A1.3 - Patterning of thin film strain gauges on 3D-surfaces

O. Suttmann, J.F. Duesing, J. Koch, U. Stute & L. Overmeyer
Metal thin film strain gauges applied directly on the surface of components offer good long term stability even in harsh environments and at elevated temperatures. They consist of vacuum deposited isolation and sensing films. A direct-write laser patterning process based on picosecond laser pulses has been developed to overcome the restriction to 2D-surfaces caused by photolithographic patterning. We present results of tensile test of strain sensors patterned in v-notches milled in aluminum samples. The thermal...