公开(公告)号：SG54473A1

公开(公告)日：1998-11-16

申请号：SG1997000626

申请日：1997-03-01

Applicant: IBM

Inventor： BRADY MICHAEL JOHN ,  FAVREAU NORMAND GILLES ,  GUINDON FRANCOIS ,  MOSKOWITZ PAUL ANDREW ,  MURPHY PHILIP

IPC: H01Q1/40 ,  G06K19/077 ,  H01L23/29 ,  H01L23/31 ,  H01L23/495 ,  H01Q1/24 ,  H04B1/59

Abstract: A novel radio frequency transponder (tag) with a minimum of components and connects is thin and flexible because these components and connects can be unsupported by a substrate layer. This is accomplished by using a conducting leadframe structure not only as a connection medium but also as a circuit element, i.e., the transponder antenna. In various preferred embodiments, the leadframe is mechanically positioned and fixably attached to a circuit chip so that the leadframe (antenna) is self supporting. A protective coating can be added where the leadframe is attached to the circuit chip. Further a protective surrounding can envelops the entire leadframe antenna, circuit chip, and, if provided, the protective coating.