CN100483602C - Method for preparing upper and lower medium substrate of AC gas discharge display screen - Google Patents

Abstract

The invention discloses a manufacture method for upper and lower medium basal plates in ac gas discharge display screen, which comprises: preparing upper/lower medium missing printing boards with figure added medium line of 3~8mm width and 8~50um thickness based on the original; manufacturing ITO, BUS conflux electrode and black strip on upper glass base by turns, then preparing transparent medium layer with upper medium missing printing board, and forming MgO protection layer; adding Add electrode on lower glass base, preparing lower medium layer with lower medium missing printing board, then forming barrier with normal technology and red, green and blue fluorescent powder, and finally forming glass sealing frame of low-melting point on lower medium layer and ensuring the low-melting point glass line brim in order after pre-sintering. When sealing upper and lower base, clamping the low-melting point glass frame between two base medium to ensure it vapor-tight when exhausting.

Description

A kind of preparation method of upper and lower medium substrate of AC gas discharge display screen

Technical field

The invention belongs to color picture tube (display device) making field, relate to the preparation method of AC gas discharge display screen, particularly a kind of preparation method of upper and lower medium substrate of AC gas discharge display screen.

Background technology

AC gas discharge display screen is made up of upper and lower two glass substrates, forms transparency electrode ITO, BUS bus electrode, secret note, transparent medium and mgo protection layer on top glass substrate.On lower glass substrate, form Add electrode, following dielectric layer, barrier, fluorescent material and frit seal frame (referring to Fig. 1).And in the manufacture craft process of existing frit seal frame, the long limit of infrabasal plate is coated in down on the dielectric layer, and minor face then is applied to the surface of light glass substrate.Because substrate is inconsistent, this just causes the line thickness that applies under identical condition inconsistent, the lines edge such as the zigzag of minor face behind sintering, and non-rectilinear, the bad product that the result causes upper and lower base plate to leak gas when sealing-in exhaust easily brings loss to production in enormous quantities.

Summary of the invention

In order to reduce when the sealing-in exhaust because the low-melting glass line causes the bad generation of gas leakage, improve the yields of envelope row operation, the objective of the invention is to, a kind of preparation method of upper and lower medium substrate of improved AC gas discharge display screen is provided, the line thickness unanimity of the upper and lower medium substrate of this method preparation, the edge is neat, can reduce gas leakage.

In order to realize above-mentioned task, the present invention takes following technical scheme:

A kind of preparation method of upper and lower medium substrate of AC gas discharge display screen is characterized in that, follows these steps to carry out:

1) make the upper and lower medium stencil at first respectively, the figure of this upper and lower medium stencil increases width on the figure of former upper and lower medium stencil be 3～8mm, the medium lines of thickness 8～50um;

2) the transparency electrode ITO that on the glass substrate of upper substrate, completes successively, the BUS bus electrode after the secret note, is used the medium stencil and is made transparent dielectric layer, forms the MgO diaphragm at last;

3) after forming the Add electrode on the glass substrate of infrabasal plate, make transparent dielectric layer with following medium stencil, form barrier by normal process then, the red, green, blue three-color phosphor, use medium stencil system formation frit seal frame down at last again, low-melting glass is coated on the transparent medium surface.

The present invention is 3～8mm owing to increase width on the figure of former upper and lower medium stencil, the medium lines of thickness 8～50um, make transparent dielectric layer, guaranteed the line thickness unanimity of coating, make frit seal frame line fully on the transparent medium surface, line edge neat and consistent after giving sintering has prevented that effectively the frit seal frame is air tight when sealing-in exhaust.

Description of drawings

Fig. 1 is the structural representation of PDP;

Fig. 2 is the dielectric-slab figure of going up of the present invention, and wherein (a) is the last dielectric-slab figure of prior art, (b) is the improved dielectric-slab figure of going up;

Fig. 3 is a dielectric-slab figure down of the present invention, and wherein (a) is the following dielectric-slab figure of prior art, (b) is improved dielectric-slab figure down;

Fig. 4 is the structural representation of the PDP after improving.

Symbol among the above-mentioned figure is respectively: 1, top glass substrate; 2, secret note; 3, transparency electrode ITO; 4, BUS bus electrode; 5, transparent medium; 6, MgO protective layer; 7, lower glass substrate; 8, ADD addressing electrode; 9, following dielectric layer; 10, barrier; 11, fluorescent material, 12, the frit seal block diagram.

The invention will be further described below in conjunction with accompanying drawing.

Embodiment

The preparation method of the upper and lower medium substrate of AC gas discharge display screen of the present invention follows these steps to carry out:

1) at first upper and lower base plate medium figure is redesigned, make the upper and lower medium stencil respectively, use the method for silk screen printing, the figure of this upper and lower medium stencil increases width on the figure of former upper and lower medium stencil be 3～8mm, the medium lines of thickness 8～50um;

2) ito transparent electrode 3 that completes successively on the glass substrate 1 of upper substrate after BUS bus electrode 4 and the secret note 2, is used the medium stencil and is made transparent dielectric layer 5, forms MgO diaphragm 6 at last;

3) after forming Add electrode 8 on the glass substrate 7 of infrabasal plate, with dielectric layer 9 under the medium stencil is made down, then by forming barrier 10, red, green, blue three-color phosphor 11, use medium stencil system formation frit seal frame 12 down at last again, low-melting glass is coated on the transparent medium surface.

In Fig. 2～3, the following dielectric-slab figure of prior art is seen figure (a), and improved dielectric-slab figure is down seen figure (b).

By changing the figure of upper and lower base plate medium, improved consistent the going and the edge regularity of width of frit seal line, guarantee low-melting glass line line edge neat and consistent after giving sintering, during sealing-in, low-melting glass frame 12 is clipped in the upper and lower base plate medium (5,9), guarantees that the frit seal frame is air tight when exhaust.

Claims (1)

1. the preparation method of the upper and lower medium substrate of an AC gas discharge display screen is characterized in that, follows these steps to carry out:

1) make the upper and lower medium stencil at first respectively, the figure of this upper and lower medium stencil is 3～8mm with increasing width on the corresponding position, sealing-in frame position on the graph edge portion inward direction of former upper and lower medium stencil, the medium lines of thickness 8～50um;

2) behind the ITO that completes successively on the glass substrate of upper substrate, BUS electrode, use the medium stencil and make transparent dielectric layer, form the MgO diaphragm at last;

3) after forming the Add electrode on the glass substrate of infrabasal plate, make transparent dielectric layer with following medium stencil, form barrier by normal process then, the red, green, blue three-color phosphor, make the frit seal frame with following medium stencil more at last, low-melting glass is coated on the transparent medium surface.

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