Methods for manufacturing well structures for low-noise chemical sensors
First Claim
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1. A method for manufacturing a chemical detection device, the method comprising:
- forming a chemical sensor having a sensing surface;
depositing a dielectric material on the sensing surface;
performing a first etch process to partially etch the dielectric material to define an opening over the sensing surface and leave remaining dielectric material on the sensing surface;
forming an etch protect material on a sidewall of the opening; and
performing a second etch process to selective etching the remaining dielectric material using the etch protect material as an etch mask, thereby exposing the sensing surface.
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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.
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Citations
11 Claims
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1. A method for manufacturing a chemical detection device, the method comprising:
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forming a chemical sensor having a sensing surface; depositing a dielectric material on the sensing surface; performing a first etch process to partially etch the dielectric material to define an opening over the sensing surface and leave remaining dielectric material on the sensing surface; forming an etch protect material on a sidewall of the opening; and performing a second etch process to selective etching the remaining dielectric material using the etch protect material as an etch mask, thereby exposing the sensing surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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