公开(公告)号：US10050132B2

公开(公告)日：2018-08-14

申请号：US15664106

申请日：2017-07-31

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Shunpei Yamazaki ,  Akihisa Shimomura ,  Yasumasa Yamane ,  Yuhei Sato ,  Tetsuhiro Tanaka ,  Masashi Tsubuku ,  Toshihiko Takeuchi ,  Ryo Tokumaru ,  Mitsuhiro Ichijo ,  Satoshi Toriumi ,  Takashi Ohtsuki ,  Toshiya Endo

IPC: H01L21/00 ,  H01L29/66 ,  H01L21/02 ,  H01L29/786

Abstract: A change in electrical characteristics is suppressed and reliability in a semiconductor device using a transistor including an oxide semiconductor is improved. One feature resides in forming an oxide semiconductor film over an oxygen-introduced insulating film, and then forming the source and drain electrodes with an antioxidant film thereunder. Here, in the antioxidant film, the width of a region overlapping with the source and drain electrodes is longer than the width of a region not overlapping with them. The transistor formed as such has less defects in the channel region, which will improve reliability of the semiconductor device.

公开(公告)号：US10020322B2

公开(公告)日：2018-07-10

申请号：US15390894

申请日：2016-12-27

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Daigo Ito ,  Takahisa Ishiyama ,  Katsuaki Tochibayashi ,  Yoshinori Ando ,  Yasutaka Suzuki ,  Mitsuhiro Ichijo ,  Toshiya Endo ,  Shunpei Yamazaki

IPC: H01L29/10 ,  H01L27/12 ,  H01L29/49 ,  H01L29/786 ,  H01L29/778 ,  H01L29/24

CPC classification number: H01L27/1225 ,  H01L27/124 ,  H01L27/1248 ,  H01L27/1255 ,  H01L29/24 ,  H01L29/4908 ,  H01L29/7781 ,  H01L29/7782 ,  H01L29/7786 ,  H01L29/78648 ,  H01L29/7869 ,  H01L29/78696 ,  H01L2224/05 ,  H01L2224/48463

Abstract: A highly reliable semiconductor device which includes an oxide semiconductor is provided. Alternatively, a transistor having normally-off characteristics which includes an oxide semiconductor is provided. The transistor includes a first conductor, a first insulator, a second insulator, a third insulator, a first oxide, an oxide semiconductor, a second conductor, a second oxide, a fourth insulator, a third conductor, a fourth conductor, a fifth insulator, and a sixth insulator. The second conductor is separated from the sixth insulator by the second oxide. The third conductor and the fourth conductor are separated from the sixth insulator by the fifth insulator. The second oxide has a function of suppressing permeation of oxygen as long as oxygen contained in the sixth insulator is sufficiently supplied to the oxide semiconductor through the second oxide. The fifth insulator has a barrier property against oxygen.

公开(公告)号：US09793295B2

公开(公告)日：2017-10-17

申请号：US15251375

申请日：2016-08-30

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Shunpei Yamazaki ,  Tetsuhiro Tanaka ,  Yoshinori Ieda ,  Toshiyuki Miyamoto ,  Masafumi Nomura ,  Takashi Hamochi ,  Kenichi Okazaki ,  Mitsuhiro Ichijo ,  Toshiya Endo

IPC: H01L27/12 ,  H01L27/06 ,  H01L27/088

CPC classification number: H01L27/1207 ,  H01L27/0688 ,  H01L27/088 ,  H01L27/1225

Abstract: A nitride insulating film which prevents diffusion of hydrogen into an oxide semiconductor film in a transistor including an oxide semiconductor is provided. Further, a semiconductor device which has favorable electrical characteristics by using a transistor including a silicon semiconductor and a transistor including an oxide semiconductor is provided. Two nitride insulating films having different functions are provided between the transistor including a silicon semiconductor and the transistor including an oxide semiconductor. Specifically, a first nitride insulating film which contains hydrogen is provided over the transistor including a silicon semiconductor, and a second nitride insulating film which has a lower hydrogen content than the first nitride insulating film and functions as a barrier film against hydrogen is provided between the first nitride insulating film and the transistor including an oxide semiconductor.

公开(公告)号：US09076876B2

公开(公告)日：2015-07-07

申请号：US14018712

申请日：2013-09-05

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Mitsuhiro Ichijo ,  Toshiya Endo ,  Kunihiko Suzuki

IPC: H01L29/12 ,  H01L29/786 ,  H01L29/49 ,  H01L29/66

CPC classification number: H01L29/7869 ,  H01L21/02565 ,  H01L21/441 ,  H01L21/477 ,  H01L29/247 ,  H01L29/42384 ,  H01L29/47 ,  H01L29/4908 ,  H01L29/495 ,  H01L29/66969 ,  H01L29/78606 ,  H01L29/78696

Abstract: An object is to provide a semiconductor device having good electrical characteristics. A gate insulating layer having a hydrogen concentration less than 6×1020 atoms/cm3 and a fluorine concentration greater than or equal to 1×1020 atoms/cm3 is used as a gate insulating layer in contact with an oxide semiconductor layer forming a channel region, so that the amount of hydrogen released from the gate insulating layer can be reduced and diffusion of hydrogen into the oxide semiconductor layer can be prevented. Further, hydrogen present in the oxide semiconductor layer can be eliminated with the use of fluorine; thus, the hydrogen content in the oxide semiconductor layer can be reduced. Consequently, the semiconductor device having good electrical characteristics can be provided.

Abstract translation: 目的在于提供具有良好电气特性的半导体器件。 使用具有小于6×1020原子/ cm3的氢浓度和大于或等于1×1020原子/ cm3的氟浓度的栅极绝缘层作为与形成沟道区的氧化物半导体层接触的栅极绝缘层， 从而可以减少从栅极绝缘层释放的氢的量，并且可以防止氢向氧化物半导体层的扩散。 此外，可以通过使用氟来消除存在于氧化物半导体层中的氢; 因此，可以降低氧化物半导体层中的氢含量。 因此，可以提供具有良好电特性的半导体器件。