Micro-Contact Printing and Nano-Imprint-Lithography to be done with PDMS stamps on µ-CP3.0 and PVM-A.
|How to transfer tiny features from a planar surface to another one? The GeSiM Micro-Contact Printers feature PDMS (Polydimethylsiloxane) stamps.|
With gas pressure inside, the print head rises and the membrane is bulged out, like a balloon. For printing, this "balloon" is slowly moved towards the substrate until the entire membrane is in contact with the surface.
|Finally each position of the stamp contacts the corresponding position of the target reproducibely, at well defined pressure, without air bubbles and voids.|
The semielastic PDMS stamps are reusable. On the other hand, the soft material is subject to a certain degradation over the time. The automatick pick-and-place mechanism of µ-CP3.0 and PVM-A enables the quick replacement of the stamp in order to avoid cross contamination when working with different samples.
Fresh stamps are available from the casting station (delivered with µ-CP3.0 and PVM-A). It comprises a set of tools and consumables, e.g. the liquid PDMS, keeping the operational costs at an affordable level. Your uniqe layout is etched into a silicon master chip . Typical microfluidic layouts are available off the shelf. Please ask.
|Insertion of the silicon master chip||Stamp holder (Polycarbonate) and a PMMA plug close the molding chamber above the master chip||Injection of the liquid PDMS; hardening||Removal of the PMMA plug|
Stamp is ready - What's next?
|Placing of stamp(s) and substrate(s) on the instrument|
|2D µ-CP print process||3D NIL stamp process|
|Alignment stamp#1 to the substrate||Dispense of NIL-resist|
|Print run #1||Stamp run #1|
|Alignment stamp#2 to the substrate||Resist curing with UV-light|
|Print run #2||2nd dispene of NIL resist|
|....||Stamp run #2|
|Resist curing with UV-light||Res 600x450px video, More details|