Optical Component Bond Slots for Adhesive Flow and Alignment
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Solution Overview
Problem
The challenge in opto-electronic assemblies is maintaining precise alignment and stability of components under environmental changes, as small bond lines hinder adhesive flow and restrict post-placement adjustments, making active alignment difficult due to high friction and hydrostatic compression issues.
Innovation Solution
Incorporating bond slots on the attachment surfaces of optical components provides a path for the adhesive material to flow, reducing pressure and allowing for improved alignment and stability by maintaining a small bond line while enabling efficient attachment and alignment processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a thin bond line is used to improve alignment stability, then the lifetime stability of the assembly is improved, but the adhesive flow is restricted due to friction and hydrostatic compression
Solution Approach 1:
The bonding interface is segmented by introducing bonding slots that divide the continuous adhesive layer into discrete flow paths. These slots create channels that guide adhesive material flow from the bulk toward the bonding interface, reducing frictional resistance and enabling adequate adhesive flow even with thin bond lines (less than five microns).
Solution Approach 2:
The bonding slots act as intermediary structures that mediate between the adhesive material and the bonding surfaces. They provide a transition zone that reduces the hydrostatic compression effect by creating flow paths, thereby facilitating adhesive flow while maintaining the thin bond line geometry required for alignment stability.
2Stability of the object's composition
If a thin bond line is used to improve alignment stability, then the lifetime stability of the assembly is improved, but post-placement adjustment capability is eliminated
Solution Approach 1:
The bonding slots segment the adhesive layer to create controlled flow paths that reduce friction. This segmentation allows the adhesive to flow more easily during post-placement adjustments while maintaining the thin bond line geometry that provides long-term alignment stability once bonding is complete.
Solution Approach 2:
The bonding slots enable the adhesive to transition from a static, friction-restricted state to a dynamic, flow-enabled state during adjustment operations. The slots provide channels that facilitate adhesive movement when adjustment is needed, while the thin bond line geometry is preserved to ensure stability after the adjustment phase.
3Stability of the object's composition
If the bond line is reduced to less than five microns to improve stability, then alignment stability is improved, but adhesive displacement becomes increasingly difficult
Solution Approach 1:
The bonding slots divide the adhesive layer into discrete flow paths that reduce the overall frictional resistance. By segmenting the bonding interface, the force required to displace adhesive material is significantly reduced, enabling adequate flow even when the bond line thickness is less than five microns.
Solution Approach 2:
The bonding slots create hydraulic flow paths for the adhesive material. These channels allow the adhesive to flow under reduced pressure conditions, minimizing the hydrostatic compression effect that would otherwise require excessive force to overcome in a thin, continuous bond line.
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
The use of bond slots facilitates efficient adhesive flow, reduces curing time, and maintains bond stability, ensuring precise alignment and longevity of opto-electronic assemblies under varying environmental conditions.
Implementation Method 1
it becomes increasingly difficult to displace the liquid material between the lens and substrate (i.e., hydrostatic compression)
Implementation Method 2
the friction-based restriction of the flow of the adhesive (i.e., molecular flow regime)
Data Source
AI summary
An opto-electronic apparatus comprises a substrate for supporting a plurality of components forming an opto-electronic assembly and an optical component attached to the substrate with an adhesive material, such as a solder or epoxy. The optical component is formed to include a plurality of bond slots disposed in parallel across at least a portion of the bottom surface of the optical component, the plurality of bond slots providing a path for a liquid adhesive material and improving the ability to displace the liquid adhesive material as the component is pressed into the surface of the substrate during the attachment process.