Touch Module Embedding Electrodes at Different Heights
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Solution Overview
Problem
The manufacturing process of touch modules often results in uneven refractive indexes due to the etching process used to pattern touch electrodes, affecting the optical consistency of the module.
Innovation Solution
The touch module design embeds touch electrodes of different heights within a substrate, ensuring they are insulated from each other, eliminating the need for an etching process and maintaining optical consistency by using embedding inks with and without conducting additives to form distinct electrode layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an etching process is used to pattern touch electrodes, then the touch electrodes can be isolated from each other, but the refractive indexes become uneven affecting optical consistency
Solution Approach 1:
The patent transitions from planar electrode arrangement to three-dimensional arrangement by embedding electrodes at different depths within the substrate. This dimensional change allows electrodes to be spatially separated in the depth direction, achieving insulation without surface etching, thereby maintaining optical consistency while ensuring electrical isolation.
Solution Approach 2:
The patent embeds conductive electrodes within the substrate matrix, nesting the electrodes inside the substrate rather than placing them on the surface. This nesting approach allows the electrodes to be surrounded by insulating substrate material, achieving isolation without requiring etching processes that would compromise optical properties.
2Manufacturing precision
If touch electrodes are embedded at different heights, then optical consistency is maintained, but manufacturing complexity increases
Solution Approach 1:
The patent incorporates conductive additives into the embedding ink before the embedding process, preparing the conductive material in advance. This preliminary preparation simplifies the manufacturing process by eliminating the need for separate electrode formation steps, reducing overall complexity despite the three-dimensional electrode arrangement.
Solution Approach 2:
The patent controls the embedding depth of electrodes by adjusting parameters of the embedding process, such as the depth at which conductive ink is applied or the compression force applied during embedding. By controlling these parameters, the system achieves precise depth control for optical consistency while managing manufacturing complexity through parameter optimization rather than complex process steps.
Data Source
AI summary
A touch module and a manufacturing method thereof are disclosed. The touch module includes a substrate, at least one first touch electrode, and at least one second touch electrode. The first touch electrode is embedded into the substrate. The second touch electrode is embedded into the substrate. A height of the first touch electrode relative to a first surface of the substrate is different from a height of the second touch electrode relative to the first surface of the substrate, such that the first touch electrode and the second touch electrode are insulated from each other.