Electrochromic Device Substrate Fracture Indication for Contacting
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Solution Overview
Problem
The manufacturing of non-self-erasing electrochromic devices faces challenges in efficient contacting of thin electron conducting layers, which complicates large-scale production and storage due to the difficulty in cutting and handling of semi-manufactured components, especially when varying geometrical shapes are required.
Innovation Solution
The method involves creating a fracture indication along a line in the substrate sheets of electrochromic layered structures, allowing for partial cutting or perforation to expose electron conducting layers, enabling flexible manufacturing and efficient production by using techniques like laser ablation for precise cutting and minimizing damage to the layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If protruding parts are provided for contacting electron conducting layers, then contacting becomes easier, but device complexity increases and manufacturing becomes more difficult
Solution Approach 1:
The patent extracts the contacting function from the main device body by providing protruding parts that extend beyond the substrate edges. This allows the electron conducting layers to be accessed and contacted separately from the main device assembly, simplifying the contacting operation while isolating the complexity to specific localized structures rather than the entire device.
Solution Approach 2:
The patent transitions from planar contacting (at the same level as substrate surfaces) to three-dimensional contacting by extending protruding parts vertically beyond the substrate edges. This dimensional change allows contacting to occur at accessible locations without requiring complex lateral manipulation or disassembly of the device structure.
2Productivity
If manufacturing is divided into different stages at different locations, then production flexibility and cost reduction improve, but risk of damage to semi-manufactured devices increases
Solution Approach 1:
The patent segments the manufacturing process into distinct stages: first producing the electrochromic layered structure with substrate, then separately adding the protruding parts and electron conducting layers in subsequent assembly steps. This segmentation allows different stages to be performed at different locations while protecting the fragile electrochromic layers from damage during transport, as they remain enclosed within the substrate structure until final assembly.
Solution Approach 2:
The patent performs preliminary actions by pre-assembling the electrochromic layered structure within the substrate at a first location, then transporting this protected intermediate product to a second location for final assembly of protruding parts and contacting. This preliminary encapsulation protects the delicate electrochromic layers during transport, reducing damage risk while enabling distributed manufacturing.
3Manufacturing precision
If complex manufacturing processes are used, then manufacturing precision may improve, but productivity decreases and manufacturing cost increases
Solution Approach 1:
The patent employs universal substrate structures and standardized protruding part designs that can be used across different device configurations. The substrate serves multiple functions: structural support, protection during transport, and mounting platform for electron conducting layers. This multi-functionality reduces the need for complex, specialized manufacturing steps while maintaining precision through consistent geometric relationships.
Solution Approach 2:
The patent performs preliminary alignment and positioning actions during the protruding part formation process, where the protruding parts are created with predetermined geometries and positions relative to the substrate. This preliminary structuring establishes reference frames that guide subsequent assembly steps, ensuring manufacturing precision without requiring complex real-time alignment procedures that would reduce productivity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach facilitates cost-effective large-scale production and flexible manufacturing by allowing for the production of differently shaped devices from a single process, reducing the risk of damage during storage and transportation, and enabling reliable electrical connections.
Implementation Method 1
using techniques like laser ablation for precise cutting and minimizing damage to the layers
Data Source
AI summary
A method for enhancing the reliability of contacting the conductive layers in a laminated electrochromic device structure is disclosed (FIG. 7). The laminate structure (10), typically fabricated in the form of a sheet, comprises: two polymer substrates (21, 22); two conductive layers (31, 32)—one arranged on each substate—and facing each other; an electrochromic layer (41) and a counter-electrode layer (42) each arranged on different conductive layers; and an electrolyte layer (50) interposed between the electrochromic layer and the counter-electrode layer. Either an incision with an undulating cutting depth or perforations of predetermined sizes, depths (through at least most of one substrate) and separations are prefabricated along a desired tear line in the structure (step 220)—once the final shape of the device is defined—to facilitate the tearing away of the one polymer substrate to reveal the conductive layer to be contacted on the underlying substrate.