Method for manufacturing an infrared sensor device

Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive

Reexamination Certificate

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C257S227000

Reexamination Certificate

active

07045785

ABSTRACT:
A method for manufacturing an infrared sensor, including preparing a substrate including a supporting member made of single crystalline silicon, a first layer made of silicon oxide formed on the supporting member, and a second layer made of single crystalline silicon formed on the first layer, embedding a silicon oxide layer over the second layer, forming an infrared detection pixel in the second layer, the infrared detection pixel having a function of converting heat into an electric signal, fanning a supporting beam line including a U-shaped electric conductor on the silicon oxide layer, while forming a gate electrode of a MOS transistor of a peripheral circuit on the second layer, the gate electrode having an electric conductor with U-shaped cross section, forming an infrared absorption layer on the second layer, the infrared absorption layer having a function of converting an infrared ray into heat, and etching the second layer to form a hole for isolating the infrared detection pixel from of the substrate and suspending the infrared detection pixel within the hole by the supporting beam line.

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