Micropressure sensor fabrication without problem of stiction for a wider range of measurement

The objective of this paper is to present a novel fabrication process for one or arrays of micropressure sensors. The fabrication process is almost the reverse of the surface micromachining process used for the pressure sensor. This allows the use of SU-8 to form cavity that can be much deeper for pressure measurement. Thus, the sensor made can provide a much wider range of pressure measurement. The fabrication process allows arrays of pressure sensors integrated into a complicated microchannel system for detailed pressure flow measurements. The fabrication process has completely absence of diaphragm stiction. Theoretical analysis for the stress and deformation of the pressure sensor diaphragm is derived and used for diaphragm design calculation. More detailed design and fabrication techniques developed for this sensor is presented.