in the analytical form and using the boundary conditions (\[BCsF\]), (\[BCSF\]) on sF and FS interfaces we can reduce the problem to the solution of Ginzburg-Landau (GL) equations in the s and S layers. We limit our analysis by considering the most interesting case when the following condition is fulfilled: $$\Gamma _{BI}=\frac{\gamma _{BI}\xi _{S}}{\xi _{S}(T)}\gg 1,  \label{GammaBB1}$$and when there is strong suppression of superconductivity in the vicinity of the sF and FS interfaces. The latter takes place if the parameter $\Gamma $ $$\Gamma =\frac{\gamma \xi _{S}(T)}{\xi _{S}},~\xi _{S}(T)=\frac{\pi \xi _{S}}{2\sqrt{1-T/T_{C}}}  \label{GammasB1}$$satisfies the conditions $$\Gamma p\gg 1,~\Gamma q\gg 1.  \label{condSup}$$Here $$\begin{aligned}
p^{-1} &=&\frac{8}{\pi ^{2}}\operatorname{\mathop{\mathrm{Re}}}\sum_{\omega =0}^{\infty }\frac{1}{\Omega ^{2}\sqrt{\widetilde{\Omega }}\coth \frac{d_{F}\sqrt{\widetilde{\Omega }}}{2\xi
_{F}}},  \label{Sums11} \\
q^{-1} &=&\frac{8}{\pi ^{2}}\operatorname{\mathop{\mathrm{Re}}}\sum_{\omega =0}^{\infty }\frac{1}{\Omega ^{2}\sqrt{\widetilde{\Omega }}\tanh \frac{d_{F}\sqrt{\widetilde{\Omega }}}{2\xi
_{F}}}.  \label{Sums12}\end{aligned}$$

Note that in the limit $h=H/\pi T_{C}\gg 1$ and $d_{F}\gg \sqrt{2/h}\xi _{F}$ the sums in (\[Sums11\]), (\[Sums12\]) can be evaluated analytically resulting in $$\beta =\frac{p-q}{p+q}=\sqrt{8}\sin \left( \frac{d_{F}}{\xi _{F}}\sqrt{\frac{h}{2}}+\frac{3\pi }{4}\right) \exp \left( -\frac{d_{F}}{\xi _{F}}\sqrt{\frac{h}{2}}\right) ,  \label{pq1}$$$$p+q=2\sqrt{2h}\left( T/T_{C}\right) ^{2},~\ \ \ pq=2h\left( T/T_{C}\right)
^{4}.\ \   \label{pq2}$$

In general, the phases of the order parameters in s and S films are functions of the coordinate $x$. In the considered approximation the terms that take into account the coordinate dependence of 