Micro Electro Mechanical Systems (MEMS) are driving the merger of various sensing capabilities into a single device, and are used in many different applications. Largely employed in the handheld sector which is driving MEMS growth, smartphones today can contain as many as ten to twelve — or even more — MEMS devices, with this number projected to grow in the coming years.
Manufacturing MEMS devices is a balancing act, as MEMS die are very sensitive and fragile. Too much stress from die bonding may crack the die and, if the bonding adhesive’s modulus is high, the die can bend due to stress. This flex can cause the moving parts of the MEMS to go out of calibration. To accommodate these stress and modulus challenges, Henkel has developed a silicone material technology for MEMS devices which offers a low and stable modulus across the reflow profile. The material has no bleed and higher adhesion strength than previous-generation adhesives and is completely customizable. The unique silicone platform has been developed with freedom to tweak not only the rheological properties, but also other key material properties such as modulus from 0.1 to 200 MPa. Different color samples can also be developed based on the customer requirements.
Authors: Raj Peddi, Wei Yao