Asylum Research cypher - 8 Conductive AFM (ORCA); Parts List

Ch. 8. Conductive AFM (ORCA)
8. Conductive AFM (ORCA)
CHAPTER REV. 1659, DATED 10/07/2013, 22:54. USER GUIDE REV. 1714, DATED 10/25/2013, 20:36.
Chapter Contents
8.1 Parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
8.2 The ORCA Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
8.2.1 Single Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
8.2.2 Dual Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
8.3 Preparing for Imaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
8.3.1 Zeroing the ORCA Current and Sample Bias signals . . . . . . . . . . . . . . . 96
8.3.1.1 Zeroing the ORCA current signal . . . . . . . . . . . . . . . . . . . 96
8.3.1.2 Zeroing the Sample Bias . . . . . . . . . . . . . . . . . . . . . . . 97
8.3.2 Preparing the Sample . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
8.3.2.1 Install the sample on the scanner and connect the bias lead . . . . . 98
8.3.3 Mounting the Cantilever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
8.4 Imaging with the ORCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
8.5 Testing the ORCA Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
8.5.0.1 Testing the first gain stage of a Dual Gain ORCA Amplifier . . . . . . 101
This chapter explains the use of the ORCA cantilever holder. In practical terms, the ORCA cantilever
holder is simply a standard air cantilever holder with the addition of a current to voltage converting
amplifier.
Basic AC and Contact mode imaging can be performed with the ORCA holder. One major difference
in its construction however is the use of the electrical connection to the cantilever spring clip. The
cantilever clip is used as a connection to the input of the current amplifier rather than a connection to
a bias voltage source. Because of this difference, the ORCA holder will not work for measurement
techniques where the tip needs to be biased.
Note
EFM (Electric Force Microscopy), Surface Potential - SKPM (Kelvin Probe
Microscopy), PFM( Piezoelectric Force Microscopy) imaging techniques require
the use of the standard air cantilever holder.
8.1. Parts list
The following items are included in the ORCA cantilever holder kit. These accessories are included in
both the single and dual gain versions of the holder.
DRAFT
Page 92