Biochip including side emitting-type light-emitting device and fabrication method thereof

A method for fabricating a biochip including a side emitting light-emitting device, the method comprising the steps of:

• forming on a semiconductor substrate an image sensor layer having a plurality of photodetectors;
• forming a bio-layer having a light-emitting device and a plurality of reaction regions;
• and
• depositing the bio-layer over the image sensor layer,
• wherein the step of forming the bio-layer comprises the steps of:
• forming a light-emitting device layer having formed therein a plurality of the light-emitting devices, each having reflective layers over and under a light-emitting region;
• and
• forming the plurality of reaction regions by etching light-emitting device layer portions in which the light-emitting devices were not formed,
• wherein the step of forming the light-emitting device layer comprises the steps of:
• forming a first reflective layer on a substrate;
• forming on portions of the first reflective layer a light-emitting layer having the light-emitting regions;
• and
• forming a second reflective layer on the light-emitting layer,
• wherein the step of forming the reaction regions is a step of forming the reaction regions passing through the second reflective layer, the light-emitting device layer and the first reflective layer by dry- or wet-etching of the light-emitting device layer portions in which the light-emitting device was not formed.