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Hybrid Design for Organic Electroluminescent Devices

IP.com Disclosure Number: IPCOM000118936D
Original Publication Date: 1997-Sep-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Related People

Haskal, E: AUTHOR

Abstract

A procedure for making Organic Electroluminescent Devices (OLEDs) on opaque substrates involves using an anisotropically conductive adhesive to attach an OLED which has been manufactured on glass (or any transparent substrate) to an opaque substrate which has been patterned with metal contact pads.

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Hybrid Design for Organic Electroluminescent Devices

      A procedure for making Organic Electroluminescent Devices
(OLEDs) on opaque substrates involves using an anisotropically
conductive adhesive to attach an OLED which has been manufactured on
glass (or any  transparent substrate) to an opaque substrate which
has been patterned  with metal contact pads.

      Normally, OLEDs are manufactured with the structure:
Glass/transparent anode/organic films/opaque metal cathode (1).  Upon
applying a voltage, these devices emit light which is observed
through the transparent anode and glass substrate.  However, making
an OLED on an opaque substrate is not straightforward, since no light
will be observed through the substrate or the opaque top cathode.
Therefore, a  hybrid manufacturing design for OLEDs is presented.

      The simplest embodiment of this design is to manufacture an
OLED on a glass substrate in the standard configuration (1).  A thin,
anisotropically conductive bonding material, such as an electrically
conductive pressure sensitive adhesive with a low volume resistivity
and high resistivity along the surface of the tape (such as Arclad
8257*), is then applied to the top metal cathode.  This adhesive tape
allows current to flow through it in the Z-direction (indicated in
the Figure) but not along its surface.  The OLED/adhesive material
combination is then stuck to the opaque substrate.  This opaque
substrate might be as simple as an array of...