User`s guide

10-4 Agilent 4155C/4156C User’s Guide Vol.2, Edition 6
Connecting Measurement Devices
Using Test Fixture
Connections for High Current Measurements
When you force or measure a large current, you may want to use a Kelvin (4-wire)
connection to eliminate the residual resistance effects of test leads and contacts. For
example, you can use the following connections as Kelvin connections on the test
fixture. The Kelvin connection is available for the 4156C’s HRSMU and
41501A/B’s HPSMU.
Examples: Kelvin Connection
To cancel the effects of the residual resistance, test leads must be connected as close
as possible to the DUT.
SMU(±200V= 1A Max)
SenseForce
Guard Guard
1
SenseForce
Guard Guard
2
SenseForce
Guard Guard
3 (Selected)
Gate
Source
Drain
Substrate