A glow discharge tube comprising a gas-sealed envelope, a first electrode, and a second electrode. The gas-sealed envelope defining an interior with an interior surface defining a first interior portion with a first interior surface and a second interior portion with a second interior surface. The first electrode being located within the first interior portion, and the second electrode being located within and in contact with the second interior portion.

A glow discharge tube comprising a gas-sealed envelope, a first electrode, and a second electrode. The gas-sealed envelope defining an interior with an interior surface defining a first interior portion with a first interior surface and a second interior portion with a second interior surface. The first electrode being located within the first interior portion, and the second electrode being located within and in contact with the second interior portion.

The present approach relates to generating seed electrons at a spark gap in the absence of .sup.85Kr. The present approach utilizes electron emission from a triple-point instead to provide seed electrons to reduce the statistical time lag of a spark gap. In one such implementation, a spark gap a spark gap may be fabricated and/or operated without a radioactive component without otherwise changing its overall form or function of the spark gap.

A spark gap including a capacitive energy store is provided. The spark gap is fed via a multiplicity of capacitors arranged in a form of a ring, wherein the capacitors are electrically connected to the anode and the cathode via ring-shaped and conical or funnel-shaped conductors. As a result, sudden changes in impedance can be avoided. At the same time, it is possible to realize as large a cross-sectional area of the conductor as possible within a very small space. Therefore, the spark gap has a switching response with a high rate of rise of the voltage pulse as soon as the spark gaps flash over. This results in an easily predictable switching response of the spark gap. The spark gap can be used, for example, to generate pulses of monochromatic X-ray radiation.

A spark gap including a capacitive energy store is provided. The spark gap is fed via a multiplicity of capacitors arranged in a form of a ring, wherein the capacitors are electrically connected to the anode and the cathode via ring-shaped and conical or funnel-shaped conductors. As a result, sudden changes in impedance can be avoided. At the same time, it is possible to realize as large a cross-sectional area of the conductor as possible within a very small space. Therefore, the spark gap has a switching response with a high rate of rise of the voltage pulse as soon as the spark gaps flash over. This results in an easily predictable switching response of the spark gap. The spark gap can be used, for example, to generate pulses of monochromatic X-ray radiation.

An ESD protection device includes: a first insulating layer (2a); a second insulating layer (2b) stacked on the first insulating layer (2a); a first via conductor (6a) extending through the first insulating layer (2a) in a thickness direction; a discharge gap portion (10) provided so as to be in contact with the first via conductor (6a), between the first insulating layer (2a) and the second insulating layer (2b); a first wiring line (7a) that is arranged on a surface of the first insulating layer (2a) opposite to the discharge gap portion (10) and that is electrically connected to the first via conductor (6a); and a second wiring line (7b) that is arranged on one surface of the second insulating layer (2b) and that includes a portion facing the first via conductor (6a) with at least the discharge gap portion (10) interposed therebetween.

An ESD protection device includes: a first insulating layer (2a); a second insulating layer (2b) stacked on the first insulating layer (2a); a first via conductor (6a) extending through the first insulating layer (2a) in a thickness direction; a discharge gap portion (10) provided so as to be in contact with the first via conductor (6a), between the first insulating layer (2a) and the second insulating layer (2b); a first wiring line (7a) that is arranged on a surface of the first insulating layer (2a) opposite to the discharge gap portion (10) and that is electrically connected to the first via conductor (6a); and a second wiring line (7b) that is arranged on one surface of the second insulating layer (2b) and that includes a portion facing the first via conductor (6a) with at least the discharge gap portion (10) interposed therebetween.

The present invention relates to an electrostatic discharge protection device provided with an insulating laminate containing a first and a second insulating substrate stacked there, a first and a second discharge electrode disposed inside the insulating laminate, a first insulating layer having glass disposed on the side surfaces of the first and the second discharge electrodes, a second insulating layer having glass disposed on the main surfaces of the first and the second discharge electrodes, and an discharge inducing section disposed between the side surfaces of the first and the second discharge electrode, wherein, the distance between the side surfaces of the first and the second discharge electrodes was set as ΔG and the thickness of the second insulating layer was set as ΔZ which two adapt to inequations 3 μm≦ΔZ≦35 μm and ΔG≦40 μm.

An ESD protection device includes a bare unitary body, and a first discharge electrode and a second discharge electrode that are disposed inside the bare unitary body. The first discharge electrode and the second discharge electrode are opposed to each other with a gap interposed therebetween. The bare unitary body includes a cavity in which the gap between the first discharge electrode and the second discharge electrode is located, and to which the first discharge electrode and the second discharge electrode are exposed. A first space of the cavity on a side closer to the first discharge electrode is smaller than a second space of the cavity on a side closer to the second discharge electrode.

An ESD protection device includes a bare unitary body, and a first discharge electrode and a second discharge electrode that are disposed inside the bare unitary body. The first discharge electrode and the second discharge electrode are opposed to each other with a gap interposed therebetween. The bare unitary body includes a cavity in which the gap between the first discharge electrode and the second discharge electrode is located, and to which the first discharge electrode and the second discharge electrode are exposed. A first space of the cavity on a side closer to the first discharge electrode is smaller than a second space of the cavity on a side closer to the second discharge electrode.