A manufacturing method of a field emission ion neutralizer chip based on an SOI process

Abstract

The invention discloses a manufacturing method of a field emission ion neutralizer chip based on an SOI process. The manufacturing method comprises the following steps: (1) preparing an SOI substratewith a polished surface; (2) removing the top silicon and the silicon dioxide insulating layer in the target area by using photoetching and etching processes, and exposing the bottom silicon; (3) obtaining an array type photoresist pattern on the underlying silicon, and depositing a buffer layer and a catalyst layer to form a buffer layer-catalyst layer array; (4) forming a carbon nanotube array to obtain a cathode part; (5) preparing an array type through hole structure by using a silicon wafer as a grid substrate; (6) depositing a metal film on the through hole structure to obtain an anode part; and (7) bonding the cathode part and the anode part to obtain the field emission ion neutralizer chip. By improving the design and the like of the whole flow process of the preparation method, the obtained device can effectively overcome the field shielding effect and the heat effect, and has the advantages of being good in emission efficiency, low in power consumption and long in service life.

Description

technical field [0001] The invention belongs to the technical field of aerospace vehicle electric propulsion, and more specifically relates to a manufacturing method of a field emission ion neutralizer chip based on an SOI process. Background technique [0002] The development of the aerospace field is inseparable from breakthroughs in propulsion technology. At present, a series of aerospace exploration experiments proposed by the state have put forward higher requirements for electric propulsion technology. Electric propulsion has become an important means to improve the overall performance and technical level of spacecraft. For the currently widely used micro-satellites, a micro-electric propulsion system with high-precision micro-new level thrust is needed to realize satellite orbit positioning and attitude control. The micro electric propulsion system can be divided into the following three parts like the traditional electric propulsion system: high-voltage ionization sy...

AI Technical Summary

Problems solved by technology

However, there are several key technical issues of the field emission neutralizer that are still unresolved: first, the field shielding effect - because of its inhomogeneity, only a part of the nanomaterial can effectively emit under a strong electric field, while due to the local current density If it is too large, it is easy to be damaged, which will affect its stability and life; second, the thermal effect-now the more commonly used cathode substrate is a silicon substrate with poor thermal conductivity, and nanomaterials have high contact resistance and resistivity during continuous operation. , resulting in continuous heat buildup that damages the emitter structure

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