Touch sensor

Patent metadata

Field	Value
Publication number	US-10624207-B2
Application number	US-201816488132-A
Country	US
Kind code	B2
Filing date	Mar 8, 2018
Priority date	Mar 14, 2017
Publication date	Apr 14, 2020
Grant date	Apr 14, 2020

Abstract

A touch sensor of this disclosure includes: a printed circuit board having a connection terminal; a substrate portion having a mounting portion on which the printed circuit board is mounted; a conductive layer disposed on the mounting portion of the substrate portion; and an adhesive agent connecting the connection terminal and the conductive layer to each other. A plurality of linear projections arranged in a first direction and extending in a second direction intersecting with the first direction are disposed on a surface of the substrate portion at the mounting portion, and the conductive layer is disposed on a groove portion positioned between the linear projections disposed adjacently to each other out of the plurality of linear projections.

First claim

The invention claimed is:

1. A touch sensor comprising:
a printed circuit board having a connection terminal;
a substrate portion having a mounting portion on which the printed circuit board is mounted, the printed circuit board mounted on a surface of the substrate portion;
a conductive layer disposed on the mounting portion of the substrate portion; and
an adhesive agent connecting the connection terminal and the conductive layer to each other,
wherein
the adhesive agent is an anisotropic conductive adhesive agent and contains a plurality of conductive powder particles,
a plurality of linear projections arranged in a first direction and extending in a second direction intersecting with the first direction are disposed on the surface of the substrate portion at the mounting portion,
the conductive layer is disposed on a groove portion positioned between linear projections disposed adjacently to each other, wherein the plurality of linear projections includes the linear projections disposed adjacently to each other,
the plurality of linear projections include a first linear projection and a second linear projection disposed adjacently to the first linear projection,
the groove portion includes a first groove that is positioned between the first linear projection and the second linear projection,
a third direction is a direction orthogonal to the first direction and the second direction, and
a length in the third direction from an inner bottom portion of the first groove to a distal end of the first linear projection is shorter than a length in the third direction from the inner bottom portion of the first groove to a surface of the substrate portion disposed adjacently to the mounting portion.

2. The touch sensor according to claim 1 , wherein the first direction and the second direction are orthogonal to each other.

3. The touch sensor according to claim 1 , wherein
the connection terminal and the conductive layer are electrically connected with each other by at least one of the plurality of conductive powder particles,
a portion of the at least one of the plurality of conductive powder particles is brought into contact with the conductive layer, and
an another portion of the at least one of the plurality of conductive powder particles is brought into contact with a distal end of at least one of the plurality of linear projections.

4. The touch sensor according to claim 1 , wherein
the groove portion further includes:
a second groove disposed adjacently to the first groove; and
a third groove which connects the first groove and the second groove to each other, and

the conductive layer is disposed in the third groove.

5. The touch sensor according to claim 4 , wherein the inner bottom portion of the first groove and an inner bottom portion of the third groove are disposed at a same position in the third direction.

6. The touch sensor according to claim 1 , wherein an end of the surface of the substrate portion disposed adjacently to the first linear projection has a chamfered portion.

7. The touch sensor according to claim 1 , wherein a distal end of the first linear projection has a chamfered portion.

8. The touch sensor according to claim 1 , wherein the first groove has a shape tapered in a direction from an opening side toward the inner bottom portion.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Aisaka Tsutomu
• Watanabe Hirotoshi
• Sato Shigeki

Classifications

• H05K3/102

  by bonding of conductive powder, i.e. metallic powder (H05K3/12 takes precedence) · CPC title

• H05K3/323

  by applying an anisotropic conductive adhesive layer over an array of pads · CPC title

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• H05K3/107 Primary

  by filling grooves in the support with conductive material (H05K3/045, H05K3/101, H05K3/1258 and H05K3/465 take precedence) · CPC title

• H05K1/11 Primary

  Printed elements for providing electric connections to or between printed circuits · CPC title