INFRARED DETECTOR AND MANUFACTURING METHOD THEREOF

PROBLEM TO BE SOLVED: To provide an infrared detector and a manufacturing method thereof, with which it is possible to respond to a plurality of kinds differing in threshold.SOLUTION: A conversion circuit 4 of an IC element 3 converts a current signal inputted from a pyroelectric element 2 through a...

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Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide an infrared detector and a manufacturing method thereof, with which it is possible to respond to a plurality of kinds differing in threshold.SOLUTION: A conversion circuit 4 of an IC element 3 converts a current signal inputted from a pyroelectric element 2 through an input pad electrode 32 into a voltage signal. A determination circuit 5 makes determination on the basis of the voltage signal outputted from the conversion circuit 4. An output circuit 6 outputs the determination result of the determination circuit 5 as a detection signal through an output pad electrode 36. The IC element 3 further includes threshold setting pad electrodes 37, 38, and a threshold setting circuit 7 for setting a threshold used in the determination circuit 5 on the basis of the potentials of the threshold setting pad electrodes 37, 38. A mounting substrate 9 further includes a threshold setting terminal 107 for determining the potentials of the threshold setting pad electrodes 37, 38. The threshold of an infrared detector 1 varies depending on whether or not the threshold setting pad electrodes 37, 38 and the threshold setting terminal 107 are connected to each other by conductive members (wires 117, 118).SELECTED DRAWING: Figure 3 【課題】閾値の異なる複数種の品種に対応することが可能な赤外線検出装置及びその製造方法を提供する。【解決手段】IC素子3の変換回路4は、焦電素子2から入力パッド電極32を通じて入力される電流信号を電圧信号に変換する。判定回路5は、変換回路4から出力される電圧信号に基づいて判定を行う。出力回路6は、判定回路5の判定結果を、出力パッド電極36を通じて検出信号として出力する。IC素子3は、閾値設定用パッド電極37、38と、閾値設定用パッド電極37、38の電位に基づいて判定回路5で用いる閾値を設定する閾値設定回路7と、を更に有する。実装基板9は、閾値設定用パッド電極37、38の電位を決めるための閾値設定用端子107を更に有する。赤外線検出装置1は、閾値設定用パッド電極37、38と閾値設定用端子107との間が導電部材(ワイヤ117、118)にて接続されているか否かによって閾値が変わる。【選択図】図3