  Hexagonal boron nitride (hBN) is a layered dielectric material with a wide
range of applications in optics and photonics. In this work, we demonstrate a
fabrication method for few-layer hBN flakes with areas up to 5000 $\rm \mu m$.
We show that hBN in this form can be integrated with photonic microstructures:
as an example, we use a circular Bragg grating (CBG). The layer quality of the
exfoliated hBN flake on a CBG is confirmed by second-harmonic generation (SHG)
microscopy. We show that the SHG signal is uniform across the hBN sample
outside the CBG and is amplified in the centre of the CBG.
