Prakt. Met. Sonderband 46 (2014) 33
(Fig. 6): The lamella is mounted under an axial inclination of 45° with respect to the non-
tilted sample stage in a holder that again allows for repeatable 90° sample rotation around
four steps (see the length axis (a). In a first step, coarse slots are cut into the 45° inclined lamella (b). Next
re rough cut into the sample is re-mounted after 90° axial rotation and the perpendicular slots are cut (c).
ted by 90° along The remnant tips of the initial lamella that were hidden by the coarse structured
equent step, the compression specimens are subsequently removed in a top down milling step (d). To this
ioother polished purpose, the sample is mounted with the specimens’ compression direction parallel to the
(d). Finally, the ion beam. After this, the sample is put back in the previous position and the two
1g to the desired perpendicular sample sides are subsequently finished by fine polishing as outlined before
(e, f).
um
Fig. 6: Sequential steps to prepare a series of compression samples by FIB along an
lectrochemically electrochemically prepared lamella.
Notably, the fact that three corners of a square cross-section specimen are visible during
d that the needle in situ deformation rather than only two for the case of un-rotated pillars increases the
epeated rotation information that can be gained during such experiments.
men is fabricated
om all directions
scatter diffraction 3. APPLICATIONS
uch samples can
Lastly, we would like to show some applications of the introduced techniques in order to
give an idea of what is possible within few hours and using rather simple techniques. Fig.
7a shows a broad ion beam thinned piece of single crystal W [23], where the extended
dimensions of the thinned area are clearly visible. The preparation of a free-standing
lamella with a thin film on top of a Si substrate [25] is shown in Fig. 7b. Within this thin
a well controlled lamella, a bending beam (Fig. 7c) is FIB fabricated to measure the stresses in the thin film
jed to place the from the resulting beam curvature [25, 34]. Fig. 7d shows a series of lithographically
7]. This would be prepared Cu stencil masks [14] placed on top of an Al lamella, while Fig. 7e and f present
n one to another samples fabricated by this mask aided ion milling approach from rolled 16 pm thick Cu foil
ps are as follows and a 20 pm thick PET film, respectively. These samples can subsequently be tested
under the optical microscope or in situ in the scanning electron microscope without
requirement for further FIB machining or polishing. At last, Fig. 7g presents a series of
3