US 6,255,949 B1 · High temperature RFID tag

Abstract

A high temperature RFID tag is described which has a survival temperature in the range of approximately −40° C. to 300° C. and an operating temperature in the range of approximately −20° C. to 200° C. In one embodiment of the invention, the RFID tag comprises a housing comprising a substantially flexible first thermally resistant material and having a base and a top, and a circuit board substrate comprising a substantially flexible second thermally resistant material which is encapsulated within the housing. In an additional embodiment of the invention, the high temperature RFID tag comprises a substrate assembly, the substrate assembly including a substrate having an integrated circuit disposed thereon, the substrate comprising a substantially flexible first thermally resistant material, and a high temperature encapsulant disposed on a first side of the substrate, the substrate assembly having a survival temperature in the range of −40° C. to 300° C.

Claims18

Dependent claims

A RFID tag, comprising:

a housing and substrate assembly,
said housing having base and a top, said base and said top forming a chamber therein, said housing comprising a first thermally resistant material,
said substrate assembly including a substrate having an integrated circuit, said substrate comprising a second thermally resistant material,
said substrate assembly being disposed in said chamber,
said housing and substrate assembly jointly having a survival temperature range of approximately 220° C. to 300° C. and an operating temperature range of approximately −18° C. to 135° C.,
said housing and substrate assembly jointly being capable of exposure to cyclic changes in temperature to and between said operating temperature range and said survival temperature range without substantially affecting the intended functions of the tag.

3 more elements

Dependencies are inferred from the claim text.

High temperature RFID tag

Life of this patent

High temperature RFID tag

Life of this patent

Abstract

Claims18