Batch fabrication method of three-dimensional photonic microstructures

Patent metadata

Field	Value
Publication number	US-9459381-B2
Application number	US-201514635186-A
Country	US
Kind code	B2
Filing date	Mar 2, 2015
Priority date	Mar 3, 2014
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

Provided is a batch fabrication method of three-dimensional photonic microstructures including a support structure fabricating step, a variable structure fabricating step, a thermal reflow step, and a three-dimensional photonic microstructure forming step. The batch fabrication method of three-dimensional photonic microstructures fabricates three-dimensional photonic microstructures having several shapes depending on a demand of a user through these steps.

First claim

What is claimed is:

1. A batch fabrication method of three-dimensional photonic microstructures, the method comprising:
a support structure fabricating step of disposing support structures protruding upwardly from a surface of a substrate;
a variable structure fabricating step of disposing variable structures on the surface of the substrate between neighboring support structures, each of the variable structures, one side of which contacts one of the neighboring support structures and the other side of which does not contact the other one of the neighboring support structures, the variable structures being made of a material of which shape is changed by thermal energy;
a thermal reflow step of applying heat to the substrate; and
a three-dimensional photonic microstructure forming step of forming three-dimensional photonic microstructures by changing shapes of the variable structures by the thermal reflow step.

2. The batch fabrication method of three-dimensional photonic microstructures of claim 1 , wherein shapes of the fabricated three-dimensional photonic microstructures are adjusted by adjusting one or more selected among variables including widths, heights, shapes, dispositions, and annealing temperatures of the support structures and the variable structures.

3. The batch fabrication method of three-dimensional photonic microstructures of claim 2 , wherein shapes of surfaces of the fabricated three-dimensional photonic microstructures are adjusted so as to be concave, flat, or convex depending on a height ratio of the variable structures and the support structures.

4. The batch fabrication method of three-dimensional photonic microstructures of claim 1 , further comprising, after the support structure fabricating step, a surface treating step of adjusting surface energy of the substrate, whereby the shapes of the variable structures of the fabricated three-dimensional photonic microstructures are adjusted depending on an adjustment level of the surface energy.

5. The batch fabrication method of three-dimensional photonic microstructures of claim 1 , wherein a support structure base is disposed on the substrate in such a manner as to connect bottoms of the support structures to the support structure base.

6. The batch fabrication method of three-dimensional photonic microstructures of claim 1 , further comprising, after the three-dimensional photonic microstructure forming step,
a mold fabricating step of fabricating a mold of the formed three-dimensional photonic micro structures;
a filling step of filling a filling material in the mold fabricated by the mold fabricating step to mold the three-dimensional photonic microstructures;
a curing step of curing the filling material by applying ultraviolet or heat to the filling material; and
a separating step of separating the three-dimensional photonic microstructures molded by the curing step from the mold.

7. The batch fabrication method of three-dimensional photonic microstructures of claim 1 , wherein shapes of the three-dimensional photonic microstructures are adjusted by performing an etching process using the three-dimensional photonic microstructures as a mask.

Assignees

• Korea Advanced Inst Sci & Tech

Inventors

• Jeong Ki-Hun
• Kim Jae-Jun
• Keum Dongmin

Classifications

• G02B3/00

  Simple or compound lenses · CPC title

• G03F7/0005

  Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor · CPC title

• B81C99/0085

  using moulds and master templates, e.g. for hot-embossing · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• G02B1/005

  made of photonic crystals or photonic band gap materials (photonic band-gap structures or photonic lattices in integrated optics G02B6/1225; photonic band-gap structures or photonic lattices in optical fibres G02B6/02295) · CPC title