Image sensor and method for manufacturing the same

A method of manufacturing an image sensor comprising the steps of:

• forming first to third photodiodes and first to third color filters corresponding to the first to third photodiodes;
• forming a photoresist film including photosensitive materials on the upper surfaces of the first to third color filters;
• forming a first exposed part by exposing or irradiating the photoresist film with a first exposure energy using a first pattern mask having a first light transmitting part with a first width at a first boundary between the first color filter and the second color filter and at a second boundary between the second color filter and the third color filter;
• forming a second exposed part overlapping the first exposed part by exposing or irradiating the photoresist film with a second exposure energy smaller than the first exposure energy using a second pattern mask having a second light transmitting part with a second width wider than the first width at the first and second boundaries;
• and
• forming microlenses by developing the photoresist film.