Patent ID: 8119440
Filing Date: 2012-02-21
Classification: G02B,H01L,Y10S

Abstract:
1. A method of forming an optical structure for an imaging device comprising: providing a photo device arranged in a first layer, and forming an associated optical path for the photo device, said optical path being formed by: providing the first layer comprising a first material having a first refractive index; providing a second layer comprising a second material having a second refractive index; and providing a transition region comprising the first material and the second material, the transition region being provided between said first and second layers and having a refractive index which changes from a value at or about said first refractive index to a value at or about said second refractive index; wherein said transition region comprises a mixture of said first and second materials; wherein a ratio of said first material to said second material in said mixture increases in the direction of the optical path toward the second layer; and wherein the transition region comprises quantum dots of said second material of a size less than 0.2 um arranged within said first material.