Microfluidic Manufacturing Technique: What is Hot Embossing?

Posted By Borja Barredo / Technology Blog / Lab on a Chip, microfluidic chip, microfluidics / No hay comentarios

Microfluidic Manufacturing Technique:  Hot Embossing for Microfluidics

Hot Embossing technique used in microfluidics is a prototype and production method for creating microfluidic structures.

The first step is to create the SU8 mold of the structures you want to stamp in the polymer chip. The resolution you want to get is based on the mould, so the mask to choose is a key element. Resolutions of structures under 10 micron, a chromium mask is needed.

Microfluidic Structures to be replicated

Microfluidic Structures to be replicated

 

Once the mold is defined and manufacture, the hot embossing process starts. The temperature to reach is very important here. The objective is to get  a certain temperature in the process, where the material (a polymer) reaches the glass transition temperature(called Tg and is different for each polymer)

At this temperature the polymer is very “malleable”, so you can set and replicate the SU8 structures of the mould in the polymer.

Once you cool the material above the Tg Temperature it becomes hard and is alike the glass.

With this technique you are able to replicate complicated microfluidic structures in the different materials(polymers) we use, and create different designs/ microfluidic chip from one mold.

 

 

 

 

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Microfluidic Manufacturing technologies

Posted By Borja Barredo / Technology Blog / Lab on a Chip, microfluidic chip, microfluidics / No hay comentarios

Microfluidic Chips Manufacturing Technologies

microLIQUID uses several technologies for the fabrication of microfluidic structures in prototypes and serial production of microfluidic flexible chips.

For Microfluidic structures

Photolithography.
Hot Embossing.
Etching (Wet and dry).
Breaking and Dicing.
Bonding (thermal and anodic), we bond any polymer or substrate.
Flexible chips.

For Serial production

Injection molding.

CNC Micromachining.

For Integrated electrodes

  • Metal deposition via sputtering.
  • Metal deposition via vaporization.

For Chip holders:  microfluidic connectors

Stereolithography.
Injection molding.
CNC Micromachining.

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Microfluidics: What is the correct material?

Posted By Borja Barredo / Technology Blog / Lab on a Chip, microfluidic chip, microfluidics / No hay comentarios

Microfluidics Applications: Materials for different utilization

In microLIQUID we mainly use polymer materials in our product development and also glass and metals. We use them to fabricate microfluidic chips,different architectures,Integrate electrodes on microfluidic structures and Connectors (Microfluidic Chip holders).

Microfluidic structures

  • SU-8:Very precise and a good solution for prototypes.
  • COP or COC: Very good characteristics for health applications.
  • PMMA or Plexiglass clean room microfluidics.
  • PC: polycarbonate.
  • PDMS: Polydimethylsiloxane.
  • Substrates of Glass, silicon or your own processed wafers.

Integrate electrodes on microfluidic structures

  • Gold.
  • Platinum.
  • Titanium.
  • Chromium.
  • Copper.
  • Aluminium.
  • Nickel.

microLIQUID integrates metallic structures on SU8, COP, COC, PDMS, silicon and glass.

Connectors (Chip holders)

  • Plastic.
  • Metal.

The connectors have electrical connexion via Standard PCB(Printed circuit Boards).

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