Display Panel Terminal Pin Warping Prevention
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Solution Overview
Problem
During the module process of TFT-LCD manufacturing, the driver chip output pin is prone to warping due to excessive insertion into the display panel, leading to broken traces or poor contact, especially when the pin extends beyond the edge of the terminal pin, causing alignment issues and reduced yield.
Innovation Solution
A display panel design with a terminal pin that is longer than the overlap region of the driver chip output pin, featuring a conductive layer and a heightening portion to support the pin and prevent warping, ensuring a flat bonding surface even with excessive insertion, and a crimping head that matches the lengthened terminal pin to secure the connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driver chip output pin is bonded to the connection terminal, then the electrical connection is established, but the pin may be excessively inserted and warp, leading to broken traces or poor contact
Solution Approach 1:
The patent applies preliminary action by pre-designing the terminal pin with a longer insertion length than the driver chip output pin before the bonding process occurs. This prevents excessive insertion and warping by establishing proper geometric constraints in advance, eliminating the need for post-bonding adjustments or repairs.
Solution Approach 2:
The patent changes the geometric parameter of the terminal pin by increasing its insertion length beyond the standard overlap region. This parameter modification ensures that the terminal pin provides sufficient support surface area to prevent the driver chip output pin from warping during bonding, while maintaining proper electrical connection.
2Stability of the object's composition
If the terminal pin length is increased to prevent warping, then the support surface is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies local quality by selectively extending only the insertion portion of the terminal pin that contacts the driver chip output pin, while keeping other portions of the terminal pin at standard dimensions. This localized modification provides the necessary support surface area to prevent warping without unnecessarily increasing overall device complexity or manufacturing difficulty.
3Stability of the object's composition
If the terminal pin is made longer to accommodate excessive insertion, then warping is prevented, but the manufacturing precision requirements increase
Solution Approach 1:
The patent establishes proper geometric constraints in advance by designing the terminal pin with a predetermined longer insertion length. This preliminary design approach converts the manufacturing challenge from controlling variable insertion depths to simply fabricating pins with a fixed, optimized length, thereby reducing manufacturing precision requirements.
Solution Approach 2:
The patent provides a geometric buffer by making the terminal pin longer than the driver chip output pin. This beforehand cushioning creates a margin of error that accommodates normal variations in bonding processes without causing warping or trace breakage, thereby reducing the stringency of manufacturing precision requirements.
Data Source
AI summary
This application discloses a display panel and a processing device thereof. The display panel includes: a display screen and a connection terminal arranged at an edge of the display screen; a driver chip assembly connected to the connection terminal; a driver chip output pin arranged on a side, close to the connection terminal, of the driver chip assembly; a terminal pin connected to the driver chip output pin by bonding; and a fanout region arranged on a side, away from the edge of the display screen, of the terminal pin, where an insertion length of the terminal pin is greater than the length of an overlap region of the driver chip output pin and the terminal pin, where the terminal pin is higher than the fanout region.