Integrated Touch Panel With Fingerprint Identification Circuit
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Solution Overview
Problem
Conventional touch modules and fingerprint identification modules are typically manufactured and packaged separately, leading to a lack of integration and increased manufacturing complexity and cost.
Innovation Solution
A touch panel design that integrates touch sensing and fingerprint recognition functions on the same glass substrate, with a fingerprint identification chip connected via Au bumps to the substrate, eliminating the need for additional packaging and using a driving flexible board to connect circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If touch module and fingerprint identification module are manufactured separately, then each module can be independently optimized, but the manufacturing process becomes more complex and costly
Solution Approach 1:
The patent combines the touch sensing circuit and fingerprint identification circuit onto a single glass substrate, creating an integrated module that eliminates the need for separate manufacturing and packaging processes while maintaining the functional optimization of both modules
Solution Approach 2:
The glass substrate serves multiple functions simultaneously: it acts as the base for both the touch sensing circuit and fingerprint identification circuit, providing a unified platform that reduces manufacturing steps and assembly complexity
2Manufacturing precision
If touch module and fingerprint identification module are packaged separately, then quality control is easier, but the overall manufacturing cost and time increase
Solution Approach 1:
By integrating both circuits on one substrate during the same manufacturing process, the patent achieves unified quality control standards while eliminating redundant packaging operations, thereby improving overall manufacturing efficiency
3Ease of manufacture
If fingerprint identification chip is connected via Au bumps directly to glass substrate, then packaging process is eliminated, but connection reliability must be ensured
Solution Approach 1:
The Au bumps are pre-formed on the fingerprint identification chip before mounting, ensuring proper electrical connection is established in advance, which eliminates the need for additional packaging processes while maintaining connection reliability through precise pre-positioning
Data Source
AI summary
A touch panel with a fingerprint identification function includes a glass substrate, a fingerprint identification chip, and a driving flexible board. The glass substrate has a surface including a touch sensing area and a fingerprint identification area located at different positions. A touch sensing circuit is formed by etching on the touch sensing area. A fingerprint identification circuit is formed by etching on the fingerprint identification area. The surface has at least one driving contact electrically connected to the touch sensing circuit and the fingerprint identification circuit. The fingerprint identification chip has several Au bumps connected to the fingerprint identification circuit, thereby the fingerprint identification chip is engaged with the surface of the glass substrate. The driving flexible board has at least one driving chip and a driving circuit electrically connected to the driving chip. The driving circuit is engaged with the driving contact of the glass substrate.