Novel Bonding technologies for wafer-level transparent packaging of MOEMS

TL;DR

This paper discusses innovative bonding technologies for wafer-level transparent packaging of MOEMS, aiming to reduce costs, improve reliability, and standardize testing procedures to accelerate MEMS device commercialization.

Contribution

It introduces new bonding techniques specifically designed for wafer-level transparent packaging of MOEMS, addressing cost and standardization challenges.

Findings

New bonding methods enable cost-effective wafer-level packaging.

Enhanced transparency and reliability of MOEMS packaging.

Potential for faster commercialization of MEMS devices.

Abstract

Depending on the type of Micro-Electro-Mechanical System (MEMS), packaging costs are contributing up to 80% of the total device cost. Each MEMS device category, its function and operational environment will individually dictate the packaging requirement. Due to the lack of standardized testing procedures, the reliability of those MEMS packages sometimes can only be proven by taking into consideration its functionality over lifetime. Innovation with regards to cost reduction and standardization in the field of packaging is therefore of utmost importance to the speed of commercialisation of MEMS devices. Nowadays heavily driven by consumer applications the MEMS device market is forecasted to enjoy a compound annual growth rate (CAGR) above 13%, which is when compared to the IC device market, an outstanding growth rate. Nevertheless this forecasted value can drift upwards or downwards depending on the rate of innovation in the field of packaging. MEMS devices typically require a specific fabrication process where the device wafer is bonded to a second wafer which effectively encapsulates the MEMS structure. This method leaves the device free to move within a vacuum or an inert gas atmosphere.