NANOIMPRINTING

nanoimprinting

Winovus is at the forefront of nanofabrication capabilities. We offer various nano-structuring technology including nanoimprinting , nanoinjection molding and customised nanopatterned mold fabrication.

Nanoimprinting is a cost-efficient alternative to conventional lithographic technology. We use nanoimprinting manufacturing technology to replicate micro- or nanometer-scale patterns from the high-resolution molds to the surface of a base substrate. The nanometer-scale design can be of resolution as high as 50nm (One-nanometer nm is one-billionth of a meter). We nanoimprint directly onto thermoplastic or polymer film, or on the resin which is bonded onto a rigid substrate. The rigid substrate can be a glass substrate, silicon wafer or other materials.

Nanoimprintining is a high precision, cost-effective and high throughput replication technology. The micro-and nanostructures imprinted on the flexible and rigid substrate can generate multivariate functionalities. Functionalities include super hydrophobicity, super hydrophilicity, anti-reflective with high optical transmission, anti-fogging with anti-UV transmission, etc.

Functional applications of nanoimprinting include patterned sapphire substrate for LED, sensors, solar cells, optics, microarray lens, microfluidic chips, sensors, augmented reality (AR) and virtual reality (VR) lenses, flexible display and biomedical devices.

Applications of Nanoimprinting

Display Optics Anti-Counterfeit
Functions
  • Anti-reflective
  • High transmission structures
  • Micro-lens array
  • Diffractive optical element,
  • Diffraction gratings
  • Plasmonic colours structure
  • Holographic
  • Iridescent
Applications
  • Automotive display for dashboard
  • Solar cell panel
  • Tablets and mobile touchscreen display
  • LEDs (nPSS & PhC)
  • Photovoltaics for solar cell
  • Wire grid polarizer
  • 3D sensing
  • Augmented Reality (AR)
  • Head-up Display (HUD) for
    automotive
  • OLED display
  • Flat optics
  • Labelling, holograms
  • QR codes
  • Banknotes
  • Security features in passports

Nano-imprinting’s value-proposition

  • Cost-performance advantage
  • Eliminate the need for complex optical coating
  • High resolution, fast processing speed and high throughput
  • Compatibility with diverse materials.

Other nanoimprinting applications and markets include:

  • Micro-arrays for genomics
  • anti-reflective optics
  • Deflective optics and grating
  • Surface-relief gratings
  • Virtual & Augmented Reality optics
  • Medical equipment & Biotech optics
  • Anti-reflection imprinted display
  • Creating colors with plasmonic nanostructures
  • 3D Sensors

More on Nanoimprinting

What is Nanoimprinting?
Scaling up Nanoimprinting
Nanoimprinting process on a glass substrate
Mold fabrication
  • Master Mold fabrication
  • Nickel Electroforming
Cleaning
  • Glass substrate cleaning via oxygen plasma treatment
Substrate priming stage
  • Coating on glass substrate with primer resin to promote good adhesion
Nanoimprinting station
  • Puddle dispensing of UV-Resin
  • UV nanoimprinting
Coating
  • Imprinted chips are coated with diamond-like-carbon (DLC) coating for scratch and chemical resistance.
Final inspection
  • All samples are inspected for dimensional stability
Thermal nanoimprinting process on a polymer substrate
Mold fabrication
  • Master Mold fabrication
  • Nickel Electroforming
Cleaning
  • Plastic substrate cleaning via oxygen plasma treatment
Nanoimprinting
  • Direct Thermal embossing onto the plastic substrate
Coating
  • Imprinted chips are coated with diamond-like-carbon (DLC) coating for scratch and chemical resistance.
Final inspection
  • All samples are inspected for dimensional stability

Thermal nanoimprinting ( also known as hot embossing) is a replication method used to imprint nanostructures directly on the surface of a polymer substrate. Amorphous and semi-crystalline thermoplastics are used for thermal nanoimprinting. They include polycarbonate (PC), polymethyl methacrylate (PMMA), polyethene (PE), polystyrene (PS), polypropylene (PP). Nanostructures with dimensions ranging from 100nm to hundreds of microns can be imprinted.

Examples of nanoimprinted structures

3um & 5um +ve grating

3um & 5um -ve polarity grating

3um +ve polarity grating

3um -ve polarity grating

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