First of all, I'm apologize so much for the delay about to propose a better way to create the cover for a UNAM thesis.
The delay was caused because I was tracking the link with the information that helped me to determine a better way to make a cover page. The searching of this link was essential, because it's important to be grateful when somebody share her/his time and work with the goal to help somebody else.
Well, the information for the question
Centered title page in twoside report
helped me to define a better cover. The approach suggested by schlamar in the previous link it's the following
- Separate the creation of the cover.
- Include the cover with pdfpages.
With the help of this approach, I define the following cover with a better size and presentation
\documentclass[
fontsize=11pt,
a4paper
]{scrbook}
\usepackage{bold-extra}
\usepackage[utf8]{inputenc}
\usepackage[a4paper,includeall,bindingoffset=0cm,margin=2cm,
marginparsep=0cm,marginparwidth=0cm]{geometry}
\usepackage{graphicx}
\begin{document}
\begin{titlepage}
\thispagestyle{empty}
\begin{minipage}[c][0.17\textheight][c]{0.25\textwidth}
\begin{center}
\includegraphics[width=3.5cm, height=3.5cm]{unam}
\end{center}
\end{minipage}
\begin{minipage}[c][0.17\textheight][t]{0.65\textwidth}
\begin{center}
\vspace{.3cm}
\textsc{\large Universidad Nacional Aut\'onoma de M\'exico}\\[0.5cm]
\vspace{.3cm}
\hrule height2.5pt
\vspace{.1cm}
\hrule height1pt
\vspace{.8cm}
\textsc{\LARGE Facultad de Ciencias}\\[0.5cm] %
\end{center}
\end{minipage}
\begin{minipage}[c][0.81\textheight][t]{0.25\textwidth}
\vspace*{5mm}
\begin{center}
\hskip2pt
\vrule width2.5pt height13cm
\hskip1mm
\vrule width1pt height13cm \\
\includegraphics[height=5cm]{escudoFC}
\end{center}
\end{minipage}
\begin{minipage}[c][0.81\textheight][t]{0.65\textwidth}
\begin{center}
\vspace{1cm}
{\Huge\scshape Title}\\[.2in]
\vspace{2cm}
\textsc{\LARGE TESIS}\\[0.5cm]
\textsc{\large que para obtener el t\'itulo de}\\[0.5cm]
\textsc{\large t\'itulo}\\[0.5cm]
\textsc{\large presenta}\\[0.5cm]
\textsc{\large \textbf{Nombre del tesista}}\\[2cm]
\vspace{0.5cm}
{\large\scshape Director del trabajo:\\[0.3cm] {Nombre del director del trabajo}}\\[.2in]
\vspace{0.5cm}
{Lugar,}{ }{Fecha}
\end{center}
\end{minipage}
\end{titlepage}
\end{document}
The following code it's a way of how to include the cover
\documentclass{book}
\usepackage{pdfpages}
\usepackage{lipsum}
\begin{document}
\includepdf{cover.pdf}
\chapter{Chapter 1}
\lipsum[1]
\end{document}
The following image compares the two cover pages proposed in this question, showing that the second approach it's better.
