Dissimilar Material Stamping for Optical Bench Alignment
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Solution Overview
Problem
Existing precision stamping processes for optical signal transmission devices face challenges in optimizing material properties for different structural features, leading to suboptimal performance, reliability, and manufacturability, particularly in combining alignment and reflective surface features within a single homogeneous material.
Innovation Solution
A composite structure is developed using dissimilar materials with distinct properties, where one or more auxiliary materials are stamped to create specific features like reflective surfaces and alignment grooves, while the base material provides bulk support, allowing for optimized properties in each component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a homogeneous material is used for the entire structure, then manufacturing is simpler, but performance is suboptimal because material properties cannot be optimized for different features
Solution Approach 1:
The patent applies local quality by using different materials for different portions of the optical bench. The base is made of a first material (e.g., ceramic or metal) while the auxiliary portion is made of a second material (e.g., polymer or different metal alloy). This allows each material to be selected for its optimal properties - the base material for structural stability and thermal properties, and the auxiliary material for specific functional requirements like optical reflection or fiber alignment, thereby improving overall performance without requiring the entire structure to be made of a single compromised material.
Solution Approach 2:
The patent directly implements composite materials by combining dissimilar materials in a single integrated optical bench structure. The base and auxiliary portion are made of different materials that are joined together through co-stamping or other joining methods. This composite approach enables the structure to simultaneously exhibit properties of both materials - such as the thermal stability of metal/ceramic bases with the moldability or optical properties of polymer auxiliary portions, achieving superior performance that neither material could provide alone.
2Manufacturing precision
If tight tolerances are achieved through precision stamping, then manufacturing precision is improved, but the process becomes more complex and time-consuming
Solution Approach 1:
The patent applies preliminary action by performing co-stamping of the base and auxiliary portion in a single integrated operation. The positioning features (such as recesses, protrusions, or alignment marks) are pre-formed during the stamping process itself, rather than requiring subsequent separate positioning or alignment steps. This preliminary formation of positioning features during the main manufacturing process maintains tight tolerances while avoiding additional time-consuming operations, thereby preserving productivity.
Solution Approach 2:
The patent merges multiple manufacturing operations into a single co-stamping process. Instead of separately manufacturing the base, auxiliary portion, and their positioning features, all elements are formed simultaneously in one stamping operation. This consolidation maintains precision through integrated tooling while dramatically improving throughput by eliminating sequential processing steps, directly resolving the contradiction between manufacturing precision and productivity.
3Device complexity
If multiple features are integrated into a single structure, then device complexity is reduced, but material limitations prevent optimization of each feature
Solution Approach 1:
The patent resolves this contradiction by applying local quality - different materials are assigned to different regions of the integrated structure based on functional requirements. The base material is selected for general structural properties, while the auxiliary portion material is specifically chosen for its suitability for features like optical reflection, fiber alignment, or environmental sealing. This regional material differentiation allows each feature to perform at its optimal level within the integrated structure, maintaining both simplicity and performance.
Solution Approach 2:
The patent applies parameter changes by varying the material properties (such as thermal expansion coefficient, elasticity, optical reflectivity, or chemical resistance) across different portions of the integrated structure. By changing material parameters locally rather than using a uniform material, the design achieves optimized performance for each specific feature while maintaining structural integration, thereby resolving the conflict between device simplicity and feature optimization.
Data Source
AI summary
A composite structure includes a base and an auxiliary portion of dissimilar materials. The auxiliary portion is shaped by stamping. As the auxiliary portion is stamped, it interlocks with the base, and at the same time forming a desired structured feature on the auxiliary portion, such as a structured reflective surface, an alignment feature, etc. With this approach, relatively less critical structured features can be shaped on the bulk of the base with less effort to maintain a relatively larger tolerance, while the relatively more critical structured features on the auxiliary portion are more precisely shaped with further considerations to define dimensions, geometries and/or finishes at relatively smaller tolerances. The auxiliary portion may include a composite structure of two dissimilar materials associated with different properties for stamping different structured features.