RU2277735C1 - Gas panel - Google Patents

Abstract

FIELD: electronic engineering; development of gas panels.

SUBSTANCE: proposed gas panel has display cells with preset electrode-to-electrode distance. Novelty is that insulating barriers made of refractory filler and soft glass with deformation temperature t_d1 carrying conductors on their top bases are covered under conductors with insulating layer of refractory filler and soft glass whose deformation temperature t_d2 equals 1.07 to 1.17 t_d1 of thickness amounting to 0.15 - 04 of insulating barrier height. Amount of soft glass in insulating barriers and coating is 0.6 - 1.5 of refractory filler.

EFFECT: enhanced stability of insulating barrier shape.

2 cl, 1 dwg

Description

The invention relates to electronic equipment and can be used in the manufacture of gas discharge indicator panels (GUI).

A well-known ISU containing two dielectric plates with orthogonally oriented and mutually aligned systems of protrusions and grooves made by the milling method, display cells formed at the crosshairs of wire anodes and cathodes located in grooves (Auth. Certificate. No. 533996, H 01 J 17/48 , 1976).

The disadvantage of this GUI is the high complexity and technological complexity of providing a normalized interelectrode distance.

Known HIP, containing the upper dielectric plate and the lower dielectric plate, on which mutually orthogonal dielectric barriers are formed from a material including alundum and low-melting glass (LPS), cells formed at the crosshairs of wire electrodes located on dielectric barriers orthogonal to them (Pat. RF No. 2214017 H 01 J 9/02, 2003).

The disadvantage of this GUI is the complexity of the manufacturing process associated with the alignment of structural elements.

In addition, when winding wire conductors on dielectric barriers formed by the screen printing method, during heat treatment, a strong deepening of wire conductors in the extreme dielectric barriers is observed, leading to a decrease in the interelectrode distance.

Closest to the claimed invention is a GUI containing a first dielectric plate and a second dielectric plate, on the inner surface of which there are dielectric barriers made of a material including a refractory filler and LPS with a deformation temperature t _d1 , indication cells formed at the crosshairs of the first conductors located between the dielectric barriers, and second conductors placed on dielectric barriers (US Pat. RF No. 2236058, H 01 J 17/49, 2004 - prototype).

The disadvantage of this GUI is the high likelihood of deepening the wire conductors to extreme dielectric barriers during heat treatment due to the insignificant difference between the deformation temperature of the LPS in the composition of the material of the dielectric barriers and the maximum allowable temperature dispersion in the technological equipment, as well as the lack of the possibility of unification of technological modes.

As a result of this, the interelectrode distance in the extreme display cells decreases, which can lead to a short circuit of the conductors.

The objective of the invention is the creation of the ISU, the display cell which is made with a given interelectrode distance.

The specified technical result is achieved by the fact that in the known GUI containing the first dielectric plate and the second dielectric plate, on the inner surface of which there are dielectric barriers of refractory filler and LPS with a deformation temperature t _d1 , indication cells formed at the crosshairs of the first conductors located between the dielectric barriers, and second conductors located on dielectric barriers, on the upper base of the dielectric barriers under the second conductors of nan A dielectric coating with a thickness of 0.15 ÷ 0.4 of the height of the dielectric barriers made of a refractory filler and LPS with a deformation temperature t _d2 equal to 1.07 ÷ 1.17 t _{d1 is provided} .

The location of the conductors on a dielectric coating deposited with a thickness of 0.15 ÷ 0.4 of the height of the dielectric barriers made of a material including a refractory filler and LPS with a deformation temperature t _{d2 of} 1.07 ÷ 1.17 deformation temperature t _d1 LPS, which is part of the dielectric barriers, eliminates the softening of the material of the upper part of the dielectric barriers and the deepening of the conductors in them.

If the LPS in the composition of the dielectric coating will have t _d2 <1.07 t _d1 , then during the thermal treatments the dielectric coating softens and the wire conductors are deepened into it in the extreme dielectric barriers.

If t _d2 > 1.17 t _d1 , then during the heat treatment the LPS does not melt the dielectric coating (“vitrification”), in which case the dielectric coating has a loose structure and low mechanical strength.

To ensure the mechanical strength of the dielectric coating to the effects of the tension forces of the wire conductors during softening of the dielectric coating, its thickness should be 0.15 ÷ 0.4 of the height of the dielectric barriers.

If the thickness of the dielectric coating is less than 0.15 of the height of the dielectric barriers, then during the heat treatment there is a mutual diffusion of the materials of the dielectric barriers and the coating, their mixing, a decrease in the thickness of the dielectric coating and the deterioration of its mechanical properties.

If the thickness of the dielectric coating is more than 0.4 of the height of the dielectric barriers, then upon annealing, cracking of the dielectric barriers occurs due to the significant difference in the CTE of the LPSs that are part of the dielectric coating and dielectric barriers.

Ensuring the shape stability of dielectric barriers and coatings in the GUI is achieved by making them from a mixture of a refractory filler and a binder - LPS. The best results for the ISU are obtained if the LPS material is 0.6–1.5 refractory filler.

If the amount of LPS in the materials of dielectric barriers and coating is less than 0.6 of the amount of refractory filler, then it is not enough to completely wet the particles of refractory material and their adhesion during reflow. In this case, since the dielectric barriers will have a loose and mechanically unstable structure, the wire conductors are deepened in them during subsequent heat treatments.

If the amount of LPS is more than 1.5 the amount of refractory filler, then during the heat treatment during melting of the LPS it shrinks, which does not ensure the dimensional stability of the structural elements of the ISU.

The analysis of the prior art by the applicant, including a search by patents and scientific and technical sources of information, and the identification of sources containing information about analogues of the claimed invention, allow us to establish that the applicant has not found an analogue characterized by features identical to those of the claimed invention, and a definition from the list of identified analogues of the prototype, as the closest in the totality of the features of the analogue, allowed to identify the set of essential in relation to the applicant to technical result of the characterizing features claimed in the object set forth in the claims.

Therefore, the claimed invention meets the requirement of "novelty" under applicable law.

To verify the conformity of the claimed invention to the requirement of the inventive step, an additional search was carried out for known solutions in order to identify features that match the distinctive features of the claimed invention, the results of which show that the claimed invention does not explicitly follow from the prior art, as it has not been identified technical solutions in which ensuring a given interelectrode distance in the indication cells would be achieved by forming on the upper bases of the dielectric barriers under the conductors of the dielectric coating with a thickness of 0.15 ÷ 0.4 of the height of the dielectric barriers made of a material including a refractory filler and LPS with a temperature t _{d2 of} 1.07 ÷ 1.17 temperature t _d1 LPS, which is part of the material of dielectric barriers, and ensuring the dimensional stability of dielectric barriers due to the use of LPS in them and in the dielectric coating in an amount of 0.6 ÷ 1.5 of the amount of refractory filler.

The claimed invention is illustrated in the drawing,

where one of the variants of the declared ISU is presented.

The ISU includes the first (upper) 1 and second (lower) 2 dielectric plates, indication cells formed at the crosshairs of the wire anodes 3 and cathodes 4, mutually orthogonal systems of the first dielectric barriers 5 and the second dielectric barriers 6 located between the wire anodes 3 and deposited on their upper the base with a dielectric coating 7, on which the wire cathodes 4 are placed, a phosphor 8, deposited on the inner surface of the second dielectric plate between the dielectric barriers 5 and 6 under the wire anodes 3.

To display information in the selected display cells, a gas discharge is excited by applying voltage pulses to the wire anodes 3 and cathodes 4. The ultraviolet radiation of the discharge excites the glow of the phosphor 8.

To obtain a glow of indication cells with different brightness, pulse-width modulation is introduced.

Concrete example

The DCI ISU contains the upper and lower dielectric plates measuring 193 × 193 × 2.5 mm. Mutually orthogonal first dielectric barriers with a height of h ₁ = 0.32 mm with a pitch of 6 mm and second dielectric barriers with a height of h ₂ = 0.32 mm with a pitch of 2 mm are formed on the lower dielectric plate. The width of the first and second dielectric barriers is d = 0.5 mm. A 0.1 mm thick dielectric coating is applied to the upper base of the second dielectric barriers. The dielectric barriers are made of material including LPS - S82-5 with t _d1 = 430 ± 10 ° C and the Alundum in the ratio 1: 1, and a dielectric coating material comprising LPS - S71-2 with t _d2 = 480 ± 10 ° C and alund in a ratio of 1: 1.

Indication cells bounded by dielectric barriers are formed at the crosshairs of wire anodes and cathodes. Anodes made of 47ND wire with a diameter of 0.12 mm are wound between the second dielectric barriers above the phosphor coating deposited on the inner surface of the lower dielectric plate between the first and second dielectric barriers. The thickness of the phosphor coating is 0.07 mm.

At a distance of 0.28 mm from the anodes and orthogonally located wire cathodes of material 47ND with a diameter of 0.12 mm. The cathodes are placed on the dielectric coating of the second dielectric barriers orthogonal to them.

The ISU is filled with a mixture of inert gases Ne + 30% Xe to a pressure of 105 mm Hg. with mercury vapor.

In this GUI, there is no scatter in the values of the interelectrode distance in the indication cells associated with the deepening of the wire conductors into the extreme dielectric barriers.

Thus, the proposed invention allows to obtain a GUI with indication cells having a given interelectrode distance.

Claims (2)

1. A gas-discharge indicator panel containing an upper dielectric plate and a lower dielectric plate, on the inner surface of which there are dielectric barriers of refractory filler and low-melting glass with a deformation temperature t _d1 , indication cells formed at the crosshairs of the first conductors located between the dielectric barriers, and second conductors placed on dielectric barriers, characterized in that on the upper base of the dielectric barriers under the second conductors they applied a dielectric coating with a thickness of 0.15-0.4 of the height of the dielectric barriers made of refractory filler and low-melting glass with a deformation temperature t _d2 equal to 1.07-1.17 t _d1 . 2. The gas-discharge indicator panel according to claim 1, characterized in that in dielectric barriers and coating, low-melting glass is 0.6-1.5 refractory filler.