Camera Module Flexure Segmented Base Layer Signal Isolation
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Solution Overview
Problem
In compact camera modules, the use of flexure arms for routing ground reference signals can lead to increased size and cross-coupling issues, affecting image quality and power optimization, as these arms are often necessary for electrical communication but can interfere with other components.
Innovation Solution
Implementing a segmentation region in the base layer to isolate ground reference signals from different components, allowing them to be routed through the base layer instead of the routing layer, thereby reducing cross-coupling and optimizing flexure design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ground reference signals are routed through flexure arms, then electrical communication is established, but the flexure module size increases and cross-coupling occurs
Solution Approach 1:
The base layer is segmented into multiple isolated regions, each dedicated to routing ground reference signals for specific components. This segmentation allows ground signals to be routed locally within the base layer rather than requiring long paths through flexure arms, thereby reducing the overall flexure module size while maintaining reliable electrical communication.
Solution Approach 2:
The patent transitions from routing ground signals primarily through the routing layer and flexure arms (one-dimensional path) to utilizing the base layer as an additional dimension for signal routing. By embedding ground signal paths within the base layer structure itself, the design eliminates the need for external flexure arms, reducing module size while preserving electrical connectivity.
2Device complexity
If ground reference signals from different components share the same routing path, then routing is simplified, but cross-coupling between signals increases
Solution Approach 1:
The base layer is divided into multiple isolated segments, with each segment dedicated to routing ground reference signals for a specific component. This physical segmentation creates independent signal paths that prevent electromagnetic cross-coupling between ground signals from different components, while the overall routing structure remains relatively simple and systematic.
Solution Approach 2:
Each region of the base layer is designed with specialized local quality optimized for its specific component's ground signal routing requirements. This localized optimization allows each segment to handle its specific signal with minimal interference, reducing cross-coupling while maintaining overall routing efficiency.
Data Source
AI summary
A flexure for a camera includes a dynamic platform to which an image sensor and a substrate are connected such that the image sensor and the substrate move together with the dynamic platform. A driver associated with an actuator to move the image sensor relative to a lens group is mounted to the substrate. The flexure also includes a static platform connected to a static portion of the camera, a plurality of flexure arms that mechanically connect the dynamic platform to the static platform, a routing layer and a base layer both at least partially forming the dynamic platform, the static platform, and the plurality of flexure arms, and at least one segmentation region extending through the base layer and configured to physically isolate a return current from the driver and through the base layer from a return current from the image sensor and through the base layer.