Description:

Tiny washboard structures on polymer films will be useful for producing diffraction gratings, detectors, and a variety of microelectromechanical (MEMS) devices.  A polymer (PDMS) film is heated, exposed to an oxygen plasma (which creates a silica-like crust), and then cooled. The crust is under stress as it cools and so it must pucker, creating a system of waves on the surface.  Additional structures (5-microns-high, 30-micron-wide circles spaced 70 microns apart) on the PDMS surface help to order the smaller wave structures.

 

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