Methods for manufacturing well structures for low-noise chemical sensors
First Claim
Patent Images
1. A chemical detection device, comprising:
- a plurality of chemical sensors each having respective sensing surfaces;
a dielectric material having openings extending to the sensing surfaces, the openings having sidewalls, the dielectric material having a top surface extending between adjacent openings; and
a plurality of sidewall spacers on the sidewalls of the openings and not on the top surface of the dielectric material, the sidewall spacers having a bottom most surface spaced away from the sensing surfaces such that the sidewall spacer does not contact the surfaces, the sidewall spacers each having an inside surface defining a reaction region for receiving at least one reactant.
1 Assignment
0 Petitions
Accused Products
Abstract
In one implementation, a method for manufacturing a chemical detection device is described. The method includes forming a chemical sensor having a sensing surface. A dielectric material is deposited on the sensing surface. A first etch process is performed to partially etch the dielectric material to define an opening over the sensing surface and leave remaining dielectric material on the sensing surface. An etch protect material is formed on a sidewall of the opening. A second etch process is then performed to selectively etch the remaining dielectric material using the etch protect material as an etch mask, thereby exposing the sensing surface.
622 Citations
6 Claims
-
1. A chemical detection device, comprising:
-
a plurality of chemical sensors each having respective sensing surfaces; a dielectric material having openings extending to the sensing surfaces, the openings having sidewalls, the dielectric material having a top surface extending between adjacent openings; and a plurality of sidewall spacers on the sidewalls of the openings and not on the top surface of the dielectric material, the sidewall spacers having a bottom most surface spaced away from the sensing surfaces such that the sidewall spacer does not contact the surfaces, the sidewall spacers each having an inside surface defining a reaction region for receiving at least one reactant. - View Dependent Claims (2, 3, 4, 5, 6)
-
Specification