An absolute pressure sensor device used in an automotive side airbag application

Using the cavity molding technology a pre-molded cavity was created in a SOIC 20 JEDEC outline package in which we mounted and assembled an ultra-small pressure sensor.

To seal the pressure sensor port from the environment the cavity was filled with a special gel that passes on any environmental pressure to the sensor. The adjacent signal processing ASIC in the same package is completely encapsulated by compound.  This functional assembly is applied in the doors of a vehicle to detect a side impact.