Accession Number : ADD010445

Title :   Method and Apparatus for Dispersive Signal Processing.

Descriptive Note : Patent application,


Personal Author(s) : Ballato,Arthur ; Mariani,Elio A

Report Date : 27 Jul 1983

Pagination or Media Count : 15

Abstract : The invention is an improved manufacturing technique for producing a certain class of Surface Acoustic Wave (SAW) devices, namely those having input and output transducers in close proximity. A much higher manufacturing yield results from eliminating the cutting of a slot in the substrate between input and output transducers as formerly done. This frequently destructive step is replaced by ion-milling of a deep groove between the ports and backfilling with a metal of proper configuration to provide electromagnetic shielding. The technique produces a new device that is at least equal to the prior art in rejection of unwanted couplings between input and output. (Author)

Descriptors :   *Patent applications, *Surface acoustic waves, *Transducers, Input output devices, Processing equipment, Manufacturing, Substrates, Electromagnetic shielding, Inventions

Subject Categories : Line, Surface and Bulk Acoustic Wave Devices
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE