Drop resistant MEMS actuator-imager assembly package

WO2025184720A8 Publication Date: 2025-10-02SHEBA MICROSYST INC
0 Cites 0 Cited by

Patent Information

Application Number
PCT/CA2024/050266
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-03-04
Publication Date
2025-10-02

AI Technical Summary

Technical Problem

MEMS electrostatic actuators used for autofocus and optical image stabilization in cameras are vulnerable to damage from drops and severe shocks, particularly when moving parts carrying heavy loads like image sensors hit fixed parts, leading to chipping and image quality degradation.

Method used

A MEMS actuator-imager assembly package incorporating flexible and hard stoppers along in-plane axes (±x, ±y) and out-of-plane axes (±z) to decelerate and stop the moving mass, using a combination of springs, protrusions, and a BGA substrate with stopper plates to absorb shocks and prevent damage.

Benefits of technology

The package effectively prevents structural damage and maintains image quality by ensuring the moving parts come to a complete stop without chipping, even under severe mechanical shocks, enhancing the reliability and functionality of the MEMS actuators.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

A MEMS actuator assembly package features a number of drop test resistant mechanisms is disclosed. These mechanisms are used to decelerate and finally stops the heavy load of the image sensor attached to the MEMS actuators along all six directions of the in-plane and out-of-plane axes (±x, ±y, ±z). The MEMS actuator assembly package comprises first and second sets of flexible stoppers attached to the MEMS actuator along with a set of hard stoppers that engage in a sequential manner with the moving mass of the loaded actuator to decelerate it, bringing it to a complete stop when exposed to mechanical shock along the four directions of the in-plane axes (x and y). When the assembly package is exposed along the positive and negative direction of the z-axis, the moving mass is stopped by features built in the package.
Need to check novelty before this filing date? Find Prior Art