摘要:
Configurations of a light signal communication apparatus and an optical communication system suitable for speeding-up of the transmission of information based on a light signal and an increase in the capacity for the information transmission are disclosed. On the light signal transmitting side, excitation light is supplied to an active medium in accordance with a transmission signal to cause induced emission within the active medium, thereby generating signal light. The excitation light causes spontaneously-emitted light to fall on a semiconductor layer, and a voltage pulse corresponding to transmission information is applied to modulate the refractive index of the semiconductor layer, thereby Bragg-reflecting a specific wavelength component, after which it is sent to the active medium as the excitation light. The Bragg reflection and induced emission incident to it exhibit excellent response to a voltage signal having a pulse width of 1×10−9 seconds or less. It is therefore possible to implement an optical communication system having a transmission rate up to 100 Gb/s with one light signal.
摘要:
In order to provide a semiconductor device having a field effect transistor with a low power consumption and a high speed by use of the combination of Si and an element such as Ge, C or the like of the same group as Si, a strain is applied by a strain applying semiconductor layer 2 to a channel forming layer I having a channel of the field effect transistor formed therein so that the mobility of carriers in the channel is made larger than the mobility of carriers in that material of the channel forming layer which is unstrained.
摘要:
An electronic apparatus employs a polycrystalline semiconductor thin film structure formed of an insulating substrate and a plurality of polycrystalline layers laminated on the insulating substrate. A plurality of transistors are formed at the surface of the polycrystalline semiconductor thin film structure, each transistor being formed in a region of one of a plurality of crystal grains disseminated on the surface of the polycrystalline layers. A number of crystal grains in each of the polycrystalline layers is gradually reduced from a lower layer to an upper layer.
摘要:
In order to provide a semiconductor device having a field effect transistor with a low power consumption and a high speed by use of the combination of Si and an element such as Ge, C or the like of the same group as Si, a strain is applied by a strain applying semiconductor layer 2 to a channel forming layer I having a channel of the field effect transistor formed therein so that the mobility of carriers in the channel is made larger than the mobility of carriers in that material of the channel forming layer which is unstrained.
摘要:
In order to provide a semiconductor device having a field effect transistor with a low power consumption and a high speed by use of the combination of Si and an element such as Ge, C or the like of the same group as Si, a strain is applied by a strain applying semiconductor layer 2 to a channel forming layer 1 having a channel of the field effect transistor formed therein so that the mobility of carriers in the channel is made larger than the mobility of carriers in that material of the channel forming layer which is unstrained.
摘要:
To provide TFT of improved low-temperature polycrystalline layer that has higher electron mobility and assures less fluctuation in manufacture in view of realizing a liquid-crystal display device having a large display area by utilizing a glass substrate. A TFT having higher electron mobility can be realized within the predetermined range of characteristic fluctuation by utilizing the semiconductor thin-film (called quasi single crystal thin-film) formed of poly-crystal grain joined with the {111} twin-boundary of Diamond structure as the channel region (namely, active region) of TFT.
摘要:
To provide TFT of improved low-temperature polycrystalline layer that has higher electron mobility and assures less fluctuation in manufacture in view of realizing a liquid-crystal display device having a large display area by utilizing a glass substrate.A TFT having higher electron mobility can be realized within the predetermined range of characteristic fluctuation by utilizing the semiconductor thin-film (called quasi single crystal thin-film) formed of poly-crystal grain joined with the {111} twin-boundary of Diamond structure as the channel region (namely, active region) of TFT.
摘要:
The present invention provides an apparatus having a semiconductor device including a plurality of transistors formed on respective single crystal silicon regions of enlarged grain size. On a polycrystalline silicon layer, projections at regular intervals are formed by using anisotropic etching and a photomask. The tips of projections are composed of single crystal silicon of a specific crystal orientation selectively left by the anisotropic etching, which is a candidate for nuclei of amorphous silicon to be deposited thereon. By iterating the above process a plurality of times, and by gradually enlarging the pitch, span, size and height of projections, the size of the crystal grains of silicon at the surface may be enlarged to the extent required. Thereby, silicon crystal grains of large grain size with the crystal orientation aligned may be formed at controllable positions.
摘要:
In order to provide a semiconductor device having a field effect transistor with a low power consumption and a high speed by use of the combination of Si and an element such as Ge, C or the like of the same group as Si, a strain is applied by a strain applying semiconductor layer 2 to a channel forming layer I having a channel of the field effect transistor formed therein so that the mobility of carriers in the channel is made larger than the mobility of carriers in that material of the channel forming layer which is unstrained.
摘要:
To provide TFT of improved low-temperature polycrystalline layer that has higher electron mobility and assures less fluctuation in manufacture in view of realizing a liquid-crystal display device having a large display area by utilizing a glass substrate.A TFT having higher electron mobility can be realized within the predetermined range of characteristic fluctuation by utilizing the semiconductor thin-film (called quasi single crystal thin-film) formed of poly-crystal grain joined with the {111} twin-boundary of Diamond structure as the channel region (namely, active region) of TFT.