Method of fabricating micro-lens and method of fabricating optical module using the method

The present invention provides a method of preparing a microlens and a method of preparing an optical module using this method. To prepare the microlenses, forming a thin film material for the micro lenses on the substrate. Film formed on the photoresist pattern to form a thin film structure using the photoresist pattern by etching the thin film, and formed by a thin film structure of the heat-treated at reflux microlens.