C31 

  

Images

Focus Ion Beam Milling

Date:  8.04.04

Feature Radius target         [actual]  Mill current  Mill time (seconds) Magnification
Pinhole course mill 4 microns 449 pA 300 sec  
Pinhole Fine Mill 5.0 microns 449 pA  300 second  

Metal Films

Front side (membrane side)
Back side (pit side)  2.0 microns of gold (Metallica#4)

Membrane Specifications

Size (micrometers)  200 x 200
Thickness (nm) 100
Frame size (mm) 5x5
Frame thickness (micrometers) 200
   

Comments:  See Vol. 4 page 28   Note that no electron microscopy was done on the reverse side before the pinhole was shipped