PYROELECTRIC MATERIAL, RADIATION SENSOR, METHOD OF MAKING A RADIATION SENSOR, USE OF LITHIUM TANTALATE AND LITHIUM NiOBATE
AssigneeExcelitas Technologies Corp.
InventorsFred Plotz, Gerhard Knaup, Henrik Ernst
Life of this patent
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Abstract
A pyroelectric material is made of lithium tantalate treated to an extent that a bulk resistivity is in a range of less than 2e+14Ω*cm, preferably less than 5e+12Ω*cm, but more than a lower threshold is obtained.
Claims16
A pyroelectric material comprising lithium tantalate or lithium niobate treated to an extent that a bulk resistivity is in a range of less than 2e+14[Omega]*cm, preferably less than 5e+12[Omega]*cm.
A pyroelectric material comprising a mixture of LiTaO3 and LiTaOn, wherein n is 1 or 2 and designates the number of oxygen atoms per molecule on regular crystal grid positions, while remaining oxygen atoms may be removed completely or at least away from their regular crystal grid positions, and the mixing ratio being such that a bulk resistivity is in a range of less than 2e+14[Omega]*cm, preferably less than 5e+12[Omega]*cm.
A method of making a radiation sensor, said sensor comprising a sensor element on a substrate, the method comprising the steps of providing a substrate, forming a lithium tantalate sensing element of modified lithium tantalate material, placing the sensing element on the substrate, connecting the sensing element with wiring on the substrate, providing a housing, placing the sensor element in the housing, and connecting the wiring with terminals of the housing.
Use of modified lithium tantalate for pyroelectric radiation detection.
Use of lithium tantalate with a bulk resistivity of less than 2e+14[Omega]*cm, preferably less than 5e+12[Omega]*cm, and of preferably more than 2e+10[Omega]*cm, preferably more than 3e+ll[Omega]*cm for pyroelectric radiation detection.
Dependencies are inferred from the claim text.