LMA - Linear MicroElectrode Array

LMA - Linear MicroElectrode Array
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The LMA - Linear MicroElectrode Array has been developed to assist the neuroscience community with a probe that provides multiple contacts along one or more shafts.

The LMAs are fabricated using Polyimide insulated Platinum/Iridium wire that is uniquely threaded through Polyimide tubing. Holes in the Polyimide tube are formed by sophisticated laser drilling at precise intervals providing electrode spacing down to 75 microns. 

  • A probe may contain from 4 to 24 contact sites
  • Contact sites are platinum/iridium metal
  • Up to 192 contacts distributed in an 8 probe LMA-MP array
  • Distance between electrode contacts from 0.075 to 1.0 mm
  • Impedance values available from 0.1 to 1.0 megohms
  • Diameter of contact sites are 12.5, 25, 37.5 and 50 µm
  • Rugged design, reusable for multiple acute experiments
  • Sharpened Tungsten needle provides additional stiffness for easy penetration of the probe through Dural membrane
  • Diameter of the probe will depend of number of sites and diameter of the electrode contact sites
  • For longer probe lengths a SS tube is integrated above the Polyimide probe, adding stiffness and durability to the LMA
  • LMA designs are adaptable to a large number of connector types

There are  3 different configurations of the LMA in order to satisfy the varying experimental protocols for acute as well as chronic applications. These different configurations have been identified by designating the model numbers as follows:

LMAa single probe with up to 24 contact sites
LMA-MPhaving up to 8 probes with up to 24 contact sites for each probe
LMA-FCwhich is similar to the LMA-MP except that the individual probes are tethered by a flexible cable design exclusively for chronic applications

The LMA single probe design has been designed to offer extreme versatility for both chronic and acute applications. Because of its rugged design characteristics it can be used for more than 20 acute experimental trials depending on the care in handling and following the cleaning instructions after each use. The LMA uses only biocompatible materials and is very well suited for chronic applications as well.


The LMA-MP multi-probe design allows the researcher to specify up to 8 single probes with the same design characteristics as the single probe design. The juxtaposition of each probe within the array is determined by the user specifications. It can be used for both acute and chronic applications as well.


The LMA-FC is also a multi-probe design; however, the probes are tethered by flexible silicone encapsulated cables, which will allow the individual probes to be semi “floating” in brain for chronic applications.

Copyright © 2011 Global Biotech Inc.