Electron beam column for three-dimensional printing device, three-dimensional printing device, and three-dimensional printing method

An electron beam column for a three-dimensional layering device comprising:

• a first electron source that has an anisotropically-shaped first electron emitting surface, and outputs a first electron beam accelerated to a first predetermined acceleration voltage;
• a second electron source that has an anisotropically-shaped second electron emitting surface, and outputs a second electron beam accelerated to a second predetermined acceleration voltage;
• a first beam shape deforming element that deforms a cross-sectional shape of the first electron beam;
• a second beam shape deforming element that deforms a cross-sectional shape of the second electron beam;
• an electromagnetic lens that converges the first electron beam and the second electron beam;
• and
• a deflector that adjusts irradiation positions of the first electron beam and the second electron beam, wherein
• the first electron source and the second electron source are oriented such that a longitudinal direction of the first electron emitting surface of the first electron source is orthogonal to a longitudinal direction of the second electron emitting surface of the second electron source, and
• a powder layer is irradiated with the first electron beam and the second electron beam simultaneously.