Touch panel with a transparent electrically conductive polymer film and manufacturing process

• US 20080042996A1
• Filed: 04/12/2007
• Published: 02/21/2008
• Est. Priority Date: 08/21/2006
• Status: Abandoned Application

• Current Assignee: Fujitsu Component Limited (Fujitsu Limited)
• Original Assignee: Fujitsu Component Limited (Fujitsu Limited)
• Inventors: Nishimura, Koji, Nakajima, Takashi, Endo, Michiko, Endo, Norio
• Application Number:
  US11/783,869
• Publication Number:
  US 20080042996A1
• Time in Patent Office: Days
• US Class Current: 345/176
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A touch panel according to the present invention is constructed such that a transparent substrate coated with a transparent electrically conductive film and having dot spacers formed on top thereof, and a polarizing plate coated with a transparent electrically conductive polymer on a side thereof facing the transparent substrate, are disposed opposite each other with a prescribed space provided therebetween. As a result, the manufacturing process of the touch panel having such a polarizing plate is greatly simplified and a transparent electrically conductive film having an excellent mechanical strength can be formed as the transparent electrically conductive film of the touch panel.

Claims

1. A touch panel constructed such that a transparent substrate coated with a transparent electrically conductive polymer and having dot spacers formed on top thereof, and a polarizing plate coated with a transparent electrically conductive polymer on a side thereof facing said transparent substrate, are disposed opposite each other with a prescribed space provided therebetween.

2. A touch panel as claimed in claim 1, wherein said polarizing plate includes a phase retardation plate coated with a transparent electrically conductive polymer.

3. A touch panel manufacturing process comprising the step of fabricating an upper transparent substrate by coating a polarizing plate with a transparent electrically conductive polymer.

5. A touch panel manufacturing process as claimed in claim 3, further comprising the steps of:

radiating an excimer laser over a protective film surface on which said electrically conductive polymer is to be applied by printing; and

applying a coating of said electrically conductive polymer.

6. A touch panel manufacturing process as claimed in claim 3, further comprising the step of forming an undercoat with binder particles dispersed in a transparent resin, as a base treatment for formation of said electrically conductive polymer.

4. A touch panel manufacturing process comprising the steps of:

coating a protective film with an electrically conductive polymer; and

fabricating an upper transparent substrate by bonding said electrically conductive polymer-coated protective film, a polarizing film, and a protective film which is different from said polymer-coated protective film, one on top of another.

7. A touch panel manufacturing process as claimed in claim 4, further comprising the steps of:

radiating an excimer laser over a protective film surface on which said electrically conductive polymer is to be applied by printing; and

applying a coating of said electrically conductive polymer.

8. A touch panel manufacturing process as claimed in claim 4, further comprising the step of forming an undercoat with binder particles dispersed in a transparent resin, as a base treatment for formation of said electrically conductive polymer.