# US 11,305,482 B2 · Continuous and scalable 3D nanoprinting

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- Number: US 11,305,482 B2
- Document ID: US11305482B2
- Status: Granted
- Kind: B2
- Application number: 15/652,105
- Filed: 2017-07-17
- Published: 2018-01-18
- Granted: 2022-04-19
- Earliest claimed: 2016-07-15
- Assignees: Purdue Research Foundation
- Applicants: Purdue Research Foundation
- Inventors: Xianfan Xu; Bryan William Boudouris; Liang Pan
- Web page: https://patentgrep.com/patent/US11305482B2

## CPC

- B29C 64/129: characterised by the energy source therefor, e.g. by global irradiation combined with a mask
- B29C 64/135: the energy source being concentrated, e.g. scanning lasers or focused light sources
- B29C 64/245: Platforms or substrates (support structures intended to be sacrificed after manufacture B29C64/40)
- B29C 64/268: using laser beams; using electron beams [EB]
- B33Y 10/00: Processes of additive manufacturing
- B33Y 30/00: Apparatus for additive manufacturing; Details thereof or accessories therefor
- 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

## Abstract

A rapidly printing 3D nanostructures arrangement, comprising a first photonic source configured to provide photoinitiation energy to a polymer medium via a dynamic light spatial modulator to an excited state to initiate polymerization, a second photonic source configured to selectively provide inhibition energy to the polymerized medium to a depleted state to inhibit polymerization thereby generating a dead zone below a growth zone, the dead zone allows continuous 3D polymerization.

## Claims

### Claim 1

A rapidly printing 3D nano structures arrangement, comprising:
a first photonic source configured to provide photoinitiation energy to a polymer medium via a dynamic light spatial modulation member that directs the photoinitiation energy through a focusing device included on a window, wherein the focusing device projects a photo initiation beam onto the polymer medium and brings the polymer medium to an excited state to initiate polymerization; and
a second photonic source configured to selectively provide nanoscale light energy confinement and light intensity enhancement to provide inhibition energy to the polymerized medium,
wherein an inhibition beam from the second photo light source is directed through the window without passing through the focusing device included on the window, wherein the inhibition beam brings the polymer medium to a depleted state to inhibit polymerization thereby generating a nanoscale dead zone below a growth zone,
wherein the dead zone allows continuous 3D polymerization, wherein the dead zone forms a surface plasmonic field.

### Claim 2 (depends on 1)

The rapidly printing 3D nanostructures arrangement of claim 1, the first and second photonic sources are applied to the polymer medium at substantially different angles.

### Claim 3 (depends on 1)

The rapidly printing 3D nanostructures arrangement of claim 1, wherein the focusing device comprises an array of lenses, wherein photo initiation beams of a plurality of photonic sources pass through the array of lenses prior to being projected on to the polymer medium.

### Claim 4 (depends on 3)

The rapidly printing 3D nanostructures arrangement of claim 3, wherein the array of lenses comprises an array of Fresnel zone plates.