out.tex

\documentclass[]{article}%
\usepackage[T1]{fontenc}%
\usepackage[utf8]{inputenc}%
\usepackage[]{lmodern}%
\usepackage[]{textcomp}%
\usepackage[margin =5pt, paperwidth =300pt, paperheight =300pt]{geometry}%
\usepackage[]{amsmath}%
\usepackage[]{amsfonts}%
\usepackage[]{amssymb}%
\usepackage[]{tabularx}%
\usepackage[]{multirow}%
\usepackage[]{graphics}%
\usepackage[]{graphicx}%
\usepackage[]{ragged2e}%
\usepackage{array}%
\newcolumntype{L}[1]{>{\raggedright\let\newline\\\arraybackslash\hspace{0pt}}m{#1}}%
\newcolumntype{C}[1]{>{\centering\let\newline\\\arraybackslash\hspace{0pt}}m{#1}}%
\newcolumntype{R}[1]{>{\raggedleft\let\newline\\\arraybackslash\hspace{0pt}}m{#1}}%
%
%
%
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\begin{document}%
\normalsize%
\begin{table}[!h]
\begin{minipage}[b]{200px}%
\addtolength{\tabcolsep}{-5pt}
\setlength{\arrayrulewidth}{0.1pt}
\fontsize{4px}{6px}\selectfont
\begin{tabular*}{200px}{C{40px} C{40px} C{40px} C{40px} C{40px}}
\multicolumn{5}{|c|}{TOP}\\\cline{1-1}\cline{2-2}\cline{4-4}\cline{5-5}
\multicolumn{1}{|C{40px}|}{a}&\multicolumn{1}{|C{40px}|}{b}&\multirow{2}{*}{\fontsize{8}{10}\selectfont $\Omega$}&\multicolumn{1}{|C{40px}|}{f}&\multicolumn{1}{|C{40px}|}{g}\\\cline{1-1}\cline{2-2}\cline{4-4}\cline{5-5}
\multicolumn{1}{|C{40px}|}{c}&\multicolumn{1}{|C{40px}|}{d}&&\multicolumn{1}{|C{40px}|}{h}&\multicolumn{1}{|C{40px}|}{i}\\\cline{1-1}\cline{2-2}\cline{4-4}\cline{5-5}
\multicolumn{5}{|c|}{BOT}\\
\end{tabular*}
\end{minipage}
\end{table}
\end{document}