Kyocera Corporation

Yutaka Kuba

Katsuaki Masaki

Chiaki Domoto

Daisuke Ueyama

Yuuichiro Hayashi

Kouji Miyamoto

Shinichi Abe

Yuji Kishida

Takahiro Matsubara

Ryuji Komeda

Yuichiro Hayashi

A method of producing a crystal includes a step of preparing a solution containing carbon and a silicon solvent, and a seed crystal of silicon carbide; a step of contacting a lower face of the seed crystal with the solution; a step of raising a temperature of the solution to a first temperature zone; a step of relatively elevating the seed crystal with respect to the solution in a state where a temperature of the solution is being lowered from the first temperature zone to a second temperature zone; a step of raising a temperature of the solution from the second temperature zone to the first temperature zone; and a step of relatively elevating the seed crystal with respect to the solution in a state where a temperature of the solution is being lowered from the first temperature zone to the second temperature zone.

Method of producing crystal

A method for producing a crystal, according to the present invention, where the lower surfaceB of a seed crystalwhich is rotatably arranged and made of silicon carbide is brought into contact with a solutionof silicon solvent containing carbon in a cruciblewhich is rotatably arranged and the seed crystalis pulled up and a crystal of silicon carbide is grown from the solutionon the lower surfaceB of the seed crystalcomprising the steps of bringing the lower surfaceB of the seed crystalinto contact with the solutionin a contact step, rotating the seed crystalin a seed crystal rotation step, rotating the cruciblein a crucible rotation step, and stopping rotation of the cruciblewhile the seed crystalis rotated in the state in which the lower surfaceB of the seed crystalis in contact with the solutionin a deceleration step.

Method for producing crystal

A seed crystal holder according to the present invention for growing a crystal by a solution method, and that includes a seed crystal made of silicon carbide; a holding member above the seed crystal; a bonding agent configured to fix the seed crystal and the holding member; and a sheet member made of carbon which is interposed in the bonding agent in a thickness direction, and which has an outer periphery smaller than an outer periphery of the seed crystal in a plan view.

Seed crystal holder for growing a crystal by a solution method

A method for producing a crystal, according to the present invention, where the lower surface of a seed crystal which is rotatably arranged and made of silicon carbide is brought into contact with a solution of silicon solvent containing carbon in a crucible which is rotatably arranged and the seed crystal is pulled up and a crystal of silicon carbide is grown from the solution on the lower surface of the seed crystal, comprising the steps of bringing the lower surface of the seed crystal into contact with the solution in a contact step, rotating the seed crystal in a seed crystal rotation step, rotating the crucible in a crucible rotation step, and stopping rotation of the crucible, while the seed crystal is rotated in the state in which the lower surface of the seed crystal is in contact with the solution, in a deceleration step.

An electroluminescent device includes a first optical output part having a light-emitting layer emitting a light ray of a first color, a second optical output part having a light-emitting layer emitting a light ray of a second color, and a third optical output part having a light-emitting layer emitting a light ray of a third color, the colors being different from one another. Each of the optical output parts also has a resonator structure that resonates the light ray emitted from the light-emitting layer. In each optical output part, a resonant peak wavelength indicating a peak value of a transmission spectrum of light transmitted through the resonator structure in a direction perpendicular to a main surface of the light-emitting layer is on a longer or shorter wavelength side of an emission peak wavelength indicating a peak value of an emission spectrum of the light ray emitted by the light-emitting layer.

Electroluminescent device

An optical module includes a flat substrate, an electric connection terminal provided on the substrate, an optical element provided on the substrate, the optical element being connected with the electric connection terminal, and one end of a slender light transmitted fixed on the substrate and optically coupled with the optical element. The electric connection terminal is connectable with an external connector. The connector (or socket) is first mounted on an electric circuit board by reflow soldering or the like, and then the optical module having the slender light transmitter (or optical fiber) is electrically connected with the connector.

Optical module and connecting construction for optical module

An optical coupler wherein on one principal face of an Si single crystal substrate are formed, by etching, grooves for mounting optical fibers and a portion for mounting an optical element that is divided into plural parts, a base substrate, of which coefficient of thermal expansion is substantially identical to that of the optical element, is bonded onto the other principal face of the substrate, and the optical element is mounted on the portion for mounting an optical element.

Growing community of inventors

Kyoto, Japan

Yutaka Kuba