Touch module and manufacturing method thereof

An electronic device comprising:

• a substrate having a first surface and a second surface, wherein the first surface and the second surface are opposite to each other;
• at least two first touch electrodes embedded inside the substrate;
• at least two second touch electrodes embedded inside the substrate;
• at least one conductive residual material formed on the second surface of the substrate;
• at least one electrode channel embedded inside the substrate, and configured to electrically connect the second touch electrodes to each other;
• and
• at least one bridge disposed on the first surface of the substrate, and configured to electrically connect the first touch electrodes to each other;
• wherein the first touch electrodes are electrically isolated from the second touch electrodes, wherein heights of the first touch electrodes relative to the first surface of the substrate are different from a height of the electrode channel relative to the first surface of the substrate.

An electronic device comprising:

• a substrate having a first surface and a second surface, wherein the first surface and the second surface are opposite to each other;
• at least two first touch electrodes embedded inside the substrate;
• at least two second touch electrodes embedded inside the substrate;
• at least one conductive residual material formed on the second surface of the substrate;
• at least one electrode channel embedded inside the substrate, and configured to electrically connect the second touch electrodes to each other;
• and
• at least one trace disposed on the first surface of the substrate and electrically contacted to at least one of the first touch electrodes;
• wherein the first touch electrodes are electrically isolated from the second touch electrodes, wherein heights of the first touch electrodes relative to the first surface of the substrate are different from heights of the second touch electrodes relative to the first surface of the substrate.