Patent ID: 6855927

Claim:
A method for observing an element distribution in which an electron beam passed through a specimen is divided in its energy in a spectroscopic manner and the element distribution is attained in reference to intensities of electron beams contained in different three energy areas, wherein the element distribution is attained by calculating R 2 ÷R 1 (δE 2 ÷δE 1 ) where a first energy area ranges from E 1 to E 1 +ΔE, a second energy area ranges from E 2 to E 2 +ΔE and a third energy area ranges from E 3 to E 3 +ΔE; a core loss electron of a target element is contained in the third energy area; equations of E 2 −E 1 =δE 1 and E 3 −E 2 =δE 2 are established; an intensity of electron beam contained in the first energy area is I 1 , an intensity of electron beam contained in the second energy area is I 2 and an intensity of electron beam contained in the third energy area is I 3 ; and equations of R 1 =I 2 ÷I 1 and R 2 =I 3 ÷I 2 are established.