Ceramic has been widely applied for its stable electrical properties

mechanical robustness and chemically inert.In order to realize the stress test in high temperature

high pressure

humidity and other harsh environment

with a kind of ceramics and high temperature resistant conductive paste for matrix

use LTCC technology and non-contact wireless transmission design method to realize sensor preparation.LC resonant circuit is used as basic working principle of sensor

by screen printing technology to achieve placement of passive devices such as inductance

capacitance

conduction band

and fill carbon film（printed carbon paste）in the cavity which effectively prevents the pyramid in the cavity collapses.The sensor avoids device packaging

wire connecting outside and lay a foundation for sensor working in high temperature

high pressure

humidity and other harsh environments.