Semiconductor Energy Laboratory Co., Ltd.

Shuhei Yoshitomi

Takahiro Kawakami

Yohei Momma

Teruaki Ochiai

Junichiro Sakata

Masashi Tsubuku

Takuya Hirohashi

Mako Motoyoshi

Masahiko Hayakawa

Satoshi Seo

Miyuki Hosoba

Junya Goto

Hiroyuki Tomatsu

Hiromichi Godo

Shunpei Yamazaki

Masahiro Takahashi

Daisuke Kubota

Koji Kusunoki

Takahiro Tsuji

Tatsuya Ikenuma

Hiroyuki Miyake

Akiharu Miyanaga

Takayuki Inoue

Mayumi Mikami

Yumiko Yoneda

Suzunosuke Hiraishi

Yumiko Saito

Erumu Kikuchi

Shunsuke Adachi

Koki Inoue

Takahiro Tuji

Kensuke Yoshizumi

Mikio Yukawa

Nozomu Sugisawa

Ryo Tokumaru

Tomokazu Yokoi

Takaaki Nagata

Michiko Aizawa

A high-definition liquid crystal display device is provided. A liquid crystal display device with a high aperture ratio is provided. A liquid crystal display device with a high contrast ratio and display quality is provided. A liquid crystal display device capable of being driven at a low voltage is provided. The display device includes, between a pair of substrates, a pixel electrode, a first common electrode, a second common electrode, and a liquid crystal layer. The pixel electrode and the first common electrode are positioned between the liquid crystal layer and one of the substrates. The second common electrode is positioned between the liquid crystal layer and the other substrate. The same potential is supplied to the first common electrode and the second common electrode. The first common electrode includes a portion overlapping with the second common electrode between the display regions of two adjacent subpixels that exhibit different colors. At least one of the pixel electrode and the first common electrode includes a portion that does not overlap with the second common electrode in the display region of the subpixel.

Display device, module, and electronic device

To increase capacity per weight of a power storage device, a particle includes a first region, a second region in contact with at least part of a surface of the first region and located on the outside of the first region, and a third region in contact with at least part of a surface of the second region and located on the outside of the second region. The first and the second regions contain lithium and oxygen. At least one of the first region and the second region contains manganese. At least one of the first and the second regions contains an element M. The first region contains a first crystal having a layered rock-salt structure. The second region contains a second crystal having a layered rock-salt structure. An orientation of the first crystal is different from an orientation of the second crystal.

Particle, electrode, power storage device, electronic device, and method for manufacturing electrode

To increase the volume density or weight density of lithium ions that can be received and released in and from a positive electrode active material to achieve high capacity and high energy density of a secondary battery. A lithium manganese composite oxide represented by LiMnMOthat includes a region belonging to a space group C2/c and is covered with a carbon-containing layer is used as the positive electrode active material. The element M is an element other than lithium and manganese. The lithium manganese composite oxide has high structural stability and high capacity.

Lithium manganese composite oxide, secondary battery, electronic device, and method for forming layer

A lithium-ion secondary battery with high capacity is provided. Alternatively, a lithium-ion secondary battery with unproved cycle characteristics is provided. To achieve this, an active material including a particle having a cleavage plane and a layer containing carbon covering at least part of the cleavage plane is provided. The particle having the cleavage plane contains lithium, manganese, nickel, and oxygen. The layer containing carbon preferably contains graphene. When a lithium-ion secondary battery is fabricated using an electrode including the particle having the cleavage plane at least part of which is covered with the layer containing carbon as an active material, the discharge capacity can be increased and the cycle characteristics can be improved.

Lithium-ion secondary battery and electronic device

A lithium-ion secondary battery with high capacity is provided. Alternatively, a lithium-ion secondary battery with improved cycle characteristics is provided. To achieve this, an active material including a particle having a cleavage plane and a layer containing carbon covering at least part of the cleavage plane is provided. The particle having the cleavage plane contains lithium, manganese, nickel, and oxygen. The layer containing carbon preferably contains graphene. When a lithium-ion secondary battery is fabricated using an electrode including the particle having the cleavage plane at least part of which is covered with the layer containing carbon as an active material, the discharge capacity can be increased and the cycle characteristics can be improved.

To increase the amount of lithium ions that can be received in and released from a positive electrode active material to achieve high capacity and high energy density of a secondary battery. A lithium manganese oxide particle includes a first region and a second region. The valence number of manganese in the first region is lower than the valence number of manganese in the second region. The lithium manganese oxide has high structural stability and high capacity characteristics.

Lithium-manganese composite oxide and secondary battery

It is an object to provide a manufacturing method of a structure of a thin film transistor including an oxide semiconductor film, in which threshold voltage at which a channel is formed is positive and as close to 0 V as possible. A protective insulating layer is formed to cover a thin film transistor including an oxide semiconductor layer that is dehydrated or dehydrogenated by first heat treatment, and second heat treatment at a temperature that is lower than that of the first heat treatment, in which the increase and decrease in temperature are repeated plural times, is performed, whereby a thin film transistor including an oxide semiconductor layer, in which threshold voltage at which a channel is formed is positive and as close to 0 V as possible without depending on the channel length, can be manufactured.

Manufacturing method of semiconductor device

Manufactured is a transistor including an oxide semiconductor layer, a source electrode layer and a drain electrode layer overlapping with part of the oxide semiconductor layer, a gate insulating layer overlapping with the oxide semiconductor layer, the source electrode layer, and the drain electrode layer, and a gate electrode overlapping with part of the oxide semiconductor layer with the gate insulating layer provided therebetween, wherein, after the oxide semiconductor layer which is to be a channel formation region is irradiated with light and the light irradiation is stopped, a relaxation time of carriers in photoresponse characteristics of the oxide semiconductor layer has at least two kinds of modes: &#x3c4;and &#x3c4;, &#x3c4;&#x3c;&#x3c4;is satisfied, and &#x3c4;is 300 seconds or less. In addition, a semiconductor device including the transistor is manufactured.

Transistor and semiconductor device

To increase the amount of lithium ions that can be received and released in and from a positive electrode active material to achieve high capacity and high energy density of a secondary battery. A composite material of crystallites of LiMnO(crystallites with a spinel crystal structure) and crystallites of LiMnO(crystallites with a layered rock-salt crystal structure) is used as a positive electrode active material. The lithium manganese oxide composite has high structural stability and high capacity.

Lithium manganese oxide composite, secondary battery, and manufacturing method thereof

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Kanagawa, Japan

Shuhei Yoshitomi