ABTECH Scientific, Inc., - INTERDIGITATED MICROSENSOR ELECTRODES

INDEPENDENTLY ADDRESSABLE MICROBAND ELECTRODES^TM (IAMEs)
(Microfrabricated Electrode Arrays)

IME DEVICES	Line and Space, Digit Length	Designs	Conductor
IAIME 0505.3 SERIES	5 microns, 3 mm long	10 bands	Au, Pt, ITO
IAME 2004.3 SERIES	20 microns, 3 mm long	4 bands	Au, Pt, ITO
IAME 1504.3 SERIES	15 microns, 3 mm long	4 bands	Au, Pt, ITO
IAME 1004.3 SERIES	10 microns, 3 mm long	4 bands	Au, Pt, ITO
IAME 0504.3 SERIES	5 microns, 3 mm long	4 bands	Au, Pt, ITO

	IAME Brochure (152kB pdf)	IAME Price List	Price List
Introduction and Background	Applications of IAMEs	Technical Specifications	IAME Accessories	Methods	Application Notes

Introduction and Background Ø Independently Addressable Microband Electrodes (IAMEs) are inert, array microelectrodes formed from patterned conductors on an insulating substrate chip. They are designed for i) Electrical cell impedance and cell mobility studies, ii) Characterization of the electrical and optical properties of thin polymeric films and coatings, iii) Electrochemical applications in microelectrochemistry, iv) Electrical / electrochemical impedance spectroscopy, and v) Chemical and biological sensor development. Ø IAIMEs are designed with a total of ten (10) ndependently addressable microbands with five bands alternating and each interdigitated from opposing sides. Microbands of IAIME chips are 5 microns wide and 3 mm long with a band spacing of 5 microns wide. IAIME chips are available in gold, platinum and indium tin oxide. Ø IAMEs are designed with a total of four (4) independently addressable microband electrodes. Microbands and spacings of IAIME chips are available in 5, 10, 15, and 20 microns wide and 3 mm long. with band spacings also 5 microns wide. IAIME chips are available in gold, platinum and indium tin oxide. Ø In research and product development, these devices are widely used for conductimetric, chemoresistive chemical and biological sensors using electrically conducting (electroconductive) polymers, for impedance sensors based on Langmuir-Blodgett thin films, for studying environmental effects on polymer thin films, and in modern micro-electrochemistry. Ø Investigate the four-point electrical conductivity and chemoresisitive responses of transducer-active, polymeric films in the same electrode configuration, the same test environment, and on the same sample film. Back to Index Applications of IMEs Applications of IMEs in research and product development include: Ø Cell mobility testing: Study the chemotactic response of cells as they migrate across an interdigitated pattern of independently addressable electrodes. Ø Electro-chromatography: Voltage induced separation of biomolecules as they flow over the electrodes. Ø Electrical and Electrochemical Impedance Spectroscopy of organic thin films and coatings. Ø Capacitance probes and humidity sensors, e.g. based on Langmuir-Blodgett films. Ø Modern microelectrochemistry: Generator collector electrochemistry. Ø Four-point electrical conductimetry: Determine the conductivity of thin films cast onto the four parallel microbands. Back to Index Technical Specifications
	Ø Chip Substrate:	Schott D263 Borosilicate Glass
		Dielectric Constant, Epsilon(r) at 1 MHz		6.7
		Dielectric Loss Angle, tan delta, at 1 MHz		61 x 10-4
		Electrical Resistivity (50 Hz) (250 C)		1.6 x 108 ohm cm
		Coefficient of Linear Thermal Expansion, * 20-300 Deg C		7.2 x 10^-6 K^-1
		Refractive Index at 20 C, ne ( Lambda = 546.1 nm)		1.5249
	Ø Metallization:	100 Å Ti\|W / 1000 Å Au or Pt and ITO = 10 Ohms/sq

	Ø IAIME 0505.3
			Digit length, d, (microns)	2,995
			No.of digit pairs per sensor, N	5
			Digit Width, a, (microns)	05
			Interdigit Space, a, (microns)	05
			Spatial Periodicity, lambda, (microns)	20
			Zaretsky Meander Length, M, (cm)	1.50
			Center Line or Serpentine Length (cm)	2.70

	Ø IAME XX04.3 Series			2004.3	1504.3	1004.3	0504.3
			Digit length, d, (microns)	2,980	2,985	2,990	2,995
			Digit Width, a, (microns)	20	15	10	05
			Interdigit Space, a, (microns)	20	15	10	05
			Spatial Periodicity, lambda, (microns)	80	60	50	20

	Ø IME Chip Dimensions		Un-packaged Die	Packaged Die
			(l x w x t)	(l x w x t)
	IAIME 0505.3		1.50 x 3.00 x 0.05 cm	13.2 x 1.38 x 0.7 cm
	IAME XX04.3		1.00 x 2.00 x 0.05 cm	13.2 x 1.38 x 0.7 cm

	Ø Packaging
	Electrode Body:		PVC-Jacketed printed circuit board
	Encapsulant:		Epoxy header. Polyimide packaged chip.
	Leadwires:		Color coded, 28 AWG stranded copper, shielded, and PVC jacketed
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IAME Accessories (Independently Addressable Microband Electrodes)

IAME TEST CLIP	ADAPTER carrier	ADAPTER (wand)
Adapter Dimensions	1.0" x 3.0" (25.4 mm x 76.2 mm)	(0.4" x 4.5") (10.0 mm x 114.3 mm)
Connector Type	Gold Plated Pins to PCB	Gold Plated Pins to PCB
Number of Conductors	7 on each side	4 on one side
Part No.	CARRIER	WAND

Back to Index

Methods

Ø Films or coatings may be applied to the IME device by dip coating, spin casting, spray painting, air-brushing, brush painting, by Langmuir-Blodgett thin film deposition technique, by electropolymerization, and by molecular self assembly.

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Application Notes

For further information, request Application Notes or you may download application note files:

Ø Independently Addressable Microband Electrodes: Applications and References.

Independently Addressable Microband Electrodes (IAME) is the registered tradename for a family of devices developed by ABTECH. Also available, an Independently Addressable Interdigitated Microsensor Electrode (IAIME) array. These devices are microfabricated (using microelectronics fabrication techniques) to form patterns of conductors deposited on an insulating substrate chip. They are designed for cell motility studies, the simultaneous interrogation of the electrical, electrochemical, and optical properties of thin polymeric films and caotings, for applications in microelectrochemistry, and for electrical/electrochemical impedance spectroscopy.

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Contact: Ann M. Wilson, Manager,
Applications Development ABTECH Scientific, Inc.
911 East Leigh Street G24, Richmond, Virginia 23219
Telephone Number: +1-804-783-7829 Fax Number: +1-804-783-7830
e-mail: sales@abtechsci.com

Introduction and Background

Applications of IMEs

Methods