Electronic device, and manufacturing method of electronic device

Patent metadata

Field	Value
Publication number	US-9744764-B2
Application number	US-201615065599-A
Country	US
Kind code	B2
Filing date	Mar 9, 2016
Priority date	Mar 20, 2015
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

An electronic device includes a first drive substrate (a pressure chamber substrate and a vibration plate) including a piezoelectric element formed thereon, and a second substrate (a sealing plate) bonded to the first drive substrate, a bonding resin forms an accommodating space that surrounds and accommodates a drive region of the piezoelectric element between the first substrate and the second substrate, and a reinforced resin that supports the first substrate and the second substrate in a position deviated from the drive region in the accommodating space.

First claim

What is claimed is:

1. An electronic device comprising:
a first substrate and a second substrate which are bonded through a bonding resin having photosensitivity, the first substrate including a drive element, that deforms a drive region, provided in the drive region for which flexural deformation is acceptable, and the second substrate being provided and spaced from the first substrate by interposing the drive element and a structure related to driving of the drive element therebetween,
wherein the bonding resin forms an accommodating space that surrounds and accommodates the drive region, between the first substrate and the second substrate,
wherein a supporting portion, that supports the first substrate and the second substrate, is formed at a position deviated from the drive region, in the accommodating space,
wherein the drive element comprises a first electrode, a piezoelectric layer disposed on top of the first electrode, and a second electrode disposed on top of the piezoelectric layer, the drive element having an electric field application region that is applied an electric field by the first electrode and the second electrode and a non-electric field application region that is not applied the electric field by the first electrode and the second electrode, and
wherein the second electrode extends to the non-electric field application region.

2. The electronic device according to claim 1 , wherein the supporting portion related to each of adjacent drive regions is arranged in a corresponding position, in the accommodating space thereof.

3. The electronic device according to claim 1 , wherein the supporting portion is formed by a resin of the same type as the bonding resin.

4. The electronic device according to claim 1 ,
wherein a bump electrode related to driving of the drive element is formed on any one substrate of the first substrate and the second substrate so as to protrude in the other substrate,
wherein the bump electrodes are respectively arranged on both sides in a direction perpendicular to an arrangement direction of the drive region, across a region in which the drive region is formed, and
wherein the accommodating space is formed between the bump electrodes on both sides.

5. A manufacturing method of an electronic device, the electronic device including a first substrate and a second substrate which are bonded through a bonding resin having photosensitivity, the first substrate including a drive element, that deforms a drive region, provided in the drive region for which flexural deformation is acceptable, and the second substrate being provided and spaced from the first substrate by interposing the drive element and a structure related to driving of the drive element therebetween, the manufacturing method comprising:
applying a resin having photosensitivity to the first substrate;
forming a bonding resin that forms an accommodating space which accommodates the drive region, by patterning the applied resin and surrounding a region in which the drive region is formed, and a supporting portion that supports the first substrate and the second substrate at a position deviated from the drive region, in the accommodating space; and
bonding the first substrate and the second substrate, in a state of interposing the bonding resin and the supporting portion between the first substrate and the second substrate.

6. The electric device according to claim 1 , wherein the structure related to driving of the drive element has a bump electrode, wherein the bump electrode contacts with the second electrode in the non-electric field application region.

7. An electronic device comprising:
a first substrate and a second substrate which are bonded through a bonding resin having photosensitivity, the first substrate including a drive element, that deforms a drive region, provided in the drive region for which flexural deformation is acceptable, and the second substrate being provided and spaced from the first substrate by interposing the drive element and a structure related to driving of the drive element therebetween,
wherein the bonding resin forms an accommodating space that surrounds and accommodates the drive region, between the first substrate and the second substrate,
wherein a supporting portion, that supports the first substrate and the second substrate, is formed at a position deviated from the drive region, in the accommodating space,
wherein the drive element comprises a first electrode, a piezoelectric layer disposed on top of the first electrode, and a second electrode disposed on top of the piezoelectric layer,
wherein the structure related to driving of the drive element has a bump electrode that includes an internal resin that is made of a resin having elasticity, and a conductive film which is partially formed on the surface of the internal resin, and
wherein the bump electrode contacts with the second electrode.

Assignees

• Seiko Epson Corp

Inventors

• Matsuo Yoshihide

Classifications

• B41J2/161

  of film type, deformed by bending and disposed on a diaphragm · CPC title

• B41J2/1623

  bonding and adhesion · CPC title

• B41J2/1631

  photolithography · CPC title

• B41J2002/14491

  Electrical connection · CPC title

• B41J2/14233 Primary

  of film type, deformed by bending and disposed on a diaphragm · CPC title