Vertical electrostatically 90° turning flaps for reflective MEMS display

Fabio Jutzi; Wilfried Noell; Nico F. de Rooij

doi:10.1117/12.873840

14 February 2011 Vertical electrostatically 90° turning flaps for reflective MEMS display

Fabio Jutzi, Wilfried Noell, Nico F. de Rooij

Proceedings Volume 7930, MOEMS and Miniaturized Systems X; 79300H (2011) https://doi.org/10.1117/12.873840
Event: SPIE MOEMS-MEMS, 2011, San Francisco, California, United States

Abstract

A new kind of MEMS reflective display is being developed having high contrast and reflectivity, better than on printed paper. The system is based on novel vertical flaps, which can be electrostatically turned by 90° to horizontal position. After fabrication, the poly-silicon flaps are vertical to the wafer surface and on the top suspended by torsion beams. In this state the pixel is black, incoming ambient light passes by the flaps and is absorbed by an underlying absorptive layer. When the flaps are turned to horizontal position light is reflected back and the pixel gets white. A self-aligning four masks bulk microfabrication process is employed, which uses poly-silicon filling of high aspect-ratio cavities. Parylene was also employed as flap material. Thanks to auto stress-compensation the flaps are not deformed due to intrinsic stresses. Low actuation voltages down to 20V can be achieved.

Citation Download Citation

Fabio Jutzi, Wilfried Noell, and Nico F. de Rooij "Vertical electrostatically 90° turning flaps for reflective MEMS display", Proc. SPIE 7930, MOEMS and Miniaturized Systems X, 79300H (14 February 2011); https://doi.org/10.1117/12.873840

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available