PCB Locating Features for Precision Component Alignment
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Solution Overview
Problem
Current methods for aligning precision components in assemblies, such as optical and electro-optical components, are complex, time-consuming, and costly, requiring high precision manufacturing and significant effort to achieve accurate alignment.
Innovation Solution
The use of locating features, such as electronic surface mount components or MEMS components, constrained by wetting dynamics and advanced kinematic coupling techniques, to precisely align components within an assembly, with attachment materials like hot melt adhesive or solder, allowing for precise positioning and alignment without additional structural support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional mechanical stackup approach is used to align precision components, then alignment precision can be achieved, but assembly complexity and manufacturing cost increase significantly
Solution Approach 1:
The patent extracts the alignment function from the mechanical stackup structure by introducing dedicated locating features (such as precision-machined pins, holes, or geometric features) that are integrated into the substrate or mounting structure. These locating features independently provide positioning constraints, separating the alignment function from the structural support function, thereby reducing overall assembly complexity while maintaining precision.
Solution Approach 2:
The patent implements preliminary action by pre-defining precise locating features during substrate fabrication or component manufacturing. These features are prepared in advance with exact dimensions and positions, enabling components to be quickly and accurately positioned during assembly without requiring complex real-time adjustment mechanisms or high-precision manual stacking operations.
2Manufacturing precision
If traditional mechanical stackup approach is used to align precision components, then alignment precision can be achieved, but assembly time increases significantly
Solution Approach 1:
By extracting the alignment function into dedicated locating features, the patent enables rapid positioning of components. These features provide immediate geometric constraints that guide component placement without requiring time-consuming manual measurement, adjustment, or complex fixturing operations, thereby significantly improving assembly efficiency.
Solution Approach 2:
The locating features enable self-alignment and self-positioning of components during assembly. The geometric constraints provided by features such as pins fitting into holes or surfaces mating with reference planes automatically establish precise positions without requiring external alignment tools or operator skill, making the assembly process faster and more repeatable.
3Manufacturing precision
If traditional mechanical stackup approach is used to align precision components, then alignment precision can be achieved, but manufacturing cost increases significantly
Solution Approach 1:
The patent extracts the alignment function into simple, manufacturable locating features that can be integrated into standard substrate or component designs. These features use common manufacturing processes (such as precision drilling, machining, or molding) rather than requiring specialized high-precision stacking equipment or complex assembly fixtures, thereby reducing manufacturing cost while maintaining alignment precision.
Solution Approach 2:
The patent employs simple locating features that can be manufactured cost-effectively using standard processes. These features serve their alignment purpose during assembly and can be disposed of or integrated into the final product without requiring expensive, reusable precision fixtures or specialized tooling, thereby reducing overall manufacturing cost.
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 simplifies and accelerates the alignment process, reducing complexity and cost while achieving high precision in component placement across multiple degrees of freedom, applicable in various precision instruments and devices.
Implementation Method 1
The placement of the components may be further constrained using wetting dynamics to precisely locate said locating features
Implementation Method 2
The placement of the components may be further constrained using wetting dynamics to precisely locate said locating features
Data Source
AI summary
Precisely aligned assemblies can be complex, time consuming, labor intensive, and expensive and a need exists for better alternatives. Systems and methods described herein yield high precision printed circuit board assemblies (PCBAs) that contain pre-built alignment features to address this need. The work of precisely locating components on the PCBA to a final position in the overall assembly is already built in to the board. Locating features are used to precisely position one or more components, such as optical components, electro optical components, or mechanical components in assemblies. The locating features may be used to constrain the positions of those components, such as by kinematic coupling, solder wetting dynamics, semiconductor cleaving, dicing, photolithographic techniques for etching, constant contact force, and advanced adhesive technology to result in optical level positioning that significantly improves or eliminates assembly alignment challenges.