Collective Bending of Microelectronic Components for Accurate Curvature
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Solution Overview
Problem
Existing methods for collective bending of microelectronic components often result in undesired curvature, which can affect the optical performance of components like optical components used for light detection or emission.
Innovation Solution
A method involving the creation of an initial structure with microelectronic components and a temporary handle substrate, followed by the use of a shaping support with bent surfaces and an adhesive interlayer to achieve the desired curvature, allowing for precise bending and individualization of components while ensuring electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If microelectronic components are bent using conventional collective bending methods, then the components can be curved, but the curvature does not accurately match the desired curvature
Solution Approach 1:
The patent applies preliminary action by pre-forming recesses in the adhesive layer before placing the microelectronic components. These recesses are created in advance to match the desired curvature, so when components are bonded and cured, they naturally conform to the predetermined curved shape. This pre-preparation of the adhesive structure ensures accurate curvature matching without requiring post-bending adjustments.
Solution Approach 2:
The patent uses the adhesive layer as an intermediary between the flat microelectronic components and the curved support structure. By forming recesses in this intermediary layer, it mediates the transition from flat to curved geometry, allowing components to achieve precise curvature through the controlled deformation of the adhesive rather than direct mechanical bending of the rigid components.
2Manufacturing precision
If microelectronic components are individually handled and processed, then precise curvature control is possible, but production efficiency decreases
Solution Approach 1:
The patent merges multiple individual component processing steps into a single collective operation. Multiple microelectronic components are simultaneously bonded to the curved support structure with pre-formed recesses in the adhesive layer. This collective bonding process maintains precise curvature control for each component while achieving high production efficiency through parallel processing of multiple components in one batch.
Solution Approach 2:
The curved support structure with recesses serves multiple functions simultaneously: it provides the desired curvature template, acts as a bonding substrate, and enables collective handling of multiple components. This multi-functional design eliminates the need for separate curvature imposition steps for each component, thereby improving productivity while maintaining precision.
3Ease of manufacture
If adhesive layer is applied uniformly, then bonding is simple, but adhesion to curved surfaces is insufficient
Solution Approach 1:
The patent applies local quality by creating non-uniform adhesive thickness through recesses at specific locations where components will be bonded. The adhesive layer has varying thickness - thinner in the recess areas directly beneath components and thicker in between - which provides optimal contact and adhesion strength at the component-adhesive interface while maintaining a relatively simple overall bonding process.
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 method effectively achieves the desired curvature of microelectronic components, improving their optical performance by allowing for accurate shaping and assembly, while maintaining mechanical and electrical integrity.
Implementation Method 1
depositing an adhesive interlayer covering the lower face of the microelectronic components or the upper face of the shaping support; affixing the initial structure onto the shaping support, so that the microelectronic components rest and adhere at a support area of their lower face
Implementation Method 2
The method may include, before the removal step, a temperature rise to a first temperature within a crosslinking temperature range of the adhesive interlayer, then, during or after the bending step, a temperature rise to a second temperature within the crosslinking temperature range and higher than the first temperature
Implementation Method 3
bending the microelectronic components, so that they are curved, and adhere over the bent surfaces by the adhesive interlayer
Data Source
AI summary
A method for collective bending of microelectronic components, including affixing an initial structure including a temporary handle and a plurality of microelectronic components, onto a shaping support, then removing the temporary handle, and bending the microelectronic components so that they are curved and adhere, by an adhesive layer, to the bent surfaces of the shaping support.