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Dark film lamination for a touch sensor

  • US 9,448,666 B2
  • Filed: 06/08/2013
  • Issued: 09/20/2016
  • Est. Priority Date: 06/08/2013
  • Status: Active Grant
First Claim
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1. A touch sensor, comprising:

  • a touch surface;

    a first Optically Clear Adhesive (OCA) layer laminated to the touch surface, wherein the first OCA layer is shorter than the touch surface in one direction;

    a row film including row termination pads on a row end that are bonded to flex-tails that is laminated to the first OCA layer such that a darkened surface of the row film faces the touch surface, wherein the row film end extends outward in the one direction from the first OCA layer and overhangs the touch surface to define a gap between the row end of the row film and the touch surface for receiving the row termination pads bonded to the flex-tails and an Anisotropic Conductive Film (ACF) in the gap, wherein the ACF covers the row film termination pads prior to lamination, wherein the row end of the row film including the row termination pads and the flex-tails are non-adhered to the first OCA layer such that the row termination pads are exposed in the gap after the row film is laminated to the first OCA layer, and wherein the darkened surface is applied to a side of the row film where the row termination pads are bonded to the flex-tails;

    a second Optically Clear Adhesive (OCA) layer laminated to the row film, wherein the second OCA layer is shorter than the touch surface in an another direction, the one direction and the another direction being different; and

    a column film including column termination pads on a column end bonded to column flex-tails that is laminated to the second OCA layer, wherein the column end extends outward in the another direction.

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