Title:
DEFORMABLE FERROFLUID LAYER DEVICES FOR OPTICAL MODULATION AND MICROMOLDING
Document Type and Number:
WIPO Patent Application WO/2011/055347
Kind Code:
A3
Abstract:
The invention is directed to a device (10, 10a - 10d) comprising: a set of on- chip circuits (110 - 160, 170, 180), each of the circuits configured to generate a magnetic field (300) perpendicular to a planar surface of the set when energized; a ferrofluidic layer (40) interfaced to the planar surface; and a logic circuit (50) configured to selectively energize (200, 200a) one ore more circuits of the set such as to generate a magnetic field at the energized circuits and a deformation (41, 44, 45) of the ferrofluidic layer in response thereto and to modulate optical beams (IR1, IR2) directed to the ferrofluid layer. Preferably, an additional liquid layer (60) is interfaced to the ferrofluid layer, opposite to the on-chip circuits, which is not miscible with the ferrofluid layer. The invention can be applied to micro- display/projection devices, programmable optical reflecting lenses, or to micro- molding applications for surface replication.
Inventors:
LAMPRECHT TOBIAS P (CH)
MORF THOMAS E (CH)
WEISS JONAS R (CH)
MORF THOMAS E (CH)
WEISS JONAS R (CH)
Application Number:
PCT/IB2010/055063
Publication Date:
June 30, 2011
Filing Date:
November 08, 2010
Export Citation:
Assignee:
IBM (US)
LAMPRECHT TOBIAS P (CH)
MORF THOMAS E (CH)
WEISS JONAS R (CH)
LAMPRECHT TOBIAS P (CH)
MORF THOMAS E (CH)
WEISS JONAS R (CH)
International Classes:
G02B26/02; B29C33/00; B29D11/00; G02B3/00; G02B26/08; G02F1/01; G09F9/37
Domestic Patent References:
| WO2005027185A2 | 2005-03-24 |
Foreign References:
| US20040190000A1 | 2004-09-30 |
Other References:
MARTIN FREY: "SnOil - Ein plastisches Display basierend auf Ferrofluid", 23 February 2008 (2008-02-23), XP002619671, Retrieved from the Internet [retrieved on 20110201]
CARDOT F ET AL: "Fabrication of a magnetic transducer composed of a high-density array of microelectromagnets with on-chip electronics", SENSORS AND ACTUATORS A, ELSEVIER SEQUOIA S.A., LAUSANNE, CH, vol. 43, no. 1-3, 1 May 1994 (1994-05-01), pages 11 - 16, XP026615703, ISSN: 0924-4247, [retrieved on 19940501], DOI: DOI:10.1016/0924-4247(93)00652-K
COTTER L K ET AL: "Ferroelectric-liquid-crystal/silicon-integrated-circuit spatial light modulator", OPTICS LETTERS USA, vol. 15, no. 5, 1 March 1990 (1990-03-01), pages 291 - 293, XP002619670, ISSN: 0146-9592
SONG W-B ET AL: "Fabrication of Polymeric 3-D Micro-Structures Using Ferrofluid Molds", MICRO ELECTRO MECHANICAL SYSTEMS, 2006. MEMS 2006 ISTANBUL. 19TH IEEE INTERNATIONAL CONFERENCE ON ISTANBUL, TURKEY 22-26 JAN. 2006, PISCATAWAY, NJ, USA,IEEE, 22 January 2006 (2006-01-22), pages 334 - 337, XP010914250, ISBN: 978-0-7803-9475-9, DOI: DOI:10.1109/MEMSYS.2006.1627804
CARDOT F ET AL: "Fabrication of a magnetic transducer composed of a high-density array of microelectromagnets with on-chip electronics", SENSORS AND ACTUATORS A, ELSEVIER SEQUOIA S.A., LAUSANNE, CH, vol. 43, no. 1-3, 1 May 1994 (1994-05-01), pages 11 - 16, XP026615703, ISSN: 0924-4247, [retrieved on 19940501], DOI: DOI:10.1016/0924-4247(93)00652-K
COTTER L K ET AL: "Ferroelectric-liquid-crystal/silicon-integrated-circuit spatial light modulator", OPTICS LETTERS USA, vol. 15, no. 5, 1 March 1990 (1990-03-01), pages 291 - 293, XP002619670, ISSN: 0146-9592
SONG W-B ET AL: "Fabrication of Polymeric 3-D Micro-Structures Using Ferrofluid Molds", MICRO ELECTRO MECHANICAL SYSTEMS, 2006. MEMS 2006 ISTANBUL. 19TH IEEE INTERNATIONAL CONFERENCE ON ISTANBUL, TURKEY 22-26 JAN. 2006, PISCATAWAY, NJ, USA,IEEE, 22 January 2006 (2006-01-22), pages 334 - 337, XP010914250, ISBN: 978-0-7803-9475-9, DOI: DOI:10.1109/MEMSYS.2006.1627804
Attorney, Agent or Firm:
RAGOT, Sébastien et al. (IBM Research - ZurichIntellectual Property La, Säumerstrasse 4 Rüschlikon, CH)
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