LDMOS and CMOS integrated circuit and method of making
First Claim
1. An integrated circuit on a substrate, comprising:
- a first well having a first dopant concentration and including a second conductivity type low-voltage transistor;
a second well having a dopant concentration equal to the first dopant concentration and including a first conductivity type high-voltage transistor;
a third well having a second dopant concentration of an opposite type than the first well and including a first conductivity type low-voltage transistor; and
wherein the first conductivity type low-voltage transistor and the second conductivity type low-voltage transistor are created without a threshold voltage (Vt) implant.
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Abstract
An integrated circuit (IC) is formed on a substrate. The IC has a first well having a first dopant concentration that includes a second conductivity low-voltage transistor. The IC also has a second well having a dopant concentration equal to the first dopant concentration that includes a first conductivity high-voltage transistor. In addition, the IC has a third well having a second dopant concentration of an opposite type than the first well that includes a first conductivity low-voltage transistor. The first conductivity low-voltage transistor and the second conductivity low-voltage transistor are created without a threshold voltage (Vt) implant.
22 Citations
10 Claims
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1. An integrated circuit on a substrate, comprising:
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a first well having a first dopant concentration and including a second conductivity type low-voltage transistor;
a second well having a dopant concentration equal to the first dopant concentration and including a first conductivity type high-voltage transistor;
a third well having a second dopant concentration of an opposite type than the first well and including a first conductivity type low-voltage transistor; and
wherein the first conductivity type low-voltage transistor and the second conductivity type low-voltage transistor are created without a threshold voltage (Vt) implant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10-17. -17. (cancelled).
Specification