Manufacturing Technology Today

K. Kiran Kumar ¹, V. A. P. Sarma ¹, N. Balashanmugam ¹, K. B. Vinaya Kumar ², G. M. Hegde ³, K. Rajanna ², M. M. Nayak ³, N. S. Dinesh ⁴

Affiliations
1 Nano Manufacturing Technology Centre, CMTI, Bangalore, IN
2 Department of Instrumentation and Applied Physics, IISc, Bangalore, IN
3 Centre for Nano Science and Engineering, IISc, Bangalore, IN
4 Department of Electronic Systems Engineering, IISc, Bangalore, IN

Abstract

In this work, we present the fabrication of hollow steel microneedles for transdermal drug delivery. Hollow steel microneedles are fabricated by laser ablation technique using femto second laser micromachining. A 4x3 array of rectangular microneedles with circular holes are fabricated. The processed hollow steel microneedles are 700 μm in height with 60 μm and 150 μm inner and outer diameters respectively.

Keywords

Micro-Needles, Steel, Femto Second Laser.

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S. N. Ram ¹, Jaspreet Singh ¹, G. Jagadeesh ¹, M. M. Nayak ², K. Nagachenchaiah ²

Affiliations
1 Dept. of Aerospace Engg, Indian Institute of Science, Bangalore, IN
2 Indian Space Research Organisation, Dept. of Space, Bangalore, IN

Abstract

This paper reports on development of MEMS based pressure sensors arrays for static pressure measurement on aerodynamic surfaces. The two different types of sensors arrays with cluster of 25 sensors and 5 sensors are developed. The characterization of pressure sensors arrays carried out in static condition and the working of sensors has been demonstrated for hypersonic flows in shock tunnel with the cluster of 5 sensors array. The static pressure measured using the MEMS sensors in shock tunnel testing are in good agreement with conventional Kulite sensors.

Keywords

Pressure Measurements, MEMS Sensors, Hypersonic Flow, Pressure Sensor.

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Shreyas P. Bhat ¹, B. Pavithra ², S. H. Bharathi ¹, M. M. Nayak ²

Affiliations
1 REVA University, Bengaluru, IN
2 Indian Institute of Science, Bengaluru, IN

Abstract

In many industrial and academic applications force, pressure and displacement are measured using strain gauges bonded with adhesives on the object to be tested. This paper presents development and performance investigation of non-intrusive self adhesive Thin Film Strain Gauges (TFSGs) for applications demanding quick gauge installation on test objects; eliminating a conventional step of applying adhesives for installation and curing. Self adhesive TFSGs of NiCr (metal alloy) and ITO (degenerate semiconductor) are fabricated. Distinction in the piezoresistive responses and gauge factor of metal alloy and degenerate semiconductor thin film strain gauges are measured and studied by cantilever beam bending method.

Keywords

Thin Film, Thin Film Strain Gauge, Self-Adhesive, Sputtering, Piezoresistivity, ITO, NiCr.

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