Hydrogen sensor having vertical nanogap structure and method for manufacturing the same

A method for manufacturing a hydrogen sensor, comprising:

• a first sacrificial layer formation step of forming a first sacrificial layer on a substrate having an electrode to a predetermined thickness, a support portion formation step of forming a support portion having insulating properties on the outside of the first sacrificial layer, spaced a predetermined distance apart from the first sacrificial layer after the first sacrificial layer formation step, a second sacrificial layer formation step of forming a second sacrificial layer having a spacer disposed between the first sacrificial layer and the support portion and a side protrusion protruding from a side of the spacer to a predetermined length and disposed at part of an upper surface of the first sacrificial layer after the support portion formation step, a sensor portion formation step of forming a sensor portion supported on the support portion with an end contacting the first sacrificial layer through deposition of a metal that expands in reaction with hydrogen after the second sacrificial layer formation step, and a nanogap formation step of forming a nanogap by removing the first sacrificial layer and the second sacrificial layer after the sensor portion formation step, wherein a thickness of the nanogap formed by the separation of the substrate and the sensor portion is adjusted by adjusting a thickness of the first sacrificial layer.

A method for manufacturing a hydrogen sensor, comprising:

• a first sacrificial layer formation step of forming a first sacrificial layer on a substrate having an electrode to a predetermined thickness, a support portion formation step of forming a support portion having insulating properties on the outside of the first sacrificial layer, spaced a predetermined distance apart from the first sacrificial layer after the first sacrificial layer formation step, a protrusion formation step of forming a protrusion on the first sacrificial layer to a predetermined thickness through deposition of a metal that expands in reaction with hydrogen after the support portion formation step, a second sacrificial layer formation step of forming a second sacrificial layer having a spacer disposed between the first sacrificial layer and the support portion and a side protrusion protruding from a side of the spacer to a predetermined length with a lower surface contacting an upper surface of the first sacrificial layer and a side contacting a side of the protrusion after the protrusion formation step, a seating portion formation step of forming a seating portion supported on the support portion and contacting the protrusion at a central area of a lower surface through deposition of a metal that expands in reaction with hydrogen after the second sacrificial layer formation step, and a nanogap formation step of forming a nanogap by removing the first sacrificial layer and the second sacrificial layer after the seating portion formation step, wherein a thickness of the nanogap formed by the separation of the substrate and the sensor portion is adjusted by adjusting a thickness of the first sacrificial layer.