# US 10,770,647 B2 · Electroacoustic conversion film web, electroacoustic conversion film, and method of manufacturing an electroacoustic conversion film web

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- Number: US 10,770,647 B2
- Document ID: US10770647B2
- Status: Granted
- Kind: B2
- Application number: 16/254,192
- Filed: 2019-01-22
- Published: 2019-05-23
- Granted: 2020-09-08
- Earliest claimed: 2015-05-11
- Assignees: FUJIFILM Corporation
- Applicants: FUJIFILM Corporation
- Inventors: Akihito Fukunaga; Tetsu Miyoshi
- Web page: https://patentgrep.com/patent/US10770647B2

## CPC

- H10N 30/072: by laminating or bonding of piezoelectric or electrostrictive bodies
- B32B 3/04: characterised by {at least one} layer folded at the edge, e.g. over another layer {; characterised by at least one layer enveloping or enclosing a material}
- B32B 3/30: characterised by a layer formed with recesses or projections, e.g. {hollows, grooves, protuberances, ribs (apertured layer B32B3/266; layer with cavities or internal voids B32B3/26)}
- B32B 5/022: {Non-woven fabric}
- B32B 5/18: characterised by features of a layer {of} foamed material
- B32B 5/245: {another layer next to it being a foam layer}
- B32B 5/26: another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)}
- B32B 5/32: {at least two} layers being foamed {and next to each other}
- B32B 7/02: Physical, chemical or physicochemical properties
- B32B 7/06: permitting easy separation
- B32B 7/08: by mechanical means
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 23/04: comprising such {cellulosic plastic} substance as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a glass layer B32B17/08)}
- B32B 23/048: {of foam}
- B32B 23/08: of synthetic resin
- B32B 23/10: next to a fibrous or filamentary layer
- B32B 25/08: of synthetic resin
- B32B 25/12: comprising natural rubber
- B32B 25/14: comprising {synthetic rubber copolymers (B32B25/18 and B32B25/20 take precedence)}
- B32B 27/065: {of foam}
- B32B 27/08: of synthetic resin
- B32B 27/10: of paper or cardboard
- B32B 27/12: next to a fibrous or filamentary layer
- B32B 27/281: {comprising polyimides}
- B32B 27/285: {comprising polyethers}
- B32B 27/286: {comprising polysulphones; polysulfides}
- B32B 27/30: comprising vinyl {(co)polymers; comprising acrylic (co)polymers}
- B32B 27/302: {comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers}
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/325: {comprising polycycloolefins}
- B32B 27/36: comprising polyesters
- B32B 27/365: {comprising polycarbonates}
- B32B 29/005: {next to another layer of paper or cardboard layer}
- B32B 29/007: {next to a foam layer}
- B32B 29/02: next to a fibrous or filamentary layer
- B32B 37/12: characterised by using adhesives
- B32B 37/14: characterised by the properties of the layers
- B32B 38/0004: {Cutting, tearing or severing, e.g. bursting; Cutter details (cutting in general B26D; laminating combined with punching or perforating B32B38/04; removing all or part of the layers B32B38/10; cutting in combination with laying up and registration B32B38/185 takes precedence)}
- H04R 17/00: Piezoelectric transducers; Electrostrictive transducers (piezoelectric or electrostrictive elements in general H10N30/00; details of piezoelectric or electrostrictive motors, generators or positioners {H10N30/00})
- H04R 31/00: Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor {(manufacture of microstructural arrangements of deformable or non-deformable structures in general B81C1/00182)}
- H10N 30/045: by polarising
- H10N 30/06: Forming electrodes or interconnections, e.g. leads or terminals
- H10N 30/077: by liquid phase deposition
- H10N 30/081: by coating or depositing using masks, e.g. lift-off
- H10N 30/088: by cutting or dicing
- H10N 30/092: Forming composite materials
- H10N 30/20: with electrical input and mechanical output, e.g. functioning as actuators or vibrators
- H10N 30/2047: {Membrane type}
- H10N 30/30: with mechanical input and electrical output, e.g. functioning as generators or sensors
- H10N 30/308: {Membrane type}
- H10N 30/852: {Composite materials, e.g. having 1-3 or 2-2 type connectivity}
- H10N 30/87: Electrodes or interconnections, e.g. leads or terminals
- H10N 30/883: {Additional insulation means preventing electrical, physical or chemical damage, e.g. protective coatings}
- B32B 2255/00: Coating on the layer surface
- B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer
- B32B 2255/20: Inorganic coating
- B32B 2255/205: Metallic coating
- B32B 2255/24: Organic non-macromolecular coating
- B32B 2255/26: Polymeric coating
- B32B 2262/0284: Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
- B32B 2262/04: Cellulosic plastic fibres, e.g. rayon
- B32B 2262/10: Inorganic fibres
- B32B 2262/106: Carbon fibres, e.g. graphite fibres
- B32B 2266/02: Organic
- B32B 2266/0264: Polyester
- B32B 2266/0278: Polyurethane
- B32B 2305/72: Cured, e.g. vulcanised, cross-linked
- B32B 2307/10: having particular acoustical properties
- B32B 2307/204: Di-electric
- B32B 2307/50: having particular mechanical properties
- B32B 2307/51: Elastic
- B32B 2307/54: Yield strength; Tensile strength
- B32B 2307/546: Flexural strength; Flexion stiffness
- B32B 2307/718: Weight, e.g. weight per square meter
- B32B 2307/732: Dimensional properties
- B32B 2307/748: Releasability
- B32B 2309/105: Thickness
- B32B 2429/00: Carriers for sound or information
- B32B 2457/202: LCD, i.e. liquid crystal displays
- B32B 2457/206: Organic displays, e.g. OLED
- H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)

## Abstract

Provided are an electroacoustic conversion film web, an electroacoustic conversion film, and a method of manufacturing an electroacoustic conversion film web in which costs can be reduced by reducing the number of operations without damage to thin film electrodes, the points of electrode lead-out portions can be freely determined, and thus high productivity can be achieved. A preparation step of preparing an electrode laminated body in which a single thin film electrode and a single protective layer are laminated and a lamination step of laminating the electrode laminated body and an piezoelectric layer are included. A non-adhered portion that is not adhered to the piezoelectric layer is provided in at least one end portion of the thin film electrode in a case where the electrode laminated body and the piezoelectric layer are laminated in the lamination step.

## Claims

### Claim 1

An electroacoustic conversion film comprising:
a piezoelectric layer having dielectric properties;
two thin film electrodes respectively formed on both surfaces of the piezoelectric layer;
two protective layers respectively formed on the two thin film electrodes;
regions in which the piezoelectric layer, the two thin film electrodes, and the two protective layers have the same shape when viewed in a direction perpendicular to a principal surface of the piezoelectric layer and are adhered; and
regions in which the piezoelectric layer, the two thin film electrodes, and the two protective layers overlap when viewed in the direction perpendicular to the principal surface of the piezoelectric layer and the piezoelectric layer and the two thin film electrodes are not adhered.