Patent ID: 8846129
Filing Date: 2014-09-30
Classification: G01N

Abstract:
1. A method of forming a plurality of biological sensing structures, the method comprising: recessing a portion of a substrate to form a plurality of mesas in the substrate, wherein each of the plurality of mesas has a top surface and a sidewall surface adjacent to the top surface; depositing a first light reflecting layer over the substrate thereby covering the top surface and the sidewall surface of each mesa; forming a filling material over a first portion of the first light reflecting layer to expose a second portion of the first light reflecting layer; depositing a stop layer over the filling material and the second portion of the first light reflecting layer; forming a sacrificial layer over the stop layer; planarizing the sacrificial layer to partially expose the stop layer; forming a first opening in the stop layer and the first light reflecting layer to expose a first portion of the top surface of each mesa; depositing a second light reflecting layer over the first opening and the partially exposed top surface of each mesa; and forming a second opening in the second light reflecting layer to expose a second portion of the top surface of each mesa.