Stack Manufacturing Apparatus Tension Control for Flexible Substrates
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Solution Overview
Problem
Current manufacturing processes for flexible devices, such as semiconductor and light-emitting devices, face challenges in achieving high yield and reliability due to the difficulty in handling and bonding thin substrates, which are prone to bending and contamination, leading to decreased productivity and increased defects.
Innovation Solution
A stack manufacturing apparatus is developed, featuring a first supporting body supply unit that intermittently unrolls a roll-shaped supporting body, a first adhesive layer formation unit that forms an adhesive layer on the supporting body, and a bonding unit that bonds a sheet-shaped member to the supporting body using the adhesive layer, while tension is applied to prevent bending and ensure precise stacking, and a control unit that manages the end portion of the supporting body for continuous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If thin substrates are used to make devices lightweight and flexible, then device weight and flexibility are improved, but substrate stability and resistance to bending decrease
Solution Approach 1:
The patent employs a multi-layer stacked structure where thin substrates are nested between supporting bodies and adhesive layers. The supporting bodies provide structural stability while the thin substrates maintain device flexibility and lightness, resolving the contradiction through hierarchical nesting of components with different functional properties.
Solution Approach 2:
The patent creates a composite structure combining thin substrates with supporting bodies and adhesive layers. This composite approach allows the device to simultaneously achieve the lightness and flexibility of thin substrates while gaining the stability and strength of supporting bodies, effectively resolving the weight-stability contradiction.
2Adaptability or versatility
If thin substrates are handled during bonding, then device flexibility is maintained, but handling difficulty and contamination increase
Solution Approach 1:
The patent introduces adhesive layers as intermediary components between thin substrates and supporting bodies. These adhesive layers facilitate the bonding process by providing a manageable interface that reduces handling difficulty and minimizes contamination risks while preserving the flexibility of the thin substrate structure.
Solution Approach 2:
The patent utilizes flexible adhesive layers and supporting bodies that can accommodate the thin substrate without causing damage or contamination. These flexible components enable easier handling and positioning during the bonding process while maintaining the overall flexibility of the device.
3Productivity
If continuous production is implemented to improve productivity, then manufacturing efficiency increases, but yield and reliability decrease due to substrate bending and contamination
Solution Approach 1:
The patent applies tension to the thin substrates before and during the bonding process in continuous production. This preliminary action prevents substrate bending and contamination that would otherwise occur during high-speed manufacturing, thereby maintaining high yield and reliability while achieving improved productivity through continuous operation.
Solution Approach 2:
The patent implements a control system that monitors and adjusts tension application during continuous production. This feedback mechanism ensures that substrates remain stable and free from bending or contamination throughout the manufacturing process, allowing continuous operation without compromising device reliability.
4Manufacturing precision
If tension is applied to prevent substrate bending, then stacking precision is improved, but device complexity increases
Solution Approach 1:
The patent designs the tension applying device to serve multiple functions: it not only prevents substrate bending but also ensures proper alignment and contact between stacked components. This multi-functionality achieves high stacking precision without proportionally increasing apparatus complexity, as the same tension mechanism performs multiple critical tasks.
Data Source
AI summary
The stack manufacturing apparatus includes a first supporting body supply unit which is configured to intermittently unroll a roll sheet-shaped first supporting body and includes one of a pair of tension applying devices capable of applying tension to the unrolled first supporting body; a first adhesive layer formation unit configured to form a first adhesive layer over the first supporting body while the first supporting body supply unit suspends unrolling of the first supporting body; a first bonding unit configured to bond the first supporting body and a sheet-shaped member using the first adhesive layer; and a control unit which is configured to hold an end portion of the first supporting body and includes the other of the pair of tension applying devices.