Substrate Recess Adhesive Layout to Prevent Display Glue Overflow
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Solution Overview
Problem
In display devices with two substrate structures, the glue material often overflows during the adhering process, affecting subsequent processes like cutting and bonding, or the glue may be insufficient for effective bonding.
Innovation Solution
A display device with a recess design, where the first substrate structure includes a recess to contain a part of the adhesive layer, reducing overflow and ensuring adequate bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If glue material is applied between two substrate structures during adhering, then bonding between substrates is achieved, but glue material overflows and affects subsequent processes
Solution Approach 1:
The patent applies local quality by creating a recess structure at specific locations on the substrate where glue is applied. This recess provides a localized containment area that allows the glue to be concentrated where needed for bonding while preventing overflow in other areas. The recess modifies the local geometry to control glue distribution and prevent harmful overflow effects.
2Reliability
If more glue material is applied to ensure adequate bonding, then bonding effectiveness is improved, but glue overflow increases and affects cutting and bonding processes
Solution Approach 1:
The recess structure is prepared in advance on the substrate before the glue application step. This preliminary action creates a pre-defined containment geometry that guides the glue material during subsequent application, ensuring that adequate glue is retained for effective bonding while preventing overflow that would disrupt later processes like cutting and bonding.
3Productivity
If the adhering process is performed without a recess structure, then the process is simple, but abnormal conditions occur during adhering and yield is reduced
Solution Approach 1:
Rather than making the entire substrate complex, the patent introduces a localized recess structure only at the specific area where glue is applied. This minimal structural modification provides the necessary glue containment to improve yield and prevent abnormalities during adhering, while keeping the rest of the substrate structure simple and unchanged.
Data Source
AI summary
A display device including a first substrate structure, a second substrate structure and an adhesive layer is provided by the present disclosure. The first substrate structure includes a first recess. The second substrate structure is disposed opposite to the first substrate structure. The adhesive layer is sandwiched between the first substrate structure and the second substrate structure, wherein a part of the adhesive layer is filled in the first recess.