High temperature tag

• US 8,328,107 B2
• Filed: 01/14/2011
• Issued: 12/11/2012
• Est. Priority Date: 01/15/2010
• Status: Active Grant

• Current Assignee: Assa Abloy AB
• Original Assignee: Assa Abloy AB
• Inventors: Meilland, Andre, Suligoj, Eric
• Primary Examiner(s): Haupt, Kristy A
• Application Number:
  US13/007,402
• Publication Number:
  US 20110226856A1
• Time in Patent Office: 697 Days
• Field of Search: 235/488, 235/492
• US Class Current: 235/492
• CPC Class Codes: G06K 19/041 Constructional details G06K19/06 takes precedence
• CPC Class Codes: G06K 19/047 the record carrier being shaped as a coin or a gambling token
• CPC Class Codes: G06K 19/07724 the record carrier being at least partially made by a molding process molding in general B29C45/14
• CPC Class Codes: G06K 19/07728 the record carrier comprising means for protection against impact or bending, e.g. protective shells or stress-absorbing layers around the integrated circuit
• CPC Class Codes: G06K 19/0773 the record carrier comprising means to protect itself against external heat sources
• CPC Class Codes: G06K 19/07749 the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card

Abstract

In the high temperature tag of the disclosure, a transponder is placed between at least two thin layers of compressible high temperature material, preferably a high temperature textile. This resulting sandwich is then placed in the closed chamber formed by a two-part-housing of high temperature plastic. Finally, a cover, also of high temperature plastic, is injection-molded over the joining parts of the housing, in order to seal it hermetically.

Claims

1. A high temperature RFID tag, comprising:

a transponder;

at least two layers of compressible high temperature material, one of each said layers being positioned on each side of said transponder;

a housing base and a housing top, both made of high temperature plastic, which are joined together to form a closed chamber comprising compression means;

said transponder and said at least two layers being positioned in said closed chamber such that said layers are at least punctually slightly compressed by said compression means, thereby maintaining said transponder in a secure floating position between said at least two layers; and

an overmolded cover, made of injected high temperature plastic, sealing hermetically the housing base and the housing top together by covering at least the external portions where the base and the top are joined together.

2. A high temperature RFID tag according to claim 1 wherein the layers of compressible high temperature material comprise a high temperature textile.

3. A high temperature RFID tag according to claim 1 wherein each of the housing base, housing top and overmolded cover are made of high temperature plastic materials including one or more of PPS, PPA , PEEK and PTFE.

4. A high temperature RFID tag according to claim 1 wherein said compression means are formed by an internal profile of said closed chamber comprising elevations which are dimensioned and positioned in such a way that they punctually compress said layers, without exerting a direct mechanical pressure on the transponder.

5. A high temperature RFID tag according to claim 4, wherein the compression means are formed in the inner side of the housing base and housing top.

6. A high temperature RFID tag according to claim 4 wherein the antenna shows at least two terminal pads whose top surface is made of gold, wherein the RFID integrated circuit shows at least two connections pads whose top surface is made of gold, and wherein each terminal pad is connected to a connection pad by means of a gold wire.

7. A high temperature RFID tag according to claim 1 wherein the transponder comprises a high temperature PCB on which an antenna and a RFID integrated circuit are fixed and bonded together.

8. A high temperature RFID tag according to claim 1, wherein none of the components of the tag comprise silicon.