SENSOR MODULE AND PROTECTIVE GLASS

• US 20200132521A1
• Filed: 12/26/2019
• Published: 04/30/2020
• Est. Priority Date: 07/05/2017
• Status: Active Grant

• Current Assignee: AGC, Inc.
• Original Assignee: AGC, Inc.
• Inventors: Akiba, Shusaku, Ozeki, Masao, Takeda, Satoshi, Kanasugi, Satoshi, Ogami, Satoshi
• Granted Patent: US 11,204,266 B2
• Time in Patent Office: Days
• CPC Class Codes: B32B 17/10137 Chemical strengthening
• CPC Class Codes: C03B 27/012 by heat treatment, e.g. for crystallisation; Heat treatment of glass products before tempering by cooling C03B27/008, C03B27/016 take precedence
• CPC Class Codes: C03C 10/00 Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• CPC Class Codes: C03C 17/28 with organic material C03C17/34, C03C17/44 take precedence
• CPC Class Codes: C03C 21/00 Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
• CPC Class Codes: G01D 11/245 Housings for sensors
• CPC Class Codes: G01D 11/26 Windows; Cover glasses; Sealings therefor
• CPC Class Codes: G01D 11/30 Supports specially adapted for an instrument; Supports specially adapted for a set of instruments

Abstract

A sensor module includes: a base member; at least one of a single or a plurality of sensors and vibrators arranged on the base member; and a protective member constituted of at least one flat surface or a curved surface, provided so as to cover the at least one of the sensors and the vibrators. A part or whole of the protective member is formed of a strengthened glass and the strengthened glass is a chemically strengthened glass or a physically strengthened glass.

Claims

1. A sensor module comprising:

a base member;

at least one of a single or a plurality of sensors and vibrators arranged on the base member; and

a protective member constituted of at least one flat surface or a curved surface, provided so as to cover the at least one of the sensors and the vibrators,

wherein a part or whole of the protective member is formed of a strengthened glass and

the strengthened glass is a chemically strengthened glass or a physically strengthened glass.

2. The sensor module according to claim 1, wherein the strengthened glass has a surface compressive stress value of 400 MPa or more and a depth of compressive stress layer of 10 μ

m or more.

3. The sensor module according to claim 2, wherein the strengthened glass has the surface compressive stress value of 600 MPa or more and the depth of compressive stress layer of 40 μ

m or more.

4. The sensor module according to claim 1, wherein the strengthened glass is a chemically strengthened glass and has a thickness of from 0.5 mm to 3.5 mm.

5. The sensor module according to claim 1, wherein the strengthened glass is a chemically strengthened glass, has a thickness of from 1.5 mm to 3.5 mm, and has a depth of compressive stress layer in a range of from 200 μ

m to 580 μ

m.

6. The sensor module according to claim 5, wherein the chemically strengthened glass has a surface compressive stress value of 700 MPa or more.

7. The sensor module according to claim 5, wherein the chemically strengthened glass has the depth of the compressive stress layer in a range of from 250 μ

m to 580 μ

m, and has a compressive stress value at a depth of 100 μ

m from a surface of 100 MPa or more.

8. The sensor module according to claim 5, wherein the chemically strengthened glass has a curved surface shape having a convex surface and a concave surface, and

a value obtained by subtracting a surface compressive stress value of the concave surface from a surface compressive stress value of the convex surface is 10 MPa or more.

9. The sensor module according to claim 8, wherein a value obtained by subtracting a depth of compressive stress layer of the concave surface from a depth of compressive stress layer of the convex surface is 10 μ

m or more.

10. The sensor module according to claim 1, wherein the chemically strengthened glass has at least one bending point in a region forming the compressive stress layer and has a stress distribution curve having a different inclination with the bending point as a boundary.

11. The sensor module according to claim 1, wherein the vibrator has an ultrasonic generating element.

12. The sensor module according to claim 1, wherein the protective member has a transparent heater.

13. The sensor module according to claim 1,

wherein the strengthened glass has a first main surface and a second main surface facing the first main surface, and has an end surface between the first main surface and the second main surface, and

the end surface has a surface roughness in a range of from 0.01 μ

m to 1.0 μ

m.

14. The sensor module according to claim 1, wherein the strengthened glass is a glass ceramics.

15. The sensor module according to claim 1, wherein the strengthened glass has a water-repellent film on the surface of the strengthened glass.

16. A protective glass constituted of a flat surface or a curved surface,

wherein a part or whole of the protective glass is a strengthened glass, and

the strengthened glass is a chemically strengthened glass or a physically strengthened glass.

17. The protective glass according to claim 16, having an ultrasonic vibrator.

18. The protective glass according to claim 16, having a transparent heater.