公开(公告)号：CA2188802C

公开(公告)日：2001-12-11

申请号：CA2188802

申请日：1996-02-29

Applicant: MATSUSHITA ELECTRONICS CORP

Inventor： SAKURAI HIROSHI ,  HAYASHIDA YOSHIKI ,  KUBO MASAYUKI ,  YAMASHITA KATSUYUKI

IPC: H01J1/142 ,  H01J29/04

Abstract: A cathode for an electron tube formed by coating the base of the cathode for the electron tube With an alkaline-earth metal carbonate containing at least barium as the alkaline-earth metal, and thermally decomposing in a vacuum to generate an emitter mainly comprising an alkaline-earth metal oxide, wherein a mixture of two or more kinds of alkaline-earth metal carbonate crystalline particles having different shapes is used as the above mentioned alkaline-earth metal carbonate. Since the present invention can provide a cathode for electron tube having improved both cut-off drift and emission characteristic at the same time, it is useful as a cathode for the electron gun of a CRT, or a cathode for the electron gun of an electron microscope.

公开(公告)号：CA2220537A1

公开(公告)日：1998-05-12

申请号：CA2220537

申请日：1997-11-10

Applicant: MATSUSHITA ELECTRONICS CORP

Inventor： KAWASAKI MASAKI ,  SAKURAI HIROSHI ,  OZAWA TETSURO ,  HAYASHIDA YOSHIKI

IPC: H01J1/142 ,  H01J1/30 ,  B05D3/02 ,  H01J9/02 ,  H01J29/04

Abstract: A cathode for an electron tube is described that has little deterioration of emission current after long operation, is used as a long-life oxide cathode even with high current density in a CRT, and is economical. An emissive material is adhered onto a substrate that is positioned at one opening of a cylindrical sleeve having a built-in heater coil and that includes nickel as a main component by thermally decomposing carbonate including an alkaline earth metal oxide and at least one element selected from the group consisting of titanium, nickel, zirconium, vanadium, niobium and tantalum.

公开(公告)号：NO964573L

公开(公告)日：1997-09-04

申请号：NO964573

申请日：1996-10-28

Applicant: MATSUSHITA ELECTRONICS CORP

Inventor： SAKURAI HIROSHI ,  HAYASHIDA YOSHIKI ,  KUBO MASAYUKI ,  YAMASHITA KATSUYUKI

IPC: H01J1/142

Abstract: A cathode for an electron tube formed by coating the base of the cathode for the electron tube with an alkaline-earth metal carbonate containing at least barium as the alkaline-earth metal, and thermally decomposing in a vacuum to generate an emitter mainly comprising an alkaline-earth metal oxide, wherein a mixture of two or more kinds of alkaline-earth metal carbonate crystalline particles having different shapes is used as the above mentioned alkaline-earth metal carbonate. Since the present invention can provide a cathode for electron tube having improved both cut-off drift and emission characteristic at the same time, it is useful as a cathode for the electron gun of a CRT, or a cathode for the electron gun of an electron microscope.

公开(公告)号：CA2188802A1

公开(公告)日：1997-08-30

申请号：CA2188802

申请日：1996-02-29

Applicant: MATSUSHITA ELECTRONICS CORP

Inventor： SAKURAI HIROSHI ,  HAYASHIDA YOSHIKI ,  KUBO MASAYUKI ,  YAMASHITA KATSUYUKI

IPC: H01J1/142 ,  H01J29/04

Abstract: A cathode for an electron tube formed by coating the base of the cathode for the electron tube With an alkaline-earth metal carbonate containing at least barium as the alkaline-earth metal, and thermally decomposing in a vacuum to generate an emitter mainly comprising an alkaline-earth metal oxide, wherein a mixture of two or more kinds of alkaline-earth metal carbonate crystalline particles having different shapes is used as the above mentioned alkaline-earth metal carbonate. Since the present invention can provide a cathode for electron tube having improved both cut-off drift and emission characteristic at the same time, it is useful as a cathode for the electron gun of a CRT, or a cathode for the electron gun of an electron microscope.

公开(公告)号：CA2186065A1

公开(公告)日：1997-03-22

申请号：CA2186065

申请日：1996-09-20

Applicant: MATSUSHITA ELECTRONICS CORP

Inventor： OZAWA TETSURO ,  HAYASHIDA YOSHIKI ,  SAKURAI HIROSHI

IPC: H01J29/04 ,  H01J1/142 ,  H01J1/316 ,  H01J9/04 ,  H01J9/08

Abstract: An emitter material for a CRT comprises mixed crystal or solid solution of at least two kinds of alkaline earth metal carbonate, wherein at least one alkaline earth metal carbonate is dispersed or separated in the mixed crystal or solid solution. The alkaline earth metal carbonate, which is an emitter material for the CRT. is coated onto the base metal and thermally decomposed in a vacuum to form an emitter of an alkaline earth metal. This emitter, which is proper for a larger screen size, high brightness and high resolution CRT, can be provided with enough life characteristics even under the operating condition of the emission current density of 2A/cm2.

公开(公告)号：NO975206L

公开(公告)日：1998-05-13

申请号：NO975206

申请日：1997-11-12

Applicant: MATSUSHITA ELECTRONICS CORP

Inventor： HAYASHIDA YOSHIKI ,  OZAWA TETSURO ,  SAKURAI HIROSHI ,  KAWASAKI MASAKI

IPC: H01J1/142

公开(公告)号：NO963972A

公开(公告)日：1997-03-24

申请号：NO963972

申请日：1996-09-20

Applicant: MATSUSHITA ELECTRONICS CORP

Inventor： OZAWA TETSURO ,  HAYASHIDA YOSHIKI ,  SKURAI HIROSHI

IPC: H01J29/04 ,  H01J1/142 ,  H01J1/316 ,  H01J9/04 ,  H01J1/14

CPC classification number: H01J9/042 ,  H01J1/142 ,  H01J1/316

公开(公告)号：NO964573D0

公开(公告)日：1996-10-28

申请号：NO964573

申请日：1996-10-28

Applicant: MATSUSHITA ELECTRONICS CORP

Inventor： SAKURAI HIROSHI ,  HAYASHIDA YOSHIKI ,  KUBO MASAYUKI ,  YAMASHITA KATSUYUKI

IPC: H01J1/142 ,  H01J

Abstract: A cathode for an electron tube formed by coating the base of the cathode for the electron tube with an alkaline-earth metal carbonate containing at least barium as the alkaline-earth metal, and thermally decomposing in a vacuum to generate an emitter mainly comprising an alkaline-earth metal oxide, wherein a mixture of two or more kinds of alkaline-earth metal carbonate crystalline particles having different shapes is used as the above mentioned alkaline-earth metal carbonate. Since the present invention can provide a cathode for electron tube having improved both cut-off drift and emission characteristic at the same time, it is useful as a cathode for the electron gun of a CRT, or a cathode for the electron gun of an electron microscope.

公开(公告)号：NO963972D0

公开(公告)日：1996-09-20

申请号：NO963972

申请日：1996-09-20

Applicant: MATSUSHITA ELECTRONICS CORP

Inventor： OZAWA TETSURO ,  HAYASHIDA YOSHIKI ,  SKURAI HIROSHI

IPC: H01J29/04 ,  H01J1/142 ,  H01J1/316 ,  H01J9/04 ,  H01J

Abstract: An emitter material for a CRT comprises a mixed crystal or a solid solution of at least two kinds of alkaline earth metal carbonate, wherein at least one alkaline earth metal carbonate is dispersed or separated in the mixed crystal or solid solution. The alkaline earth metal carbonate, which is a material for an emitter 4 for the CRT, is coated onto the base metal 3 and thermally decomposed in a vacuum to from an emitter of an alkaline earth metal. This emitter, which is proper for a larger screen size, high brightness and high resolution CRT, can be provided with enough life characteristics even under the operating condition of the emission current density of 2A/cm .

公开(公告)号：CA2220537C

公开(公告)日：2005-10-18

申请号：CA2220537

申请日：1997-11-10

Applicant: MATSUSHITA ELECTRONICS CORP

Inventor： HAYASHIDA YOSHIKI ,  OZAWA TETSURO ,  SAKURAI HIROSHI ,  KAWASAKI MASAKI

IPC: H01J1/142 ,  H01J1/30 ,  B05D3/02 ,  H01J9/02 ,  H01J29/04

Abstract: A cathode for an electron tube is described that has little deterioration of emission current after long operation, is used as a long-li fe oxide cathode even with high current density in a CRT, and is economical. An emissive material is adhered onto a substrate that is positioned at o ne opening of a cylindrical sleeve having a built-in heater coil and that includes nickel as a main component by thermally decomposing carbonate including an alkaline earth metal oxide and at least one element selected from the group consisting of titanium, nickel, zirconium, vanadium, niobium and tantalum.