Optical communication module and method of manufacturing the same

A method of manufacturing an optical communication module comprising:

• forming a metal block having a stair structure including a first top surface and a second top surface lower than the first top surface;
• forming an optical device adhesive block on the second top surface of the metal block;
• attaching an electrical device on the first top surface of the metal block;
• attaching a waveguide type optical device on the top surface of the optical device adhesive block;
• connecting the electrical device and the waveguide type optical device to each other using a bonding interconnection;
• and
• attaching a flat type optical waveguide on one side of the optical device adhesive block,
• wherein the flat type optical waveguide is optically aligned with a waveguide of the waveguide type optical device.