发明名称 |
Integrated chemical sensor |
摘要 |
A integrated circuit die includes a chemical sensor, a thermal sensor, and a humidity sensor formed therein. The chemical sensor, thermal sensor, and humidity sensor include electrodes formed in a passivation layer of the integrated circuit die. The integrated circuit die further includes transistors formed in a monocrystaline semiconductor layer. |
申请公布号 |
US8860152(B2) |
申请公布日期 |
2014.10.14 |
申请号 |
US201113285911 |
申请日期 |
2011.10.31 |
申请人 |
STMicroelectronics Pte Ltd. |
发明人 |
Cherian Suman;Le Neel Olivier |
分类号 |
H01L31/058;G01N33/487 |
主分类号 |
H01L31/058 |
代理机构 |
Seed IP Law Group PLLC |
代理人 |
Seed IP Law Group PLLC |
主权项 |
1. A integrated circuit die comprising:
a semiconductor substrate; a plurality of transistors formed in the semiconductor substrate; a dielectric layer on the semiconductor substrate; metal interconnections in the dielectric layer; a first passivation layer on the dielectric layer; a first electrode on the first passivation layer; a second passivation layer over the first electrode and the first passivation layer; a first opening in the second passivation layer exposing a portion of the first electrode; a chemical reactant coating on the exposed portion of the first electrode, the reactant configured to react with a selected chemical in an environment surrounding the integrated circuit die, the reactant and the first electrode configured to generate an analog signal indicative of a concentration of the selected chemical in the environment surrounding the integrated circuit die; and a second electrode formed on the first passivation layer, a portion of the second electrode being coated in the chemical reactant and exposed to the surrounding environment by the first opening, wherein the analog signal is a current flowing between the first and the second electrode through the chemical reactant. |
地址 |
Singapore SG |