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Surface-modified glass, electronic component, and method for forming silicate film

A technology for electronic components and surface modification, applied in resistor components, chemical instruments and methods, alkali metal silicate coatings, etc., can solve problems such as water resistance reduction, and achieve the effect of inhibiting dissolution

Active Publication Date: 2021-12-24
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Patent Document 1 describes that in waterproof glass having a silicone-based resin film on the surface of a glass substrate, the silicone-based resin is hydrolyzed by alkaline components eluted from the glass substrate, resulting in a decrease in water resistance.

Method used

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  • Surface-modified glass, electronic component, and method for forming silicate film
  • Surface-modified glass, electronic component, and method for forming silicate film
  • Surface-modified glass, electronic component, and method for forming silicate film

Examples

Experimental program
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Effect test

Embodiment 1

[0108] A coating agent containing a lithium silicate solution: 25% by weight and water: the remainder was prepared. A glass substrate of about 1 cm square made of borosilicate glass was prepared, and immersed in the above-mentioned coating agent for 1 minute at room temperature. Then, the glass substrate was washed with water and dried to prepare a sample of Example 1.

Embodiment 2

[0116] by BaTiO 3 Sintered electrodes containing copper and borosilicate glass are formed as external electrodes for the ceramic unit body as the base material, and a laminated ceramic capacitor is produced. The obtained multilayer ceramic capacitor was immersed in the coating agent used in Example 1 at normal temperature for 1 minute. Then, the multilayer ceramic capacitor was washed with water and dried to prepare a sample of Example 2.

[0117] The external electrodes formed in the samples of Example 2 were observed by TEM in the following manner.

[0118] A cross-sectional sample of the surface of the external electrode was taken out by focused ion beam (FIB) processing, and TEM observation was performed with a TEM (manufactured by JEOL Corporation, JEM-2200FS). In order to avoid damage to the sample during FIB processing, Pt sputtering and carbon deposition were performed on the surface of the external electrodes before FIB processing.

[0119] Figure 7 It is a TEM i...

Embodiment 3

[0126] A coating agent containing lithium silicate as an alkali metal silicate: 6% by weight and water as an inorganic solvent: 94% by weight was prepared. The viscosity, surface tension and pH of the coating agent were measured. The viscosity of the coating agent was measured using a viscometer (manufactured by A&D, SV-10). The surface tension of the coating agent was measured using a drop count meter (manufactured by KOKU RIKEN GLASS CORPORATION, in accordance with JIS K-3362). The pH of the coating agent was measured using a pH meter (manufactured by Horiba, using 6367-10D as a pH electrode).

[0127] A 10 mm square glass substrate was prepared, and it was dipped in the above-mentioned coating agent at 25° C. for 1 minute. Then, the glass substrate was washed with water and dried at 65° C. for 1 hour to prepare a sample of Example 3.

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Abstract

The surface-modified glass 1 is equipped with a glass 2 and a silicate film 3 provided on the surface of the glass 2. The glass 2 contains at least one polyvalent metal ion, and the silicate film 3 contains a polyvalent metal ion in common with the glass 2.

Description

technical field [0001] The present invention relates to a method for forming a surface-modified glass, an electronic component, and a silicate film. Background technique [0002] It is known that when moisture adheres to the surface of glass, glass components such as metal ions are eluted. For example, Patent Document 1 discloses that in waterproof glass having a silicone-based resin film on the surface of a glass substrate, the silicone-based resin is hydrolyzed by alkaline components eluted from the glass substrate, resulting in reduced water repellency. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Application Laid-Open No. 6-330028 Contents of the invention [0006] [Problem to be solved by the invention] [0007] The above-mentioned elution of glass components also becomes a problem in electronic components such as laminated ceramic capacitors. Glass may exist on the surface of a ceramic unit body constituting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/22H01C1/034C09K3/18H01G4/30H01F27/32C09D1/02
CPCC03C17/22C09D1/02C09K3/18H01F27/32H01G4/30C03C17/23C03C2217/228C03C2217/28C03C2218/111H01G4/232H01C1/034C03C3/04C03C4/18C03C2204/00H01G4/228
Inventor 大川纪行野村善行森智彦
Owner MURATA MFG CO LTD