Anti-overflow Grooves for ACF Containment in Flexible OLED Bonding
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Solution Overview
Problem
The frequent overflow of anisotropic conductive film (ACF) during the manufacturing process of flexible OLED displays causes difficulty in peeling the glass substrate, leading to reduced yield of module products.
Innovation Solution
A display panel design featuring an anti-overflow portion with continuous grooves around the bonding area, where the grooves are arranged to capture excess ACF, reducing the flow rate and preventing overflow, thereby facilitating the peeling of the glass substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the glass substrate is peeled off after the bonding process, then the manufacturing process can be completed, but the ACF overflow causes difficulty in peeling and reduces yield
Solution Approach 1:
The anti-overflow portion is constructed in advance during the planarization process, before the bonding process occurs. This preliminary structural preparation creates grooves and retaining walls that will contain the ACF during bonding, preventing overflow issues that would otherwise make peeling difficult and reduce yield.
Solution Approach 2:
Instead of trying to prevent ACF overflow through complex bonding process controls, the invention converts the potential harmful overflow into a beneficial contained structure. The anti-overflow portion captures the excess ACF material and redirects it into designated grooves, transforming what would be a manufacturing defect into a controlled feature that facilitates easier peeling and maintains high yield.
2Reliability
If the ACF is applied during bonding, then electrical connection is achieved, but the ACF overflows and causes manufacturing difficulties
Solution Approach 1:
The anti-overflow portion creates localized structural features (grooves and retaining walls) specifically in the non-display area surrounding the bonding region. These local modifications to the planarization layers provide targeted containment for the ACF exactly where overflow occurs, while leaving the bonding area itself unchanged to maintain reliable electrical connections through the terminals.
Solution Approach 2:
The anti-overflow portion acts as an intermediary structure between the bonding area and the surrounding non-display area. It mediates the ACF flow by providing a transitional zone with grooves and retaining walls that guide and contain the adhesive material, preventing it from reaching areas where it would cause manufacturing problems while still allowing proper bonding to occur.
Data Source
AI summary
The present application discloses a display panel and a display device. The display panel includes a display area and a non-display area; the non-display area includes a bonding area away from the display area, and a plurality of terminals are disposed in the bonding area; and the non-display area further includes an anti-overflow portion disposed around the plurality of terminals. The present application prevents the problem of ACF overflow by disposing the anti-overflow portion around the plurality of terminals in the non-display area, such that the peeling of the glass substrate is facilitated, and the yield of the product is improved.