Transponder and method for the production thereof

• US 5,148,404 A
• Filed: 10/09/1991
• Issued: 09/15/1992
• Est. Priority Date: 10/09/1990
• Status: Expired due to Term

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Tip, Anne A., Hilferink, Henk, Velten, Henk
• Primary Examiner(s): Pihulic, Daniel T.
• Application Number:
  US07/773,837
• Time in Patent Office: 342 Days
• Field of Search: 367/2, 342/51, 501/68
• US Class Current: 367/2
• CPC Class Codes: A01K 11/006 Automatic identification systems for animals, e.g. electronic devices, transponders for animals identification systems for access to feeding pens A01K1/0209; ear tags with electronic identification means A01K11/004
• CPC Class Codes: G06K 19/04 characterised by the shape
• CPC Class Codes: G06K 19/047 the record carrier being shaped as a coin or a gambling token
• 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

The invention relates to a transponder comprising a closed glass casing in which electrical components are placed, wherein the glass incorporates iron oxide, a method for the production of such a transponder, the use of iron oxide in the glass of a closed glass casing of a transponder and a method for the identification of animals with the use of such a transponder.

Claims

1. Transponder comprising a closed glass casing in which electrical components are placed, characterised in that the glass incorporates iron oxide.

2. Transponder according to claim 1 characterised in that the iron oxide comprises Fe₂ O₃.

3. Transponder according to one of the preceding claims, characterised in that the glass comprises between 1 and 5% by weight iron oxide.

4. Transponder according to claim 3, characterised in that the glass furthermore comprises about 70% by weight SiO₂, 1-2% by weight B₂ O₃, 0-5% by weight Al₂ O₃, 0-15% by weight Na₂ O₃, 0-5% by weight K₂ O₃, 0-5% by weight CaO and 0-3% by weight BaO.

5. A transponder according to claim 1 characterized in that the glass comprises crystalline glass.

10. The transponder of claim 1, wherein said transponder is used to identify animals.

11. The transponder of claim 1, wherein said closed glass casing of said transponder is green.

6. A method for the production of a transponder comprising the steps of providing a tubular glass casing, introducing therein said electrical component, heat sealing of at least one end of said glass.

7. The method according to claim 6, characterized in that the heat sealing comprises infrared welding.

8. The method according to claim 6, characterized in that the heat sealing comprises high frequency welding.

12. The method of claim 6 and further comprising the step of using said transponder to identify animals.

9. Use of iron oxide in the glass of a closed glass casing of a transponder.