Zener diode with reduced substrate current
First Claim
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1. A Zener diode comprising:
- a substrate including semiconductor material having a first conductivity type;
an isolation tub located in the semiconductor material, the isolation tub having a second conductivity type, and the isolation tub generally defining a first interior volume;
a sidewall located within the first interior volume, the sidewall having the first conductivity type, and the sidewall generally defining a second interior volume;
a first region having the first conductivity type, formed in the semiconductor material, the first region located within the second interior volume;
a second region having the second conductivity type, formed in the semiconductor material and overlying the first region, the second region located within the second interior volume, wherein the second conductivity type is opposite the first conductivity type; and
an electrode formed in the second region, wherein the electrode is electrically coupled to the first region.
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Abstract
A Zener diode is fabricated on a semiconductor substrate having semiconductor material thereon. The Zener diode includes a first well region having a first conductivity type, formed in the semiconductor material. The Zener diode also includes a first region having a second conductivity type, formed in the first well region (the second conductivity type is opposite the first conductivity type). The Zener diode also includes a second region having the first conductivity type, wherein the second region is formed in the first well region and overlying the first region. An electrode is formed in the first region, and the electrode is electrically coupled to the second region.
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Citations
16 Claims
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1. A Zener diode comprising:
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a substrate including semiconductor material having a first conductivity type; an isolation tub located in the semiconductor material, the isolation tub having a second conductivity type, and the isolation tub generally defining a first interior volume; a sidewall located within the first interior volume, the sidewall having the first conductivity type, and the sidewall generally defining a second interior volume; a first region having the first conductivity type, formed in the semiconductor material, the first region located within the second interior volume; a second region having the second conductivity type, formed in the semiconductor material and overlying the first region, the second region located within the second interior volume, wherein the second conductivity type is opposite the first conductivity type; and an electrode formed in the second region, wherein the electrode is electrically coupled to the first region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A Zener diode comprising:
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a substrate including semiconductor material; an isolation tub located in the semiconductor material, the isolation tub generally defining a first interior volume; a first-type well region located in the semiconductor material, the first-type well region being generally configured as a sidewall located within the first interior volume, the sidewall generally defining a second interior volume; a first-type region located in the semiconductor material, the first-type region being located within the second interior volume; a second-type region formed in the semiconductor material, the second-type region being located within the second interior volume and overlying the first-type region; an electrode region formed in the second-type region; a first-type plug region extending from the electrode region to the first-type region, the first-type plug region electrically connecting the electrode region to the first-type region; and a Zener implant region formed in the second-type region, the Zener implant region extending from the electrode region toward the first-type region. - View Dependent Claims (13, 14, 15, 16)
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Specification