Encapsulation Metal Sheet Adhesive Geometry for Film Detachment
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Solution Overview
Problem
The existing encapsulation methods for organic light-emitting display devices face challenges in efficiently detaching the releasing film from the adhesive layer, leading to low productivity due to incomplete removal of the metal sheet and adhesive layer, resulting in production delays.
Innovation Solution
A metal sheet with first and second adhesive layers, where the outer line of the first adhesive layer passes through the inner region of the second adhesive layer, featuring a pick-up point with a punched corner shape, allowing for smooth detachment of the releasing film and preventing the main body from being lifted, thereby enhancing the detachment process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the releasing film is detached from the adhesive layer in a fixed state, then the metal sheet can be attached to the encapsulation substrate, but the releasing film is not cleanly detached and the metal sheet itself is detached together with the releasing film
Solution Approach 1:
The outer line of the first adhesive layer is pre-formed to pass through the inner region of the second adhesive layer, creating a pick-up point structure before the detachment process. This preliminary structural arrangement enables the releasing film to be cleanly detached by picking up from the pick-up point, preventing the metal sheet from being detached together with the releasing film.
2Strength
If the adhesive layer area is increased to ensure complete coverage, then the bonding strength is improved, but the detaching process becomes more difficult and productivity decreases
Solution Approach 1:
The adhesive layer structure is segmented into a first adhesive layer with a larger area for bonding to the encapsulation substrate and a second adhesive layer with a smaller area for bonding to the base substrate. The outer line of the first adhesive layer passes through the inner region of the second adhesive layer, creating a pick-up point that enables selective detachment of the releasing film without detaching the metal sheet.
Data Source
AI summary
A metal sheet for encapsulating an organic light-emitting display device, the metal sheet including a main body, first and second adhesive layers respectively formed on both surfaces of the main body, and first and second releasing films that respectively protect the first and second adhesive layers by covering them. A portion of an outer line of the first adhesive layer passes an inner region of the second adhesive layer.