Micro-mirror and a method for fabricating the same

A method for fabricating the micro-mirror which comprises:

• a mirror section for reflecting an incident light;
• a hinge section including a fixed section and a movable section each having a flat surface;
• a drive means having a bi-morph structure made of two or more materials having different heat expansion coefficient for deflecting said mirror section of a relative angle to said incident light;
• wherein
• said hinge section and the mirror section are integrally constructed by a structured film formed on a semiconductor substrate by utilizing crystal anisotropy of said semiconductor substrate;
• said movable section of the hinge section is formed as to be continuous from said fixed section of the hinge section and is formed so as to construct a bent slanting surface at an extended section of the fixed section of the hinge section;
• comprising the steps of:
• forming a first groove having a first skewed surface at a side wall on a front surface of said semiconductor substrate, and a second groove having a second skewed surface substantially parallel to said first skewed surface of the first groove at a position and opposite to a flat surface section around said first groove on a back surface of said semiconductor substrate;
• forming structure films at said first skewed surface of the first groove and said flat surface section around said first groove;
• forming a first drive film at one surface of said structured film;
• forming said mirror section and said hinge section made of the structured film by removing said semiconductor substrate with etching process after performing a through-hole etching of said semiconductor substrate to make one end of said structured film to be a free end at a bottom section of said first groove;
• forming a second drive film on another surface of the structured film constructing said hinge section;
• forming a metal film on said structured film constructing said mirror section and the hinge section;
• and
• forming a reflection film and an electrode pad for supplying current to said reflection film by selectively etching said metal film.