Camera Module Dust Trap Adhesive for Image Sensor Protection
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Solution Overview
Problem
Dust particles trapped during the manufacturing of digital camera modules can impact the image sensor, causing blemishes in the images produced, as conventional clean room environments cannot effectively eliminate particles smaller than 5μ, and the fine threads in camera module housings trap dust that is difficult to remove.
Innovation Solution
A dust trap substance with adhesive qualities is applied to the housing and threads of the camera module to capture and maintain dust particles, preventing them from reaching the image sensor, and is designed to maintain its effectiveness at high temperatures and not produce gas, which could damage components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manufacturing is performed in a class 1,000 clean room environment, then general dust control is achieved, but dust particles smaller than 5μ still penetrate and get trapped in fine threads and crevices
Solution Approach 1:
The patent applies dust trap substance to the housing and threads before final assembly, creating a preventive barrier that captures dust particles during assembly rather than attempting to remove them later. This preliminary application of adhesive substance addresses dust in crevices that would be inaccessible to post-assembly cleaning methods.
Solution Approach 2:
The dust trap substance acts as an intermediary material applied to threads and housing surfaces. It serves as a mediating layer that captures dust particles through adhesion, preventing direct contact between dust and critical surfaces while maintaining thread functionality.
2Strength
If fine pitch threads are used for attaching housing and lens barrel, then secure attachment is achieved, but dust particles are trapped in the small crevices created by fine threads
Solution Approach 1:
The dust trap substance serves as an intermediary applied to thread surfaces, maintaining the fine pitch thread structure for secure attachment while adding a dust-capturing layer that prevents dust from being trapped in the thread crevices during assembly.
Solution Approach 2:
The patent changes the surface parameter of threads by applying dust trap substance, which modifies the thread surface properties to add dust-capturing capability while preserving the mechanical attachment function of the fine pitch threads.
3Strength
If glass filler particles are present in plastic housing material, then structural integrity is achieved, but glass particles can be pulled or ground away during use and contribute to dust
Solution Approach 1:
The patent converts the potentially harmful glass particles that may be released during use into a beneficial dust-capturing medium. The dust trap substance captures these released glass particles and other dust, transforming what would be image-degrading contaminants into trapped particles that are contained and prevented from reaching the image sensor.
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 a dust trap substance significantly reduces the number of dust particles reaching the image sensor, thereby decreasing image blemishes and maintaining image quality by effectively capturing and retaining dust within the camera module.
Implementation Method 1
a dust trap substance adhered to the housing configured to capture and maintain at least one dust particle
Data Source
AI summary
A camera module for capturing an image. The camera module including an image sensor including a die mounted on a substrate, a housing coupled with the substrate to substantially enclose the die, and a dust trap substance adhered to the housing configured to capture and maintain at least one dust particle to decrease movement of dust particles within the housing, which decreases a number of blemishes in the captured image.