Patent ID: 8951882
Filing Date: 2015-02-10
Classification: G02B,H01L

Abstract:
1. A method of fabricating an optoelectronic integrated circuit substrate, the method comprising: defining a photonic device region and an electronic device region on a first substrate; forming a first trench in the photonic device region and a second trench in the electronic device region, respectively, on a top surface of the first substrate, the first trench having a first depth and the second trench having a second depth smaller than the first depth; filling the first trench and the second trench with a dielectric, top surfaces of the dielectric in the first trench and the dielectric in the second trench having a same vertical position; bonding a second substrate on the top surface of the first substrate; thinning the second substrate to a first thickness; and forming regions of the second substrate corresponding to the photonic device region and the electronic device region to have a second thickness and a third thickness, respectively, wherein the second thickness is greater than the third thickness.