CAPACITIVE PROBE FABRICATING FROM SPRAY DEPOSITION

摘要

A proximity sensor includes a lead supported on an outer surface of a case structure and a sensor wire that extends from the lead and through an opening in the case structure. The sensor is formed by applying alternating layers of electrically conductive and non-conductive materials in a non-cured state. A base non-conductive layer is applied to an inner surface of the case structure around the sensor wire in a non-cured state. Once cured, a conductive layer is deposited onto the base non-conductive layer and encapsulates the sensor wire. A cover non-conductive layer is then deposited over portions of the conductive layer to insulate the conductive layer. Portions of the non-conductive layer are then removed such that an area of the conductive layer is exposed to define a sensor area.

主权项

1. A method of fabricating a proximity sensor comprising:
extending a sensor wire through an opening in a substrate; depositing a base electrically non-conductive layer with a cure in place process onto the substrate and around the sensor wire; and encapsulating the sensor wire within an electrically conductive layer deposited onto the base non-conductive layer with a cure in-place process.