The invention belongs to the technical field of
electronic materials and components, and particularly relates to a thick film pyroelectric sensitive element and a preparation method thereof. The thick film pyroelectric
infrared sensitive element comprises a top
electrode, a
heat sensitive layer and a bottom
electrode. The top
electrode is used as a common electrode, and the thickness of the
infrared radiation absorbing surface of the top electrode is 10-500 nm. The
heat sensitive layer is arranged between the top electrode and the bottom electrode and is prepared by compounding pyroelectric
ceramic powder and organic pyroelectric polymers, and the thickness of the
heat sensitive layer is 1-100 um. The bottom electrode is used for leading out pyroelectric response signals, and the thickness of the bottom electrode is 10 nm to 1 um. According to different types of pyroelectric
infrared sensitive element, the top electrode and the bottom electrode of the infrared sensitive element are imaged. The thick film pyroelectric sensitive element is applied to safety burglary prevention,
human body detection and the like in the civilian field. The thick film pyroelectric sensitive element has the advantages of being good in
thermal insulation effect, more sensitive to weak environment temperature change, higher in sensitivity, simple in
manufacturing technology, low in cost, capable of facilitating
batch processing and beneficial to industrialization production.