; and
wherein the diode assembly comprises first and second diode assemblies positioned over the substrate.
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Abstract
Methods of forming field effect transistors and resultant field effect transistor circuitry are described. In one embodiment, a semiconductive substrate includes a field effect transistor having a body. A first resistive element is received by the substrate and connected between the transistor'"'"'s gate and the body. A second resistive element is received by the substrate and connected between the body and a reference voltage node. The first and second resistive elements form a voltage divider which is configured to selectively change threshold voltages of the field effect transistor with state changes in the gate voltage. In a preferred embodiment, first and second diode assemblies are positioned over the substrate and connected between the gate and body, and the body and a reference voltage node to provide the voltage divider.
66 Citations
34 Claims
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1. Field effect transistor circuitry comprising:
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a field effect transistor supported by a substrate and having a body within the substrate, the transistor having a gate;
a diode assembly supported by the substrate and connected between the gate, body and a reference voltage node; and
wherein the diode assembly comprises first and second diode assemblies positioned over the substrate. - View Dependent Claims (2, 3, 4, 5)
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6. Field effect transistor circuitry comprising:
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a field effect transistor supported by a substrate and having a body within the substrate, the transistor having a gate; and
a diode assembly supported by the substrate and connected between the body and a reference voltage node, the diode assembly forming a part of a voltage divider configured to selectively change threshold voltages of the field effect transistor with changes in the gate voltage. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. Monolithic field effect transistor circuitry comprising:
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a field effect transistor having a body, the transistor having a gate; and
a voltage divider circuit coupled to the gate and body, the circuit being configured to selectively change threshold voltages of the field effect transistor with changes in the gate voltage. - View Dependent Claims (14, 15, 16, 17, 18)
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19. Field effect transistor circuitry comprising:
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a silicon substrate;
a field effect transistor supported by the substrate and having a body within the substrate, the transistor having a gate;
a diode assembly supported by the substrate and connected between the gate, body and a reference voltage node; and
wherein the diode assembly comprises first and second diode assemblies positioned over the substrate. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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26. Field effect transistor circuitry comprising:
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a silicon semiconductive substrate;
a field effect transistor supported by the substrate and having a body within the substrate, the transistor having a gate; and
a diode assembly supported by the substrate and connected between the body and a reference voltage node, the diode assembly forming a part of a voltage divider configured to selectively change threshold voltages of the field effect transistor with changes in the gate voltage.
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27. Field effect transistor circuitry comprising:
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a field effect transistor supported by a substrate and having a body within the substrate, the transistor having a gate;
a diode assembly supported by the substrate and connected between the gate, body and a reference voltage node; and
wherein the diode assembly comprises;
a first diode assembly supported by the substrate and connected between the gate and the body; and
a second diode assembly supported by the substrate and connected between the body and reference voltage node.
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28. Field effect transistor circuitry comprising:
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a field effect transistor supported by a substrate and having a body within the substrate, the transistor having a gate;
a diode assembly supported by the substrate and connected between the gate, body and a reference voltage node;
wherein the diode assembly is not a Zener; and
wherein the diode assembly is provided elevationally over a surface of the substrate. - View Dependent Claims (29, 30)
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31. Field effect transistor circuitry comprising:
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a silicon substrate;
a field effect transistor supported by the substrate and having a body within the substrate, the transistor having a gate;
a diode assembly supported by the substrate and connected between the gate, body and a reference voltage node, the diode assembly is directly connected to the reference voltage node; and
wherein the diode assembly is not a Zener diode. - View Dependent Claims (32, 33, 34)
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Specification