Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/14852

TitleA microinjected 3-axis thermal accelerometer
Author(s)Rocha, L. A.
Silva, C. S.
Cerqueira, M. F.
Ribeiro, J. F.
Gonçalves, L. M.
Pontes, A. J.
Viana, J. C.
KeywordsThermal accelerometer
Polymer microtechnologies
Microsensors
Microinjection
Issue date4-Sep-2011
PublisherElsevier
Abstract(s)A completely new approach for the fabrication of 3-axis thermal accelerometers is presented in this paper. Micromolded polystyrene micro-parts are assembled with polyimide membranes enabling the construction of thermal accelerometers. The use of polymers (polystyrene and polyimide) with low thermal conductivities improves the overall power consumption of the thermal accelerometer and enables a simple and low-cost fabrication process (no clean room infrastructure required). The accelerometer is composed of 4 polystyrene microinjected structural microparts (two identical top parts and two identical central parts) and three polyimide membranes (two identical z-axis membranes and a central membrane). The microinjected parts provide the mechanical support for the active elements that are placed on the membranes (the heater and the temperature sensors). Coupled 3D thermo-electric-fluidic FEM simulations show that current design has a sensitivity of 1.6ºC/g in the X-Y directions and 0.2ºC/g in the Z direction for a central heater temperature of 300ºC.
TypeConference paper
URIhttp://hdl.handle.net/1822/14852
Publisher versionhttp://www.sciencedirect.com/
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CAlg - Artigos em livros de atas/Papers in proceedings
DEI - Artigos em atas de congressos internacionais
IPC - Resumos alargados em actas de encontros científicos internacionais com arbitragem

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