# US 10,118,377 B2 · Stereolithography system

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- Number: US 10,118,377 B2
- Document ID: US10118377B2
- Status: Granted
- Kind: B2
- Application number: 15/409,044
- Filed: 2017-01-18
- Published: 2017-05-11
- Granted: 2018-11-06
- Earliest claimed: 2015-04-30
- Assignees: Forcast Research & Development Corp.
- Applicants: Forcast Research and Development Corp.
- Inventors: Diego Castanon
- Web page: https://patentgrep.com/patent/US10118377B2

## CPC

- B29C 64/129: characterised by the energy source therefor, e.g. by global irradiation combined with a mask
- B29C 64/124: using layers of liquid which are selectively solidified
- B29C 64/245: Platforms or substrates (support structures intended to be sacrificed after manufacture B29C64/40)
- B29C 64/255: Enclosures for the building material, e.g. powder containers
- B33Y 30/00: Apparatus for additive manufacturing; Details thereof or accessories therefor
- B33Y 40/00: Auxiliary operations or equipment, e.g. for material handling
- G03F 7/0037: {Production of three-dimensional images}
- B29K 2105/0058: {Liquid or visquous}
- B33Y 10/00: Processes of additive manufacturing
- B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- G03F: PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR; (phototypographic composing devices B41B; photosensitive materials or processes for photographic purposes G03C; electrophotography, sensitive layers or processes therefor G03G)
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES

## Abstract

A stereolithography system comprises an emitting device and a tank disposed above the emitting device. The tank has a first optically transparent bottom wall and a second optically transparent bottom wall with a space disposed therebetween. There is a linear stage that extends away from the tank and a carrier platform is moveable along the linear stage away from the tank. There is also a wettable material at a bottom wall of the tank within the tank. A fluid cooling system is in fluid communication the space disposed between the first optically transparent bottom wall of the tank and the second optically transparent bottom wall of the tank.

## Claims

### Claim 1

A stereolithography system, comprising:
an emitting device;
a tank disposed above the emitting device, the tank having an optically transparent bottom wall;
a linear stage extending away from the tank and a carrier platform moveable along the linear stage away from the tank; and
a hydrogel overlaying the optically transparent bottom wall of the tank within the tank.

### Claim 2 (depends on 1)

The stereolithography system as claimed in claim 1 wherein the hydrogel further includes hydrogen peroxide.

### Claim 3 (depends on 1)

The stereolithography system as claimed in claim 1 wherein the hydrogel further includes a hydrogen donor and an oxygen scavenger.

### Claim 4 (depends on 1)

The stereolithography system as claimed in claim 1 wherein the hydrogel includes glycerin.

### Claim 5 (depends on 1)

The stereolithography system as claimed in claim 1 wherein the hydrogel includes a U V inhibitor.

### Claim 6 (depends on 1)

The stereolithography system as claimed in claim 1 wherein the hydrogel is coated on the optically transparent bottom wall of the tank.

### Claim 7 (depends on 1)

The stereolithography system as claimed in claim 1 wherein the hydrogel is a membrane that overlays the optically transparent bottom wall of the tank.

### Claim 8 (depends on 1)

The stereolithography system as claimed in claim 1 wherein the hydrogel is adhered to the optically transparent bottom wall of the tank using adhesive applied in a pattern having intersecting lines.

### Claim 9 (depends on 1)

The stereolithography system as claimed in claim 1 wherein a nanostructure of a surface of the hydrogel is a vertically aligned surface or a hierarchically structured surface, or a combination thereof.

### Claim 10 (depends on 1)

The stereolithography system as claimed claim 1 wherein a nanostructure of a surface of the hydrogel includes a plurality of projections which have a top diameter of between 5 microns and 15 microns and are spaced less than 10 microns apart.