发明名称 |
Thermal mass gas flow sensor and method of forming same |
摘要 |
A thermal gas flow sensor and method of forming such a sensor. The sensor has a substrate and a heater disposed on the substrate. At least one pair of thermal sensing elements is disposed on the substrate either side of the heater. A protective layer is disposed on at least the heater and/or the thermal sensing elements. The protective layer comprises a high temperature resistant polymer based layer which is preferably a fluoropolymer based layer. The protective layer can also cover interconnects and electrical connections also formed on the substrate so as to completely seal the sensor. A passivation layer, such as silicon nitride, can be disposed on the sensing and/or heating elements and optionally the interconnects and is arranged to interpose the protective layer and the substrate.
|
申请公布号 |
US2007209433(A1) |
申请公布日期 |
2007.09.13 |
申请号 |
US20060373947 |
申请日期 |
2006.03.10 |
申请人 |
HONEYWELL INTERNATIONAL INC. |
发明人 |
GEHMAN RICHARD W.;DMYTRIW ANTHONY M.;BLUMHOFF CHRISTOPHER M.;SHIFFER STEPHEN R. |
分类号 |
G01F1/68 |
主分类号 |
G01F1/68 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|