Manufacturing method of microstructure, manufacturing method and manufacturing device of electronic device
View Patent ↗Minute structures are obtained by exposing a process target material and changing the shape thereof by relatively shifting a laser beam or electron beam against the process target material and simultaneously repeating irradiation in an intermittent manner. A plurality of minute convex or concave shapes are formed on the process target material by employing a branching element for branching a single beam into a plurality of beams; a parallel element for converting said plurality of beams into beams which respectively advance in parallel; and a condensing element for condensing the plurality of beams to the process target material and generating a plurality of minute spots thereon.
1. A manufacturing device which forms a microstructure by irradiating a laser beam to a process target material, said manufacturing device of a microstructure comprising:
a beam source for generating a laser beam;
a modulator for intermitting said laser beam;
branching means for branching the modulated beam into a plurality of beams;
condensing means for condensing and interfering said plurality of beams in order to generate a spot set formed of a plurality of minute spots on said process target material;
an optical bench on which the condensing means is mounted; and
a turntable on which the process target material is located,
the optical bench and turntable being movable relative to each other,
wherein by controlling the optical bench and turntable, an irradiation trace is formed by irradiating said spot set a plurality of times while changing an irradiation position of the spot set against the process target material, and
wherein by controlling the optical bench and the turntable, multilayer exposure is performed by overlapping a part of a plurality of irradiation traces pursuant to a single spot set and a part of a plurality of irradiation traces pursuant to another spot set.
2. A manufacturing device of a microstructure according to claim 1 , further comprising parallel means for making said plurality of branched beams to be mutually parallel beams and entering said beams into said condensing means.
3. A manufacturing device of a microstructure according to claim 2 , wherein said parallel means is a blazed diffraction grating which positions a reference point of a substrate at the center position of a spot pattern formed on the surface of the diffraction grating pursuant to the passage of said plurality of beams, and disposes each grating area in correspondence with said plurality of beams around such reference point.
4. A manufacturing device of a microstructure according to claim 1 , wherein said branching means is a phase diffraction grating including a plurality of t phase shift areas having different phase shift quantities against said single beam.
5. A manufacturing device of a microstructure according to claim 4 , wherein when the number of the phase shift areas is given as Q, the maximum phase difference arising mutually between the beams which passed through different phase shift areas is made to be 2π(Q−1)/Q.