17 research outputs found
0-level Vacuum Packaging RT Process for MEMS Resonators
A new Room Temperature (RT) 0-level vacuum package is demonstrated in this
work, using amorphous silicon (aSi) as sacrificial layer and SiO2 as structural
layer. The process is compatible with most of MEMS resonators and Resonant
Suspended-Gate MOSFET [1] fabrication processes. This paper presents a study on
the influence of releasing hole dimensions on the releasing time and hole
clogging. It discusses mass production compatibility in terms of packaging
stress during back-end plastic injection process. The packaging is done at room
temperature making it fully compatible with IC-processed wafers and avoiding
any subsequent degradation of the active devices.Comment: Submitted on behalf of EDA Publishing Association
(http://irevues.inist.fr/EDA-Publishing
Silicon on Nothing Mems Electromechanical Resonator
The very significant growth of the wireless communication industry has
spawned tremendous interest in the development of high performances radio
frequencies (RF) components. Micro Electro Mechanical Systems (MEMS) are good
candidates to allow reconfigurable RF functions such as filters, oscillators or
antennas. This paper will focus on the MEMS electromechanical resonators which
show interesting performances to replace SAW filters or quartz reference
oscillators, allowing smaller integrated functions with lower power
consumption. The resonant frequency depends on the material properties, such as
Young's modulus and density, and on the movable mechanical structure dimensions
(beam length defined by photolithography). Thus, it is possible to obtain multi
frequencies resonators on a wafer. The resonator performance (frequency,
quality factor) strongly depends on the environment, like moisture or pressure,
which imply the need for a vacuum package. This paper will present first
resonator mechanisms and mechanical behaviors followed by state of the art
descriptions with applications and specifications overview. Then MEMS resonator
developments at STMicroelectronics including FEM analysis, technological
developments and characterization are detailed.Comment: Submitted on behalf of EDA Publishing Association
(http://irevues.inist.fr/EDA-Publishing
6. MEMS based color-VGA micro-projector system
This paper presents a complete portable laser-based projection system using twofold of one dimensional magnetic actuated MEMS linear scanning micro-mirrors. Dedicated high speed electronics was developed to drive the MEMS, detect the mirror scanning position at any time and synchronize the two mirrors and the laser pulsation. The achieved projection system head is 4.5 cm3 and is able to project colorful static images and videos (50 fps) with projection size of 50 cm diagonal at 50 cm distance with VGA (640Ă—480 px) resolution
0-level Vacuum Packaging RT Process for MEMS Resonators
A new Room Temperature (RT) 0-level vacuum package is demonstrated in this work, using amorphous silicon (aSi) as sacrificial layer and SiO2 as structural layer. The process is compatible with most of MEMS resonators and Resonant Suspended-Gate MOSFET [1] fabrication processes. This paper presents a study on the influence of releasing hole dimensions on the releasing time and hole clogging. It discusses mass production compatibility in terms of packaging stress during back-end plastic injection process. The packaging is done at room temperature making it fully compatible with IC-processed wafers and avoiding any subsequent degradation of the active devices
Micro-beamer based on MEMS micro-mirrors and laser light source
This paper presents a complete portable laser-based projection system using two one-dimensional magnetic actuated MEMS linear scanning micro-mirrors. Dedicated high speed electronics was developed to drive the MEMS, detect the mirror scanning position at any time and synchronize the two mirrors and the laser pulsation. The achieved projection system head is 3 cm3 and is able to project static images and videos with projection size of 50 cm diagonal at 50 cm distance with 32x32 px resolution, the resolution is only limited by current optical setup. The circuit building blocks itself can project image with resolution up to QVGA (320x240 px), suitable for information display applications. © 2009