I_6.2/I_11.3 ratio compared to MIR spectral index (F₃₀/F_13.5). Ionized PAHs are traced by a high I_6.2/I_11.3 ratio. The wider range in the I_6.2/I_11.3 ratio in flaring/transitional disks (⟨ I_6.2/I_11.3 ⟩  = 2.61 ± 1.63) suggests that the PAH emission originates in a wider range of physical environments while the origin of PAH emission in flat disks (⟨ I_6.2/I_11.3 ⟩  = 2.08 ± 0.56) seems to be more homogeneous. The parameters of all the objects are listed in Table 1.