Micron Technology Incorporated

Joel Ltd.

Jeol Ltd.

Yuhei Kaneko

Kohei Nakamura

Takashi Sato

Nari Tsutagawa

Yohei Daino

Kozo Koiwa

Masahiko Kawakami

An apparatus includes a build plate, a powder application apparatus that applies metal powder onto the build plate to form a powder layer, a beam irradiation apparatus that irradiates the powder layer with an electron beam, and a control unit that controls the powder application apparatus and the beam irradiation apparatus. When the powder layer is preheated by irradiation with the electron beam, the control unit sets a beam size and an irradiation position of the electron beam such that lines of the electron beam do not overlap each other at least at a start of preheating, and controls the beam irradiation apparatus to gradually increase at least one of a beam current and the beam size of the electron beam from the start of preheating to an end of preheating.

Three-dimensional powder bed fusion additive manufacturing apparatus and three-dimensional powder bed fusion additive manufacturing method

An impedance adjustment circuit includes a counter circuit outputting a count value thereof as a plurality of first impedance adjustment signals, a mode selection circuit setting a second impedance adjustment signal to be in an active/inactive state irrespective of the count value, and a level fixing circuit fixing a third impedance adjustment signal to be in an active state. A pre-stage circuit generates a plurality of first output control signals, a second output control signal, and a third output control signal in response to the first impedance adjustment signals, the second impedance adjustment signal, and the third impedance adjustment signal, respectively, and a data signal. An output circuit includes a plurality of first transistors, a second transistor, and a third transistor connected in parallel to each other between an output terminal and a first power supply wiring. Control terminals of the first transistors, the second transistor, and the third transistor receive the first output control signals, the second output control signal, and the third output control signal, respectively.

Semiconductor device and method for adjusting impedance of output circuit

Growing community of inventors

Tokyo, Japan

Yuhei Kaneko