Thermal management of BioMEMS

D. J. Sadler, R. Changrani, P. Roberts, Chia Fu Chou, Frederic Zenhausern

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Scopus citations

Abstract

Integrated microfluidic devices for amplification and detection of biological samples that employ closed-loop temperature monitoring and control have been demonstrated within a multilayer low temperature co-fired ceramics (LTCC) platform. Devices designed within this platform demonstrate a high level of integration including integrated microfluidic channels, thick-film screen-printed Ag-Pd heaters, surface mounted temperature sensors, and air-gaps for thermal isolation. In addition, thermal-fluidic finite element models have been developed using CFDRC ACE+ software which allow for optimization of such parameters as heater input power, fluid flow rate, sensor placement, and air-gap size and placement. Two examples of devices that make use of these concepts are provided. The first is a continuous flow polymerase chain reaction (PCR) device that requires three thermally isolated zones of 94°C, 65°C, and 72°C, and the second is an electronic DNA detection chip which requires hybridization at 35°C. Both devices contain integrated heaters and surface mount silicon transistors which function as temperature sensors. Closed loop feedback control is provided by an external PI controller that monitors the temperature dependent I-V relationship of the sensor and adjusts heater power accordingly. Experimental data confirms that better than +/- 0.5°C can be maintained for these devices irrespective of changing ambient conditions. In addition, excellent matching with model predictions has been achieved, thus providing a powerful design tool for thermal-fluidic microsystems.

Original languageEnglish (US)
Title of host publicationInterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITHERM
PublisherIEEE Computer Society
Pages1025-1032
Number of pages8
Volume2002-January
ISBN (Print)0780371526
DOIs
Publication statusPublished - 2002
Externally publishedYes
Event8th Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITHERM 2002 - San Diego, United States
Duration: May 30 2002Jun 1 2002

Other

Other8th Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITHERM 2002
CountryUnited States
CitySan Diego
Period5/30/026/1/02

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Keywords

  • Air gaps
  • Biological control systems
  • Ceramics
  • Microfluidics
  • Nonhomogeneous media
  • Temperature control
  • Temperature measurement
  • Temperature sensors
  • Thermal management
  • Thermal sensors

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

Cite this

Sadler, D. J., Changrani, R., Roberts, P., Chou, C. F., & Zenhausern, F. (2002). Thermal management of BioMEMS. In InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITHERM (Vol. 2002-January, pp. 1025-1032). [1012570] IEEE Computer Society. https://doi.org/10.1109/ITHERM.2002.1012570