# US 2017/0287639 A1 · Ceramic composition and multilayer capacitor having the same

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- Number: US 2017/0287639 A1
- Document ID: US20170287639A1
- Status: Published application
- Kind: A1
- Application number: 15/289,603
- Filed: 2016-10-10
- Published: 2017-10-05
- Earliest claimed: 2016-03-31
- Assignees: Samsung Electro-Mechanics Co., Ltd.
- Applicants: Samsung Electro-Mechanics Co., Ltd.
- Inventors: Ho Sam CHOI; Jong Ho LEE; Min Hoe KIM
- Web page: https://patentgrep.com/patent/US20170287639A1

## CPC

- H01G 4/30: Stacked capacitors (H01G4/33 takes precedence)
- B32B 18/00: Layered products essentially comprising ceramics, e.g. refractory products
- C04B 35/4682: {based on BaTiO3 perovskite phase}
- C04B 35/491: based on lead zirconates and lead titanates {, e.g. PZT}
- H01G 4/005: Electrodes
- H01G 4/1209: {characterised by the ceramic dielectric material (H01G4/1272, H01G4/1281 take precedence)}
- H01G 4/1227: {based on alkaline earth titanates}
- H01G 4/224: Housing; Encapsulation
- H01G 4/228: Terminals
- C04B 2235/3208: Calcium oxide or oxide-forming salts thereof, e.g. lime
- C04B 2235/3215: Barium oxides or oxide-forming salts thereof
- C04B 2235/6582: Hydrogen containing atmosphere
- C04B 2235/77: Density
- C04B 2235/96: Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B 2237/346: Titania or titanates
- C04B 2237/348: Zirconia, hafnia, zirconates or hafnates
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE

## Abstract

A ceramic composition includes a ceramic powder and a phosphor (P). The phosphor (P) has a content of 1 to 2 wt %, based on a total weight of the ceramic powder not including the phosphor (P).

## Claims

### Claim 1

A ceramic composition comprising:
a ceramic powder and a phosphor (P),
wherein the phosphor (P) has a content of 1 to 2 wt %, based on a total weight of the ceramic powder not including the phosphor (P).

### Claim 2 (depends on 1)

The ceramic composition of claim 1, wherein the ceramic powder includes BaTiO3.

### Claim 3

A multilayer capacitor comprising:
a capacitor body having an active region including a plurality of dielectric layers and first and second internal electrodes alternately disposed with the plurality of dielectric layers interposed therebetween and respectively exposed to opposite surfaces of the capacitor body and cover layers disposed on upper and lower surfaces of the active region; and
first and second external electrodes electrically connected to the exposed portions of the first and second internal electrodes on the capacitor body, respectively, wherein a phosphor (P) is included in the cover layers of the capacitor body.

### Claim 4 (depends on 3)

The multilayer capacitor of claim 3, wherein the active region does not include the phosphor (P).

### Claim 5 (depends on 3)

The multilayer capacitor of claim 3, wherein the cover layers of the capacitor body include 1 to 2 wt % of the phosphor (P), based on a total weight of a ceramic powder not including the phosphor (P).

### Claim 6 (depends on 5)

The multilayer capacitor of claim 5, wherein the ceramic powder includes BaTiO3.

### Claim 7 (depends on 3)

The multilayer capacitor of claim 3, wherein a ratio of a difference in widths of the upper and lower cover layers to a width of the active region is less than 1.5%.