Technologies/IPs

19 05, 2017

Micro-fluidic Lab-on-a-chip Sensor to Detect and Monitor Viscosities for a Variety of Biochemical Applications

May 19th, 2017|

Measurement of viscosity plays an important role in the quality control at various research and development stages in a lab as well as a wide range of industries including food, chemical, healthcare, pharmaceutical, petrochemical, cosmetics, paint, ink, coatings, oil and automotive industries. A portable passive and electronic version of micro-viscometer is developed (Fig. 1) which has [...]

19 05, 2017

MEMS Pressure Sensor

May 19th, 2017|

A pressure sensor for Micro Air Vehicle (MAV) application was developed. The pressure sensor structure consists of four diffused polysilicon piezoresistors placed on a diaphragm fabricated by bulk micromachining and connected in Wheatstone bridge. Pressure sensors are fabricated for a pressure range of 0-1.1 bar and the meander shaped piezoresistors are placed at optimized highstress regions. [...]

19 05, 2017

Green Gap LEDs

May 19th, 2017|

Under DST (India)-Japan Society for the Promotion of Science (JSPS) collaborative project, a green gap broadband emitter has been developed to achieve a broad emission in the yellow-green region for GaN-InGaN LEDs, using single InGaN/AlN nano-disk, sandwiched between n-GaN and p-GaN epitaxial layers grown by MOCVD. Self-assembled InGaN/AlN structure was grown on a single-sided polished c-plane [...]

19 05, 2017

Alternate current (AC)-based GaN blue lightemitting diodes (LEDs)

May 19th, 2017|

An AC-based GaN blue light-emitting diodes (LEDs) with different designs (series and Wheatstone Bridge configurations) were successfully fabricated and demonstrated at wafer and chip level under CSIR network (R-Nano) programme. In the first design, 42 micro-LED chips were connected in a series for a high voltage operation, where the size of each chip was ~ 250 [...]

19 05, 2017

Photonic Crystal structures and waveguides on silicon-on-insulator (SOI) substrates

May 19th, 2017|

Under CSIR network (R-Nano) programme, various photonic crystal (PhC) structures and waveguides including line-defect, coupled cavity and ring-type PhC structures on silicon-on-insulator (SOI) substrates were designed using finite difference time domain (FDTD) method. These structures could be used as a refractive index based sensor platform for chemical and bio-chemical sensing applications. Fig. 1 shows one of [...]

19 05, 2017

GaN-based High Electron Mobility Transistors (HEMTs)

May 19th, 2017|

GaN-based high electron mobility transistor (HEMT) was developed under a CSIRsponsored project for bio-sensing applications.The device has a source-drain distance (Lsd) of 50 μm and a unit gate width of 2x125 μm and 2x50 μm. Various gateless and gated devices having Lsd variations from 7.0 μm to 50 μm are electrically tested to check the maximum [...]

19 05, 2017

GaN/InGaN based Blue LEDs and Solar cells

May 19th, 2017|

Under CSIR-TAPSUN programme, an improved design by incorporating ITO/ graphene as current spreading layers was carried out forenhancement of light extraction. LED epilayer structures having 9 and 10 QWs with or without strain-releasing superlattice (SL) structures weregrown on the single side polished (SSP), double side polished (DSP) and patterned sapphire substrates (PSS) by MOCVD and characterised.Preliminary [...]

19 05, 2017

Fabrication of SWCNT Based Flexible Chemiresistor

May 19th, 2017|

Carbon Nanotubes (CNT) based chemiresistors are one of the fundamental building blocks of the advanced nanosensors for applications in gas sensing and biosensing. Low-temperature fabrication process allows to develop large area flexible sensors for different applications such as environment pollution monitoring, gas leakage, food quality, smart textile, biosensing etc. These sensors are flexible, lightweight and affordable [...]

19 05, 2017

RF MEMS Switches

May 19th, 2017|

RF MEMS devices developed at CSIR CEERI have shown great potential in strategic, mobile and medical applications. The compact, lightweight (micrograms) and highly energy efficient devices can be used in earth-bound communication stations (in Satellite Payloads), hand-held communication systems, missile communication or smart munition (in RF front ends for communication), medical diagnostics (in MRIs for Digital [...]

19 05, 2017

MEMS Micromirror Devices for Optical Applications

May 19th, 2017|

MEMS Micromirror devices find numerous applications in the field of projection displays, adaptive optics, MEMS scanners, multi-object spectroscopy, optical switches, coherence tomography and projection lithography. Most of these devices are used for angular deflection of light by torsional deflection of micromirror or axial modulation of light by piston motion of micromirror. Motions in both cases is [...]