\(w_{\max}=\frac{210}{n}\)
The effects of the linewidth L and the number of lines n on the amplitude d and half-wavelength w of the cross-sectional corrugation were verified based on measured values. In an experiment, 60 SCSs were fabricated by changing L by 1 mm in the range of 1–15 mm for each structure with n = 4, 6, 8, and 10. Then, the amplitude d and the half-wavelength w of the cross-sectional corrugation were measured. Figure 2d shows the results of the experiment, with the amplitude d as a circle plot and the half-wavelength w as a cross plot. To improve legibility, the horizontal axis is set to i, which is determined by L and n from Equation (1). From the blue plot (n = 4), as i decreases, L increases. Subsequently, d increases, and w decreases. The trend was the same for all the structures with n = 6, 8, or 10. Additionally, as n increased, the amount of change in amplitude and half-wavelength with linewidth decreased due to the decrease in the length of paper that can be used to form one half-wavelength wmax.