Touch panel

• US 20080026206A1
• Filed: 04/19/2007
• Published: 01/31/2008
• Est. Priority Date: 07/25/2006
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Matsumoto, Kenichi, Yamamoto, Yasutaka
• Application Number:
  US11/785,696
• Publication Number:
  US 20080026206A1
• Time in Patent Office: Days
• US Class Current: 428/327
• CPC Class Codes: C09J 2301/208 the adhesive layer being constituted by at least two or more adjacent or superposed adhesive layers, e.g. multilayer adhesive
• CPC Class Codes: C09J 7/29 Laminated material metallised plastics C09J7/22
• CPC Class Codes: C23C 28/00 Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• CPC Class Codes: Y10T 428/254 Polymeric or resinous material

Abstract

The invention presents a touch panel easy in peeling off and adhering to a display element. The touch panel of the invention forms a strong adhesive layer and a weak adhesive layer overlaid on the downside of a lower substrate. When peeling and adhering again the touch panel, it can be easily peeled off, and the weak adhesive layer does not transfer and stick to the display element.

Claims

1. A touch panel comprising:

a light transmitting upper substrate having an upper conductive layer formed at the downside;

a light transmitting lower substrate having a lower conductive layer formed at the upside, being opposite to the upper conductive layer across a specified interval;

a strong adhesive layer; and

a weak adhesive layer,

wherein the strong adhesive layer and weak adhesive layer are overlaid and formed on the downside of the lower substrate.

2. The touch panel of claim 1, wherein the weak adhesive layer is formed of a thermoplastic elastomer.