发明名称 |
Integrated circuit device |
摘要 |
An integrated circuit device includes a semiconductor substrate and a first transistor and a second transistor constructed in the semiconductor substrate. The first transistor has a first operating voltage higher than a second operating voltage of a second transistor. The first transistor includes a first drain structure, a first source structure, an isolation structure and a first gate structure. The first source structure includes a high voltage first-polarity well region, a first-polarity body region, a heavily doped first-polarity region, a second-polarity grade region and a heavily doped second-polarity region. The heavily doped second-polarity region is surrounded by the second-polarity grade region. The second-polarity grade region is surrounded by the first-polarity body region. The second transistor includes a second drain structure, a second source structure, a second gate structure and a first-polarity drift region. The first-polarity drift region and the first-polarity body region have the same dopant concentration. |
申请公布号 |
US8896021(B2) |
申请公布日期 |
2014.11.25 |
申请号 |
US201113232048 |
申请日期 |
2011.09.14 |
申请人 |
United Microelectronics Corporation |
发明人 |
Huang Chung-I;Chang Pao-An;Lee Ming-Tsung |
分类号 |
H01L29/66;H01L27/088;H01L29/78;H01L27/06;H01L29/739;H01L29/06;H01L29/08;H01L29/40 |
主分类号 |
H01L29/66 |
代理机构 |
WPAT, PC |
代理人 |
WPAT, PC ;King Justin |
主权项 |
1. An integrated circuit device comprising a semiconductor substrate and a first transistor and a second transistor constructed in the semiconductor substrate, the first transistor having a first operating voltage, the second transistor having a second operating voltage, the first operating voltage is higher than the second operating voltage,
wherein the first transistor comprises: a first drain structure formed in the semiconductor substrate; a first source structure formed in the semiconductor substrate, and comprising a high voltage first-polarity well region, a first-polarity body region, a heavily doped first-polarity region, a second-polarity grade region and a heavily doped second-polarity region, wherein the heavily doped second-polarity region is surrounded by the second-polarity grade region, and the second-polarity grade region is surrounded by the first-polarity body region; an isolation structure formed in the semiconductor substrate, and arranged between the first drain structure and the first source structure; and a first gate structure arranged between the first source structure and the first drain structure, and partially disposed over the isolation structure, wherein the second transistor comprises: a second drain structure formed in the semiconductor substrate; a second source structure formed in the semiconductor substrate; a second gate structure formed in the semiconductor substrate, and arranged between the second source structure and the second drain structure; and a first-polarity drift region formed in the semiconductor substrate for at least surrounding the second drain structure, wherein the first-polarity drift region and the first-polarity body region have the same dopant concentration. |
地址 |
Hsinchu TW |