MEMS Compliant Beam Light Modulator Manufacturing
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Solution Overview
Problem
There is a need for fast, bright, low-powered mechanically actuated displays that can be driven at high speeds and low voltages for improved image quality and reduced power consumption in the field of micro-electromechanical systems, particularly for mechanical light modulators used in displays.
Innovation Solution
A MEMS device with a mechanical light modulator supported by compliant narrow beams that form a loop or actuator, connected to a substrate via an anchor, and manufactured using a method involving the deposition and etching of mold materials to create enclosed spaces, allowing for efficient actuation and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional manufacturing processes are used for mechanical light modulators, then manufacturing complexity increases with multiple photolithographic masks, but manufacturing precision and device performance can be achieved
Solution Approach 1:
The patent combines multiple manufacturing steps into a single photolithographic mask process. The first mask simultaneously defines the narrow beam pattern, the enclosed space boundary, and the anchor positions, eliminating the need for separate masks for each feature and simplifying the overall manufacturing process while maintaining precise geometric control
Solution Approach 2:
The patent uses a sacrificial layer deposited and patterned before the main structural layer. This preliminary action creates a mold that guides the formation of the narrow beam and enclosed space, allowing complex geometries to be formed with simpler subsequent processing steps and reducing the total number of photolithographic masks required
2Speed
If higher actuation voltages are used, then faster switching speeds can be achieved, but power consumption increases
Solution Approach 1:
The patent changes the geometric parameters of the compliant beam structure, specifically using narrow beam widths and optimized enclosed space dimensions. These parameter changes increase the mechanical compliance and reduce the actuation force required, enabling faster switching at lower voltages and reducing power consumption while maintaining high-speed performance
Data Source
AI summary
The invention relates, in various aspects, to systems and methods for MEMS actuated displays that can be driven at high speeds and at low voltages for improved image quality and reduced power consumption.