Patent ID: 8110117
Filing Date: 2012-02-07
Classification: B41J

Abstract:
1. A method of forming a fluid chamber and source and drain regions of a transistor in a substrate, the forming comprising: forming a recess in a first surface of the substrate prior to forming the source and drain regions of the transistor in the first surface of the substrate, the recess having a width, depth, and height selected to correspond to a width, depth, and height of the fluid chamber; forming a sacrificial material in the recess; forming the source and drain regions of the transistor in the substrate; forming a nozzle structure overlying the sacrificial material having a nozzle opening that exposes the sacrificial material; forming a path from a second surface of the substrate to expose the sacrificial material; and removing the sacrificial material from the recess to expose the chamber with the selected width, depth, and height, the chamber in fluid communication with the path, the nozzle opening, and a surrounding environment.