Patent ID: 9379302
Filing Date: 2016-06-28
CPC Classification: G01F,H01L,Y10T

Claim Text:
1. A method of manufacturing a thermal sensor that has a detection part having a heating resistor and a circuit part having a control circuit for controlling the heating resistor, the method comprising: (a) forming a first layered film including a plurality of insulating films above a semiconductor substrate; (b) forming the heating resistor on the first layered film; (c) forming the control circuit on the semiconductor substrate; (d) forming a second layered film including a plurality of insulating films on the heating resistor and above the control circuit; (e) forming an intermediate layer on the second layered film; (f) forming a third layered film including a plurality of insulating films on the intermediate layer; and (g) etching a portion in the third layered film located above the detection part using the intermediate layer as an etch stop layer.