THIN FILM TRANSISTOR
First Claim
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1. A thin film transistor, comprising:
- a substrate;
a channel region formed on the substrate, the channel region being made of a first oxide semiconductor material;
a source region and a drain region formed on each of lateral sides of the channel region, the source region and the drain region being made of a second oxide semiconductor material, the second oxide semiconductor material having a band gap smaller than a band gap of the first oxide semiconductor material;
a gate electrode formed on the channel region; and
a gate insulating layer sandwiched between the gate electrode and the channel region.
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Abstract
A thin film transistor for a semiconductor device is disclosed. The thin film transistor comprises a substrate; a channel region formed on the substrate, the channel region being made of a first oxide semiconductor material; a source region and a drain region formed on each of lateral sides of the channel region, the source region and the drain region being made of a second oxide semiconductor material, the second oxide semiconductor material having a band gap smaller than a band gap of the first oxide semiconductor material; a gate electrode formed on the channel region; and a gate insulating layer sandwiched between the gate electrode and the channel region.
12 Citations
19 Claims
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1. A thin film transistor, comprising:
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a substrate; a channel region formed on the substrate, the channel region being made of a first oxide semiconductor material; a source region and a drain region formed on each of lateral sides of the channel region, the source region and the drain region being made of a second oxide semiconductor material, the second oxide semiconductor material having a band gap smaller than a band gap of the first oxide semiconductor material; a gate electrode formed on the channel region; and a gate insulating layer sandwiched between the gate electrode and the channel region. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A thin film transistor, comprising:
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a substrate; a channel region formed on the substrate, the channel region being made of a first oxide semiconductor material; a source region and a drain region formed on the substrate;
wherein the source regions and the drain region are electrically connected to the channel region;
the source region and the drain region are made of a second oxide semiconductor material; and
the second oxide semiconductor material has a band gap smaller than a band gap of the first oxide semiconductor material; anda gate electrode electrically connected to the channel region, and is spaced from the source region and the drain region. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A thin film transistor, comprising:
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a substrate; a channel region formed on the substrate, the channel region being made of a first oxide semiconductor material; and a source region and a drain region formed on each of lateral sides of the channel region, the source region and the drain region being made of a second oxide semiconductor material, the second oxide semiconductor material having a concentration of carriers greater than a concentration of carriers of the first oxide semiconductor material. - View Dependent Claims (18, 19)
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Specification