Wireless biosensors for artificial organs

P. Ahrens, A. Ishikawa, N. Takeda, S. Ahn, R. Eberhart

Research output: Contribution to journalArticle

Abstract

A revolution in biomedical semiconductor technology is in process, based on the development of 3D integrated circuits (IC). Novel mask-less photolithographic technology has made it possible to map IC onto the surface of single crystal silicon microspheres as small as 0.5 mm. Over 90% of the spherical surface of a 1 mm diam. IC has been mapped, providing 3 times the area available for planar IC mapping. Continuous copper circuit windings have been fabricated on the surfaces of these microspheres, making high inductance R-L-C circuits feasible. Thus wireless, two-way RF communication with microcircuitry implanted within the body is permitted. 3D IC fabrication is achieved in a continuous process, avoiding expensive planar chip wafer foundries. Many types of biomedical microsensors are feasible. Shown is a 1.1mm 3D accelerometer, with a floating ball centered electrostatically within a spherical annulus. Ball displacement by acceleration force in any direction (fluid flow, muscle contraction, etc.) is sensed by a 6 pole capacitance bridge: three pole regions are depicted in the figure. An RF microsphere amplifier with built-in spherical coil antenna (not shown) attaches to gold bumps at the bottom of the sensor. Microsensors of this type may improve the monitoring and control of artificial internal organs.

Original languageEnglish (US)
Pages (from-to)227
Number of pages1
JournalASAIO Journal
Volume46
Issue number2
StatePublished - Mar 2000

Fingerprint

Artificial Organs
Artificial organs
Biosensing Techniques
Microspheres
Biosensors
Integrated circuits
Microsensors
Poles
Semiconductors
Biomedical Technology
Networks (circuits)
Foundries
Silicon
Masks
Muscle Contraction
Accelerometers
Gold
Inductance
Muscle
Flow of fluids

ASJC Scopus subject areas

  • Biophysics
  • Bioengineering

Cite this

Ahrens, P., Ishikawa, A., Takeda, N., Ahn, S., & Eberhart, R. (2000). Wireless biosensors for artificial organs. ASAIO Journal, 46(2), 227.

Wireless biosensors for artificial organs. / Ahrens, P.; Ishikawa, A.; Takeda, N.; Ahn, S.; Eberhart, R.

In: ASAIO Journal, Vol. 46, No. 2, 03.2000, p. 227.

Research output: Contribution to journalArticle

Ahrens, P, Ishikawa, A, Takeda, N, Ahn, S & Eberhart, R 2000, 'Wireless biosensors for artificial organs', ASAIO Journal, vol. 46, no. 2, pp. 227.
Ahrens P, Ishikawa A, Takeda N, Ahn S, Eberhart R. Wireless biosensors for artificial organs. ASAIO Journal. 2000 Mar;46(2):227.
Ahrens, P. ; Ishikawa, A. ; Takeda, N. ; Ahn, S. ; Eberhart, R. / Wireless biosensors for artificial organs. In: ASAIO Journal. 2000 ; Vol. 46, No. 2. pp. 227.
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