Hitachi Microscope & Magnifier S-4800 Manual De Usuario

4-

4

(7) After completion of heating, wait for 10 to 15 minutes and introduce air into the vacuum 

evaporator.    Then remove the aperture plate with tweezers. 

 
  NOTICE:  Do not touch to aperture plate directly by hand. 
 
(8) To further improve image quality at low accelerating voltages, coat both sides of the aperture 

plate with platinum-palladium (Pt-Pd) or gold- palladium (Au-Pd) to a thickness of 10 to 20 nm 
using an ion coater after heating the aperture plate.   
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Aperture plate

Molybdenum board

(533-1337)

Fig. 4-2    Baking of Aperture Plate