METHOD FOR MAKING A TWO-LAYER CAPACITIVE TOUCH SENSOR PANEL
First Claim
1. A method of fabricating a two-layer capacitive touch sensor panel comprising the following steps:
- a) depositing a first transparent electrically conductive layer on a transparent cover sheet;
b) forming a first pattern in the first transparent electrically conductive layer to create a first set of discrete electrode structures therein;
c) depositing a transparent dielectric layer over the first discrete electrode structure of the first transparent electrically conductive layer;
d) depositing a second transparent electrically conductive layer onto the transparent dielectric layer;
e) forming a second pattern in the second transparent electrically conductive layer to create a second set of discrete electrode structures therein by laser ablation, the second pattern not penetrating or penetrating only part way through the dielectric layer so as not to damage the first set of discrete electrode structures;
f) forming electrical connections or vias between the first and second transparent electrically conductive layers through the dielectric layer; and
g) forming electrical connections between the first and/or second transparent electrically conductive layer and an electrical track or busbar formed at or adjacent the periphery of the panel.
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Accused Products
Abstract
A method of fabricating a two-layer capacitive touch sensor panel comprising the following steps: a) depositing a first transparent electrically conductive layer on a transparent cover sheet; b) forming a pattern in the transparent electrically conductive layer to create a first set of discrete electrode structures; c) depositing a transparent dielectric layer over the discrete electrode structures; d) depositing a second transparent electrically conductive layer onto the transparent dielectric layer; e) forming a pattern in the transparent electrically conductive layer to create further discrete electrode structures by laser ablation, this pattern either not penetrating or penetrating only part way through the dielectric layer so as to avoid damaging the first set of discrete electrode structures; f) forming electrical connections or vias between the two transparent electrically conductive layers through the dielectric layer; and g) forming electrical connections between the transparent electrically conductive layer(s) and an electrical track or busbar formed at the periphery of the panel.) The method provides a maskless, chemical free way to fabricate a two-layer “cover integrated” sensor. A two-layer capacitive touch sensor panel fabricated by this method is also described
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Citations
19 Claims
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1. A method of fabricating a two-layer capacitive touch sensor panel comprising the following steps:
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a) depositing a first transparent electrically conductive layer on a transparent cover sheet; b) forming a first pattern in the first transparent electrically conductive layer to create a first set of discrete electrode structures therein; c) depositing a transparent dielectric layer over the first discrete electrode structure of the first transparent electrically conductive layer; d) depositing a second transparent electrically conductive layer onto the transparent dielectric layer; e) forming a second pattern in the second transparent electrically conductive layer to create a second set of discrete electrode structures therein by laser ablation, the second pattern not penetrating or penetrating only part way through the dielectric layer so as not to damage the first set of discrete electrode structures; f) forming electrical connections or vias between the first and second transparent electrically conductive layers through the dielectric layer; and g) forming electrical connections between the first and/or second transparent electrically conductive layer and an electrical track or busbar formed at or adjacent the periphery of the panel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A two-layer capacitive touch sensor panel comprising:
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a transparent cover sheet;
a first transparent electrically conductive layer deposited on the transparent cover sheet;a first pattern in the first transparent electrically conductive layer providing a first set of discrete electrode structures therein;
a transparent dielectric layer deposited over the first discrete electrode structure of the first transparent electrically conductive layer;a second transparent electrically conductive layer deposited onto the transparent dielectric layer; a second pattern in the second transparent electrically conductive layer formed by laser ablation to create a second set of discrete electrode structures therein, the second pattern not penetrating or penetrating only part way through the dielectric layer so as not to damage the first set of discrete electrode structures; electrical connections or vias between the first and second transparent electrically conductive layers through the dielectric layer; and electrical connections between the first and/or second transparent electrically conductive layer and an electrical track or busbar formed at or adjacent the periphery of the panel. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification