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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 4595853 B1

PDFFull Text
Date of Patent:
Jun. 17, 1986

Filed:

Nov. 17, 1983

Apparatus for and method of determining properties of saw substrates

Applicant:
Inventors:

Kazuyuki Nagatsuma, Hachioji, JP;

Yukio Ito, Sayama, JP;

Hirosi Takeuchi, Matsudo, JP;

Sakichi Ashida, Fuchu, JP;

Shigeru Jyomura, Tokyo, JP;

Assignee:

Hitachi, Ltd., Tokyo, JP;

Attorney:

Antonelli, Terry & Wands

Primary Examiner:

Charles Hart

Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
3103 / ; 324 56 ; 73618 ;
Abstract

An apparatus for and a method of non-destructively determining properties of a SAW substrate, in which first and second interdigital transducers are formed in a spaced relationship on a single common piezoelectric substrate, a blocking member is formed between said transducers on the substrate for preventing an acoustic wave signal from being transferred between said transducers via the common substrate, spacers are provided for supporting a to-be-determined SAW substrate above the common substrate with a spacing left between the SAW substrate and the fingers of transducers, the SAW substrate to be placed on the spacers is positioned with respect to the transducers so that co-directional mode coupling will, in operation, effectively take place between the SAW substrate and the transducers, adherence between the SAW substrate and the spacers is secured to enhance the co-directional mode coupling, an electric signal is applied to the first transducer for transferring, due to the co-directional mode coupling, an acoustic signal to the SAW substrate along the surface of which the acoustic signal will propagate and will be transferred, due to the co-directional mode coupling, to the second transducer, and the output of the second transducer is measured.

Find Patent Forward Citations

Nagatsuma, Kazuyuki. (1986). Apparatus for and method of determining properties of saw substrates (U.S. Patent No. 4595853). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4595853

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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