Micro-channel plate

• US 20040005433A1
• Filed: 12/06/2002
• Published: 01/08/2004
• Est. Priority Date: 06/08/2000
• Status: Abandoned Application

• Current Assignee: Hamamatsu Photonics KK
• Original Assignee: Hamamatsu Photonics KK
• Inventors: Uchiyama, Toshiyuki, Sugawara, Takeo, Matsuura, Shigeki, Kusuyama, Yutaka, Iguchi, Masahiko
• Application Number:
  US10/297,406
• Publication Number:
  US 20040005433A1
• Time in Patent Office: Days
• US Class Current: 428/66.6
• CPC Class Codes: C03C 3/07 containing lead
• CPC Class Codes: C03C 3/102 containing lead
• CPC Class Codes: C03C 3/105 containing aluminium
• CPC Class Codes: H01J 43/246 Microchannel plates [MCP] image amplification tubes using MCP H01J31/507
• CPC Class Codes: Y10T 428/218 Aperture containing

Abstract

A MCP 1 according to the present invention is one in which outer circumferential glass 5 is disposed around channel glass 3 that is provided with a plurality of channels 7 in a long and thin hole shape and is formed in a plate shape. This channel glass 3 contains 35 to 55% of SiO₂, 0 to 5% of Al₂O₃, 25 to 46% of PbO, 0.5 to 10% of Σ(Li₂O+Na₂O+K₂O), 0.1 to 8% of Σ(Rb₂O+Cs₂O), 0 to 5% of Σ(MgO+CaO+SrO+BaO), 0.1 to 7% of ZrO₂, and 0 to 5% of Bi₂O₃ (all the above % are wt %). With such a composition, a sufficient glass network structure is formed in the channel glass 3. Moreover, the channel glass 3 can be sufficiently restricted from becoming porous, and moisture can be restricted from being adsorbed thereto. As results of these, a change with time, such as a “warp” can be sufficiently restricted from being generated even in a high-humidity environment.

Claims

1. A micro-channel plate, comprising a glass base formed in a plate shape in which a plurality of channels are provided along a thickness direction thereof,

wherein an inner diameter of the channels is 1 to 6 μ

m, and

the glass base is formed of a composition containing PbO, alkaline metal oxide and ZrO₂ in SiO₂.

2. The micro-channel plate according to claim 1,

wherein the glass base is formed of a composition shown below:

SiO₂;

35 to 55 wt %;

Al₂O₃;

0 to 5 wt %;

PbO;

25 to 46 wt %;

Σ

(Li₂O+Na₂O+K₂O);

0.5 to 10 wt %;

Σ

(Rb₂O+Cs₂O);

0.1 to 8 wt %;

Σ

(MgO+CaO+SrO+BaO);

0 to 5 wt %;

ZrO₂;

0.1 to 7 wt %; and

Bi₂O₃;

0 to 5 wt %.

3. The micro-channel plate according to claim 1 or 2,

wherein an interval (pitch) between center axes of the respective channels along the thickness direction of the glass base is 1.2 to 7.5 μ

m.

4. The micro-channel plate according to claim 1 or 2, wherein a thickness of the glass base is 0.05 to 0.9 mm.

5. The micro-channel plate according to claim 1 or 2,

wherein an interval (pitch) between center axes of the respective channels along the thickness direction of the glass base is 1.2 to 7.5 μ

m, and

a thickness of the glass base is 0.05 to 0.9 mm.