Patent ID: 6038925
Filing Date: 2000-03-21
Classification: B06B,G01N,G10K,H02K

Abstract:
A focusing electromagnetic acoustic transducer comprising:a first insulation sheet;a first meander coil formed on a first surface of said first insulation sheet,a second meander coil formed on a second surface of said first insulation sheet, said first and second meander coils positioned so as to be coincident with each other, each of said meander coils comprising a plurality of coil segments wherein intervals between adjacent coil segments vary sequentially from one end to another end of said meander coils;a second insulation sheet attached to said first meander coil so as to sandwich the first meander coil between said first and second insulation sheets,a third insulation sheet attached to said second meander coil so as to sandwich the second meander coil between said first and third insulation sheets; anda magnet having opposite surfaces exhibiting opposite magnetic poles, one of said opposite surfaces being, positioned above said second insulation sheet.