Asymmetric Stacked Lens Structure for Compact Module Assembly
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Solution Overview
Problem
Existing wafer level lens manufacturing methods result in tetragonal lens shapes during dicing, leading to increased size and variability, which complicates the integration of VCM for AF and affects module assembly accuracy, and can cause chipping and dust generation due to sharp corners.
Innovation Solution
A stacked lens structure where substrates with lenses are stacked with varying side surface widths and shapes, allowing for consistent dimensions at one angle and differing dimensions at opposite angles, reducing module size without increasing production steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If dicing cutting is conducted in horizontal and vertical directions to individualize wafer level lenses, then lenses can be separated for use, but the lens becomes tetragonal in outer shape which increases module size and leaves no space for VCM integration
Solution Approach 1:
The patent introduces asymmetric cut lines that are inclined relative to the horizontal and vertical directions, transforming the symmetric tetragonal lens shape into an asymmetric form with optimized dimensions. This allows the lens to maintain individualizability while reducing the overall module size and creating space for VCM integration.
Solution Approach 2:
The patent changes the cutting approach from two orthogonal directions to include inclined dimensions, effectively utilizing a third angular dimension to optimize the lens shape. This dimensional change enables smaller module footprint while maintaining functionality.
2Productivity
If dicing cutting is conducted in horizontal and vertical directions, then lenses can be individualized, but variability in processing mark size is generated which affects module assembly accuracy
Solution Approach 1:
The patent changes the cutting parameters from orthogonal horizontal and vertical directions to inclined directions at specific angles. This parameter change standardizes the processing mark size and position, thereby improving module assembly accuracy while maintaining production efficiency.
3Ease of manufacture
If dicing cutting is conducted in horizontal and vertical directions, then lenses can be separated, but sharp corners are generated which are susceptible to chipping and dust generation
Solution Approach 1:
The asymmetric inclined cut lines eliminate the sharp corners characteristic of tetragonal shapes. By introducing angled cuts, the lens edges become more gradual and less prone to chipping, improving reliability while maintaining the ability to separate lenses for individual use.
Data Source
AI summary
The present disclosure relates to a stacked lens structure and a method of manufacturing the same, and an electronic apparatus by which it is possible to realize miniaturization of a lens module. A stacked lens structure includes plural substrates with lens stacked on one another, the substrate with lens each having a lens disposed on inside of a through-hole formed in the substrate. In regard of side surfaces at side parts corresponding to sides of a rectangle surrounding the substrate with lens in plan view as viewed in an optical axis direction, a width and a shape are the same among all the substrates with lens, whereas in regard of side surfaces at opposite angle parts corresponding to opposite angles of the rectangle, the width or shape differs between at least two substrates with lens. The present technology is applicable, for example, to a lens module or the like.