公开(公告)号：US20190355764A1

公开(公告)日：2019-11-21

申请号：US16522912

申请日：2019-07-26

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Junichi KOEZUKA ,  Masami JINTYOU ,  Yukinori SHIMA ,  Daisuke KUROSAKI ,  Masataka NAKADA ,  Shunpei YAMAZAKI

IPC: H01L27/12 ,  H01L29/786

Abstract: A semiconductor device including an oxide semiconductor in which on-state current is high is provided. The semiconductor device includes a first transistor provided in a driver circuit portion and a second transistor provided in a pixel portion; the first transistor and the second transistor have different structures. Furthermore, the first transistor and the second transistor are transistors having a top-gate structure. In an oxide semiconductor film of each of the transistors, an impurity element is contained in regions which do not overlap with a gate electrode. The regions of the oxide semiconductor film which contain the impurity element function as low-resistance regions. Furthermore, the regions of the oxide semiconductor film which contain the impurity element are in contact with a film containing hydrogen. The first transistor provided in the driver circuit portion includes two gate electrodes between which the oxide semiconductor film is provided.

公开(公告)号：US20190317374A1

公开(公告)日：2019-10-17

申请号：US16461994

申请日：2017-11-16

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei YAMAZAKI ,  Yukinori SHIMA ,  Kenichi OKAZAKI ,  Natsuko TAKASE

IPC: G02F1/1362 ,  G02F1/1343

Abstract: A liquid crystal display device with a high aperture ratio is provided. A liquid crystal display device with low power consumption is provided. The display device includes a display portion and a driver circuit portion. The display portion includes a liquid crystal element, a first transistor, a scan line, and a signal line. The driver circuit portion includes a second transistor. The liquid crystal element includes a pixel electrode, a liquid crystal layer, and a common electrode. Each of the scan line and the signal line is electrically connected to the first transistor. The scan line and the signal line each include a metal layer. The structure of the first transistor is different from that of the second transistor. The first transistor is electrically connected to the pixel electrode. The first transistor includes a first region connected to the pixel electrode. The pixel electrode, the common electrode, and the first region have a function of transmitting visible light. Visible light passes through the first region and the liquid crystal element and is emitted to the outside of the display device.

公开(公告)号：US20190288093A1

公开(公告)日：2019-09-19

申请号：US16429176

申请日：2019-06-03

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Junichi KOEZUKA ,  Yukinori SHIMA ,  Hajime TOKUNAGA ,  Toshinari SASAKI ,  Keisuke MURAYAMA ,  Daisuke MATSUBAYASHI

IPC: H01L29/66 ,  H01L29/786 ,  H01L29/51 ,  H01L21/02 ,  H01L27/12

Abstract: To reduce defects in an oxide semiconductor film in a semiconductor device. To improve the electrical characteristics and the reliability of a semiconductor device including an oxide semiconductor film. In a semiconductor device including a transistor including a gate electrode formed over a substrate, a gate insulating film covering the gate electrode, a multilayer film overlapping with the gate electrode with the gate insulating film provided therebetween, and a pair of electrodes in contact with the multilayer film, a first oxide insulating film covering the transistor, and a second oxide insulating film formed over the first oxide insulating film, the multilayer film includes an oxide semiconductor film and an oxide film containing In or Ga, the first oxide insulating film is an oxide insulating film through which oxygen is permeated, and the second oxide insulating film is an oxide insulating film containing more oxygen than that in the stoichiometric composition.

公开(公告)号：US20180350996A1

公开(公告)日：2018-12-06

申请号：US16043544

申请日：2018-07-24

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Junichi KOEZUKA ,  Yukinori SHIMA ,  Suzunosuke HIRAISHI ,  Kenichi OKAZAKI

IPC: H01L29/786 ,  H01L27/12 ,  H01L29/66 ,  H01L29/423

CPC classification number: H01L29/7869 ,  H01L27/1225 ,  H01L29/42384 ,  H01L29/66969 ,  H01L29/78606 ,  H01L29/78618 ,  H01L29/78633 ,  H01L29/78696

Abstract: To reduce defects in an oxide semiconductor film in a semiconductor device. To improve electrical characteristics of and reliability in the semiconductor device including an oxide semiconductor film. A method for manufacturing a semiconductor device includes the steps of forming a gate electrode and a gate insulating film over a substrate, forming an oxide semiconductor film over the gate insulating film, forming a pair of electrodes over the oxide semiconductor film, forming a first oxide insulating film over the oxide semiconductor film and the pair of electrodes by a plasma CVD method in which a film formation temperature is 280° C. or higher and 400° C. or lower, forming a second oxide insulating film over the first oxide insulating film, and performing heat treatment at a temperature of 150° C. to 400° C. inclusive, preferably 300° C. to 400° C. inclusive, further preferably 320° C. to 370° C. inclusive.

公开(公告)号：US20180294363A1

公开(公告)日：2018-10-11

申请号：US16003145

申请日：2018-06-08

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Junichi KOEZUKA ,  Yukinori SHIMA ,  Hajime TOKUNAGA ,  Toshinari SASAKI ,  Keisuke MURAYAMA ,  Daisuke MATSUBAYASHI

IPC: H01L29/786 ,  H01L29/66 ,  H01L29/51 ,  H01L21/02 ,  H01L29/24

Abstract: In a semiconductor device including a transistor including a gate electrode formed over a substrate, a gate insulating film covering the gate electrode, a multilayer film overlapping with the gate electrode with the gate insulating film provided therebetween, and a pair of electrodes in contact with the multilayer film, a first oxide insulating film covering the transistor, and a second oxide insulating film formed over the first oxide insulating film, the multilayer film includes an oxide semiconductor film and an oxide film containing In or Ga, the oxide semiconductor film has an amorphous structure or a microcrystalline structure, the first oxide insulating film is an oxide insulating film through which oxygen is permeated, and the second oxide insulating film is an oxide insulating film containing more oxygen than that in the stoichiometric composition.

公开(公告)号：US20180254352A1

公开(公告)日：2018-09-06

申请号：US15904867

申请日：2018-02-26

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Junichi KOEZUKA ,  Kenichi OKAZAKI ,  Yukinori SHIMA ,  Yasutaka NAKAZAWA ,  Yasuharu HOSAKA ,  Shunpei YAMAZAKI

IPC: H01L29/786 ,  H01L29/24 ,  H01L29/66 ,  H01L21/02 ,  H01L27/12

CPC classification number: H01L29/78696 ,  G02F1/1333 ,  G02F1/13338 ,  G02F1/1368 ,  G02F2001/13685 ,  G06F3/0412 ,  G06F3/044 ,  H01L21/02554 ,  H01L21/02565 ,  H01L21/02631 ,  H01L27/0296 ,  H01L27/1225 ,  H01L27/1259 ,  H01L27/127 ,  H01L27/3262 ,  H01L29/24 ,  H01L29/66969 ,  H01L29/78606 ,  H01L29/78648 ,  H01L29/7869

Abstract: A semiconductor device with favorable electrical characteristics is to be provided. A highly reliable semiconductor device is to be provided. A semiconductor device with lower power consumption is to be provided. The semiconductor device includes a gate electrode, a first insulating layer over the gate electrode, a metal oxide layer over the first insulating layer, a pair of electrodes over the metal oxide layer, and a second insulating layer over the pair of electrodes. The first insulating layer includes a first region and a second region. The first region has a region being in contact with the metal oxide layer and containing more oxygen than the second region. The second region has a region containing more nitrogen than the first region. The metal oxide layer has at least a concentration gradient of oxygen in a thickness direction, and the concentration gradient becomes high on a first region side and on a second region side.

公开(公告)号：US20180197888A1

公开(公告)日：2018-07-12

申请号：US15904537

申请日：2018-02-26

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hiroyuki MIYAKE ,  Kenichi OKAZAKI ,  Yasuharu HOSAKA ,  Yukinori SHIMA

IPC: H01L27/12 ,  H01L51/00 ,  H01L29/786 ,  H01L29/778 ,  H01L29/66 ,  H01L29/24 ,  H01L29/04 ,  H01L27/32

CPC classification number: H01L27/1225 ,  H01L27/127 ,  H01L27/3262 ,  H01L29/045 ,  H01L29/24 ,  H01L29/66969 ,  H01L29/7782 ,  H01L29/7786 ,  H01L29/78606 ,  H01L29/78648 ,  H01L29/7869 ,  H01L29/78696 ,  H01L51/005

Abstract: Provided is a novel semiconductor device. The semiconductor device comprises a first transistor and a second transistor. The first transistor comprises a first gate electrode; a first insulating film over the first gate electrode; a first oxide semiconductor film over the first insulating film; a first source electrode and a first drain electrode over the first oxide semiconductor film; a second insulating film over the first oxide semiconductor film, the first source electrode, and the first drain electrode; and a second gate electrode over the second insulating film. The second transistor comprises a first drain electrode; the second insulating film over the second drain electrode; a second oxide semiconductor film over the second insulating film; a second source electrode and a second drain electrode over the second oxide semiconductor film; a third insulating film over the second oxide semiconductor film, the second source electrode, and the second drain electrode; and a third gate electrode over the third insulating film. The first oxide semiconductor film partly overlaps with the second oxide semiconductor film.

公开(公告)号：US20170278874A1

公开(公告)日：2017-09-28

申请号：US15464534

申请日：2017-03-21

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Shunpei YAMAZAKI ,  Junichi KOEZUKA ,  Kenichi OKAZAKI ,  Yukinori SHIMA ,  Shinpei MATSUDA ,  Haruyuki BABA ,  Ryunosuke HONDA

IPC: H01L27/12 ,  H01L29/66 ,  H01L29/786

CPC classification number: H01L27/1225 ,  H01L27/127 ,  H01L29/24 ,  H01L29/66969 ,  H01L29/7781 ,  H01L29/7782 ,  H01L29/7786 ,  H01L29/7869 ,  H01L29/78696

Abstract: To improve field-effect mobility and reliability in a transistor including an oxide semiconductor film. A semiconductor device includes a transistor including an oxide semiconductor film. The transistor includes a region where the maximum value of field-effect mobility of the transistor at a gate voltage of higher than 0 V and lower than or equal to 10 V is larger than or equal to 40 and smaller than 150; a region where the threshold voltage is higher than or equal to minus 1 V and lower than or equal to 1 V; and a region where the S value is smaller than 0.3 V/decade.

公开(公告)号：US20170186843A1

公开(公告)日：2017-06-29

申请号：US15391186

申请日：2016-12-27

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yasuharu Hosaka ,  Toshimitsu OBONAI ,  Yukinori SHIMA ,  Masami JINTYOU ,  Daisuke KUROSAKI ,  Takashi HAMOCHI ,  Junichi KOEZUKA ,  Kenichi OKAZAKI ,  Shunpei YAMAZAKI

IPC: H01L29/24 ,  C04B35/453 ,  C04B35/622 ,  H01L29/786

CPC classification number: H01L29/24 ,  C03C17/245 ,  C03C2217/23 ,  C03C2218/151 ,  C04B35/01 ,  C04B35/453 ,  C04B35/62218 ,  C04B2235/3217 ,  C04B2235/3225 ,  C04B2235/3284 ,  C04B2235/3286 ,  C04B2235/3293 ,  C04B2235/787 ,  C04B2235/96 ,  C23C14/08 ,  C23C14/5853 ,  H01L27/1225 ,  H01L29/7782 ,  H01L29/7786 ,  H01L29/78648 ,  H01L29/7869 ,  H01L29/78696

Abstract: A metal oxide film includes indium, M, (M is Al, Ga, Y, or Sn), and zinc and includes a region where a peak having a diffraction intensity derived from a crystal structure is observed by X-ray diffraction in the direction perpendicular to the film surface. Moreover, a plurality of crystal parts is observed in a transmission electron microscope image in the direction perpendicular to the film surface. The proportion of a region other than the crystal parts is higher than or equal to 20% and lower than or equal to 60%.

公开(公告)号：US20170186778A1

公开(公告)日：2017-06-29

申请号：US15386649

申请日：2016-12-21

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hiroyuki MIYAKE ,  Kenichi OKAZAKI ,  Yasuharu HOSAKA ,  Yukinori SHIMA

IPC: H01L27/12 ,  H01L51/00 ,  H01L29/04 ,  H01L29/66 ,  H01L29/786 ,  H01L29/24

CPC classification number: H01L27/1225 ,  H01L27/127 ,  H01L27/3262 ,  H01L29/045 ,  H01L29/24 ,  H01L29/66969 ,  H01L29/7782 ,  H01L29/7786 ,  H01L29/78606 ,  H01L29/78648 ,  H01L29/7869 ,  H01L29/78696 ,  H01L51/005

Abstract: Provided is a novel semiconductor device. The semiconductor device comprises a first transistor and a second transistor. The first transistor comprises a first gate electrode; a first insulating film over the first gate electrode; a first oxide semiconductor film over the first insulating film; a first source electrode and a first drain electrode over the first oxide semiconductor film; a second insulating film over the first oxide semiconductor film, the first source electrode, and the first drain electrode; and a second gate electrode over the second insulating film. The second transistor comprises a first drain electrode; the second insulating film over the second drain electrode; a second oxide semiconductor film over the second insulating film; a second source electrode and a second drain electrode over the second oxide semiconductor film; a third insulating film over the second oxide semiconductor film, the second source electrode, and the second drain electrode; and a third gate electrode over the third insulating film. The first oxide semiconductor film partly overlaps with the second oxide semiconductor film.