CN101388313A

CN101388313A - Plasma display panel and manufacturing method therefor

Info

Publication number: CN101388313A
Application number: CNA2008102131187A
Authority: CN
Inventors: 权泰正
Original assignee: Samsung SDI Co Ltd
Current assignee: Samsung SDI Co Ltd
Priority date: 2007-09-12
Filing date: 2008-09-12
Publication date: 2009-03-18
Also published as: JP2009070791A; KR100882698B1; EP2037480A1

Abstract

The invention discloses a plasma display panel and a manufacturing method thereof. The plasma display panel includes a front plate and a back plate spaced from and facing each other with a barrier rib therebetween, the front plate and the back plate each having a long side and a short side. A first sealant is at the long side between the front plate and the back plate and a second sealant is at the short side between the front plate and the back plate to seal a discharge space divided by the barrier rib between the front plate and the back plate. A first spacer is in the first sealant and a second spacer is in the second sealant, the second spacer having a smaller volume than the first spacer.

Description

Plasma display and manufacture method thereof

The application requires priority and the rights and interests at the 10-2007-0092648 korean patent application of Korea S Department of Intellectual Property submission on September 12nd, 2007, and the full content of this application is contained in this by reference.

Technical field

The present invention relates to a kind of plasma display and manufacture method thereof.

Background technology

Plasma display (PDP) comprises header board and back plate, and header board has X-Y electrode, dielectric and the MgO film on the transparent substrates of being formed on, and back plate has and is formed on another suprabasil addressing electrode, dielectric, barrier rib and phosphor.Header board and back plate are separated from each other by the barrier rib.In addition, plasma display is applied to addressing electrode and Y electrode by the control circuit of installing with signal, thereby selects to be used for luminous arc chamber.Signal alternately is applied to the X-Y electrode, thereby shows still image or moving image.Drive X-Y electrode and addressing electrode by control circuit.

Under the situation of above-mentioned plasma display, with after harden and be incorporated in the technical process of header board, owing to the difference of the shrinkage of barrier rib and/or sealant causes panel can be crooked or can additionally twist, perhaps between the header board of panel and back plate, can produce unnecessary gap.Described unnecessary gap can cause the header board of panel and afterwards the distance between the plate is inconsistent, thereby causes producing in panel noise.Specifically, being formed on gap in the radioshadow (dummy region) of panel after the combined process of panel is one of main source of the noise that produces in panel.

Summary of the invention

Many-side of the present invention provides a kind of plasma display and manufacture method thereof that can reduce by the noise of inconsistent distance generation between header board and the back plate.In addition, many-side of the present invention provides a kind of plasma display and manufacture method thereof, wherein, this plasma display floater can prevent or significantly reduce utilize sealant with after harden that the long leg that is incorporated into the panel that causes in the process in the space between header board and the evacuated panels divides and short side part on the adverse effect that causes of the shrinkage difference of sealant.

One embodiment of the present of invention provide a kind of plasma display, this plasma display floater comprises header board and back plate, header board and back plate are spaced apart from each other and facing each other, and have the barrier rib between header board and back plate, and header board and back plate all have long limit and minor face.First sealant is at described place, long limit and between header board and back plate, and second sealant is at described minor face place and between header board and back plate, and first sealant and second sealant are used to seal the discharge space of being divided by the barrier rib between header board and back plate.A plurality of first spacers are in first sealant, and a plurality of second spacers are in second sealant, and the volume of each second spacer in a plurality of second spacers is less than the volume of each first spacer in a plurality of first spacers.

In one embodiment, the difference of the volume of the volume of each first spacer and each second spacer is less than about 10%.In addition, first sealant and second sealant can comprise lead-less glasses material, and the width of first sealant can be greater than the width of second sealant.

The electrod-array that is used for discharging at discharge space can be positioned on the header board and the back plate, and emission is positioned on the plate of back by the phosphor layer of the light of discharge generation.Corresponding to first sealant and the stacked zone of second sealant, this plasma display floater also can be included in the groove at least one in the plate of header board and back.

According to another embodiment of the present invention, a kind of method of making plasma display may further comprise the steps: prepare first sealant in the material sealing agent by first spacer is joined; Prepare second sealant in the material sealing agent by second spacer is joined, the volume of second spacer is less than the volume of first spacer.This method is further comprising the steps of: first sealant is coated to the long leg branch of header board, and second sealant is coated to the short side part of header board; Aim at header board and back plate, and header board is attached to the back plate.

According to another embodiment of the present invention, a kind of method of making plasma display may further comprise the steps: prepare first sealant in the material sealing agent by first spacer is joined; Prepare second sealant in the material sealing agent by second spacer is joined, the volume of second spacer is less than the volume of first spacer.This method also can may further comprise the steps: preparation all has the header board and the back plate of long limit and minor face, and header board and back plate are spaced apart from each other and facing each other, and has the barrier rib between header board and back plate; Corresponding to first sealant and the stacked zone of second sealant, form groove at least one in header board and back plate; First sealant is coated to header board and back at least one the long limit in the plate, and second sealant is coated to the header board and the back minor face of at least one in the plate; Aim at header board and back plate, and header board is attached to the back plate.

Description of drawings

In conjunction with the accompanying drawings to the description of specific embodiment, these and/or other embodiment of the present invention and feature will become clear and be easier to and understand by following, in the accompanying drawings:

Fig. 1 illustrates the decomposition diagram of plasma display according to an embodiment of the invention;

Fig. 2 is along the cutaway view according to the long side direction of the plasma display of comparative examples;

Fig. 3 A illustrates the plane graph of the sealing technology structure before of plasma display according to an embodiment of the invention;

Fig. 3 B is the plane graph that illustrates according to the structure after the sealing technology of the plasma display of a comparative examples;

Fig. 4 A is along the partial sectional view of the long side direction of plasma display according to an embodiment of the invention;

Fig. 4 B is along the partial sectional view of the short side direction of plasma display according to an embodiment of the invention;

Fig. 5 A is the cutaway view that plasma display is shown;

Fig. 5 B and Fig. 5 C are cutaway view and the plane graphs according to the plasma display of the embodiment of the invention;

Fig. 6 A is the curve chart that illustrates according to the noise testing result of the plasma display of comparative examples;

Fig. 6 B illustrates the noise testing result's of plasma display curve chart according to an embodiment of the invention.

Embodiment

In the following detailed description, only illustrate and described specific embodiment of the present invention in the mode that illustrates simply.As the skilled person will appreciate, under all situations that does not break away from the spirit or scope of the present invention, can revise described embodiment in various mode.Therefore, it is illustrative in essence that accompanying drawing and description will be regarded as, rather than restrictive.In addition, when element be known as " " another element " on " time, this element can perhaps can be positioned on another element by being arranged on one or more intermediary element therebetween directly on another element indirectly.Hereinafter, identical label is represented components identical.

Fig. 1 illustrates the decomposition diagram of PDP according to an embodiment of the invention.

With reference to Fig. 1, PDP comprises header board 10 and the back plate 20 that faces with each other.Header board 10 comprises transparency electrode 12a and the 12b that all is formed in the first transparent substrate 11,

bus electrode

13a and 13b, black layer 14, first dielectric layer 15 and passivation layer 16.Back plate 20 comprises addressing electrode 22, second dielectric layer 23, barrier rib 24 and the phosphor layer 25 that all is formed in second substrate 21.PDP also comprises and is used for back plate 20 is attached to the sealant (for example 30a of Fig. 3 B, 30b) of header board 10 and is blended in spacer (spacer) (for example 32 among 31 among Fig. 4 A and Fig. 4 B) in the sealant.

Can comprise (promptly according to the PDP of this embodiment according to the position of sealant, sealant applies the long limit of PDP, still apply the minor face of PDP) the spacer that is provided with different size, thus prevent or significantly reduce in the combined process process of panel inconsistent distance between header board 10 that the difference by the shrinkage of sealant causes and the back plate 20.In addition, can comprise substrate, thereby prevent or significantly reduce in the Overlay District of sealant the inconsistent height of the PDP that (for example PDP corner) may occur with groove according to the PDP of the embodiment of the invention.To carry out following detailed description to described sealant and spacer.

The assembly of panel more particularly, is described in more

detail.Transparency electrode

12a, 12b are used to produce the electrode that discharges and keep discharge.

Form transparency electrode

12a, 12b by the high transparent material of transmission of visible light.For example, can be by ITO, SnO ₂, materials such as ZnO, CdSnO

form transparency electrode

12a, 12b.

Bus electrode

13a, 13b are the electrodes that is used to compensate the high resistance of

transparency electrode

12a, 12b, and the width of

bus electrode

13a, 13b is narrower than the width of

transparency electrode

12a, 12b usually.By having low resistance and not making

bus electrode

13a, 13b with the material of first dielectric layer, 15 reactions.Can adopt the material as

bus electrode

13a, 13b such as gold (Au), silver (Ag).

A transparency electrode 12a and a bus electrode 13a and another transparency electrode 12b and another bus electrode 13b form X-Y electrode pair (hereinafter, being known as the X-Y electrode).

Black layer 14 is arranged between an X-Y electrode and the 2nd X-Y electrode adjacent with an X-Y electrode, to improve contrast.Material very low by transmission of visible light and that the exterior light absorptivity is high forms black layer 14.

First dielectric layer 15 is used to limit discharging current, keeps glow discharge and gathers the wall electric charge.Can form first dielectric layer 15 by withstand voltage height and the high material of transmission of visible light.Can adopt such as PbO-B ₂O ₃-SiO ₂Or Bi ₂O ₃Deng the material of material as first dielectric layer 15.First dielectric layer 15 among the embodiment is formed double-decker, and this double-decker has uniform surface and greater than the thickness of reference thickness.Can utilize printing technology that first dielectric layer among other embodiment is formed to have single or multiple lift the structure of (for example three layers or more layer).

Passivation layer 16 is arranged on first dielectric layer 15, is subjected to ion bombardment and increases secondary electron yield to prevent first dielectric layer 15.Can utilize film deposition techniques high and the resistance excellent material of ion sputtering formed passivation layer 16 by transmission of visible light height, surface insulation performance.Can adopt the material as passivation layer 16 such as MgO.

Addressing electrode 22 is the electrodes that are used to select arc chamber, and is arranged in second substrate 21 according to shape of stripes.The shape of stripes of addressing electrode 22 may be extended to

transparency electrode

12a, 12b with right-angle crossing.Utilize printing technology to form addressing electrode 22 by the material with high conductivity (for example gold (Au), silver (Ag) etc.).

Second dielectric layer 23 is arranged in second substrate 21, to protect addressing electrode 22 and dielectric breakdown strength is provided.Can form second dielectric layer 23 by the high material of light reflectivity, perhaps the material that the available light reflectivity is high carries out painted to second dielectric layer 23.Can adopt PbO, SiO ₂, B ₂O ₃Deng material as second dielectric layer 23.

Barrier rib 24 is used for by preventing that the arc chamber zone from extending and prevent that the mixing of the not desired color of visible light from improving colorimetric purity along the longitudinal direction of transparency electrode 12a, 12b.Barrier rib 24 is mounted to has enough intensity and support header board 10.In order to form a large amount of discharge spacers in limited zone, in one embodiment, narrower barrier rib 24 has width and suitable higher height.In addition, stick with paste the absorption organic substance, can form barrier rib 24 by material with compact texture in order to suppress phosphor.Can adopt PbO, SiO ₂, B ₂O ₃Deng material as barrier rib 24.

Phosphor layer 25 will convert visible light to by the ultraviolet ray of discharge generation, thus visible emitting.Form phosphor layer 25 by material with good light conversion efficiency and good colorimetric purity.Phosphor layer 25 comprises red phosphor layer (R), green phosphor layer (G) and blue phosphor layer (B).

The manufacture method of above-mentioned PDP will be briefly described below according to an embodiment of the invention.

At first, on transparent substrates 11, be formed for the metal film and the black layer 14 of X-Y electrode, and dielectric is printed onto metal film and the black layer 14 that is used for the X-Y electrode.Subsequently, on dielectric layer 15, form passivation layer 16 by deposition MgO film.Prepare header board 10 according to above technology.

Then, the metal film that will be used for addressing electrode 22 is coated to another substrate 21, with this metal film patternization, and prints dielectric on this metal film.Dielectric is printed onto on the dielectric layer 23, utilizes blasting craft on this dielectric, to form barrier rib 24 subsequently.Then, form phosphor layer 25 in the inside of the discharge space of dividing by barrier rib 24.Prepare back plate 20 according to above technology.

Then, sealant is coated on the dielectric layer of prepared header board 10 or back plate 20, and carries out sintering.With header board 10 and back plate 20 aim at, fixing, subsequently at suitable temperature (for example predetermined temperature) sintering header board 10 and back plate 20 down, thereby header board 10 is attached to back plate 20.Subsequently, the discharge space between the header board 10 of the combination of finding time under vacuum condition and the back plate 20 is incorporated into mist in the discharge space under about 500 holders, and seals this space.

With reference to Fig. 2, the shrinkage degree of sealant 30a ' in the seal process of plate during the long leg that is arranged in panel divides is bigger than the shrinkage degree of the sealant in the short side part that is arranged in panel.For example, if first sealant that is arranged in the long leg branch is formed by identical materials with second sealant that is arranged in the short side part, first sealant is about 8 double-lengths of second sealant, and first sealant is identical with the cross section of second sealant, and then the shrinkage degree of first sealant can be greater than about twice of the shrinkage degree of second sealant.Therefore, header board 10 and/or back plate 20 can be crooked, perhaps can occur the gap of not expecting between header board 10 and back plate 20.Here, the described gap of not expecting is corresponding to being arranged in the sealant in the short side part (for example horizontal edge) and being arranged in difference in height between the sealant 30a ' in the long leg branch (for example longitudinal edge).This gap is the one of the main reasons of the noise in the panel.

Usually, for the method that is used to make PDP according to the embodiment of the invention, consider the shrinkage difference of the sealant that occurs after the above-mentioned sealing technology, preparation is coated to the long leg sealant that divides and the sealant that is coated to short side part of panel independently.Therefore, sealant according to the position of panel and differently can keep the constant height of sealant, and irrelevant with the shrinkage difference of sealant.To be described below in more detail according to the header board of the embodiment of the invention and the combined process of back plate.

Fig. 3 A is the plane graph that the sealing technology structure before of PDP according to an illustrative embodiment of the invention is shown.Fig. 3 B is the plane graph that illustrates according to the structure after the sealing technology of the plasma display of a comparative examples.Fig. 4 A is the partial sectional view along the long side direction of according to an illustrative embodiment of the invention PDP, and Fig. 4 B is the partial sectional view along the short side direction of according to an illustrative embodiment of the invention PDP.The cutaway view that partial sectional view shown in Fig. 4 A can intercept corresponding to the line I-I ' along the PDP shown in Fig. 3 B, the cutaway view that the partial sectional view shown in Fig. 4 B can intercept corresponding to the line II-II ' along the PDP shown in Fig. 3 B.

As shown in Figure 3A, the combined process of PDP may further comprise the steps: sealant 30 (for example, comprising the sealant of lead-less glasses material) is coated to header board 10 or back plate 20, and aligning header board 10 and back plate 20 are attached to the back plate with header board, and carry out the introducing of finding time with gas.The width w1 of second sealant in being arranged in first sealant of long leg in dividing and being arranged in short side part is substantially the same.

At this moment, consider in this embodiment owing to be coated to respectively that the long leg of panel divides and the shrinkage of the sealant of short side part there are differences, and the sealant that causes long leg to divide can shrink manyly than the sealant of short side part, when sealant 30, the first relatively large sealant of volume of the spacer that wherein mixes is coated to the long leg branch of header board 10 or back plate 20, the second less relatively sealant of volume of the spacer that wherein mixes is coated to the short side part of header board 10 or back plate 20.In the rectangular display screen curtain of PDP, the limit that long leg divides expression to have length, short side part represents to have the limit of shorter length.

Simultaneously, the second sealant 30b that the PDP of combination for passing through sintering process, the first long sealant 30a are relatively shorter shrinks manyly, shown in Fig. 3 B.Therefore, the width w2 of the first sealant 30a is less than the width w3 of the second sealant 30b.

Yet, shown in Fig. 4 A and Fig. 4 B, in this embodiment, because the volume of first spacer 31 that comprises among the first sealant 30a is greater than the volume of second spacer 32 that comprises among the second sealant 30b, so be arranged in the height h2 that long leg divides the height h1 of the first sealant 30a among the A can be substantially equal to be arranged in the second sealant 30b among the short side part B, and/or be arranged in long leg and divide the width w4 of the first sealant 30a among the A can be substantially equal to be arranged in the width w5 of the second sealant 30b among the short side part B.Therefore, according to embodiments of the invention, the gap that can prevent or significantly reduce after combined process, between header board 10 and back plate 20, to form.

Can be according to the volume of suitably adjusting first spacer 31 and second spacer 32 in conjunction with the size of the characteristic of frit material and panel.Yet, can divide the experiment of shrinkage of the second sealant 30b of the first sealant 30a of A and short side part B poor according to long leg, the volume of spacer is arranged to different scopes.For example, in one exemplary embodiment, the volume of first spacer 31 is arranged to than the volume of second spacer 32 larger about 10% value.In addition, the maximum difference of considering the volume of first spacer and second spacer is about 10% or about below 10%, the content that is included in first spacer 31 among the first sealant 30a can be configured to about 0.05wt% to 2wt% of sealant content, and the content that is included in second spacer 32 among the second sealant 30b also is configured to about 0.05wt% to 2wt% of sealant content.

As mentioned above, the method for making PDP is arranged on the long leg with relatively large shrinkage with the first sealant 30a and divides among the A, and the described first sealant 30a obtains by the first relatively large spacer 31 is mixed with the material sealing agent.In addition, the second sealant 30b is arranged among the short side part B with relatively low shrinkage, the described second sealant 30b obtains by the second less relatively spacer 32 is mixed with the material sealing agent.Therefore, the height h2 that long leg divides the height h1 of the first sealant 30a of A can be substantially equal to the second sealant 30b of short side part B, thus compensate the difference of the shrinkage of the first sealant 30a and the second sealant 30b.

As mentioned above,, add spacer, and described spacer is mixed with the frit paste as liner (cushion) for the manufacturing of PDP.More particularly, the spacer that will have a varying particle size join that long leg divides and short side part in, thereby the different shrinkage that will hinder the sealant of the long leg branch of rib and/or panel and short side part is taken into account.Therefore, can prevent or significantly reduce sintered frit, utilize such as the sealant of frit with after harden and be incorporated into header board and from being formed on the find time gap that between header board 10 and back plate 20, produces the technical process of gas, space between the plate.

In another embodiment, the spacer that will have an identical particle size is arranged in second sealant of first sealant that long leg divides and short side part.Yet, for said method, because long leg divides and the difference of the shrinkage of short side part causes the height (h1) of the sealant of long leg in dividing (30a ') to be lacked than the height (h2) of the sealant in the short side part, so header board and/or back plate can be crooked, perhaps can form inconsistent distance between header board and the back plate, similarly as shown in Figure 2.Therefore, utilize the method for spacer can not prevent noise effectively with identical particle size.

Fig. 5 A is the cutaway view that plasma display is shown.Fig. 5 B is the cutaway view that PDP according to other embodiments of the present invention is shown, and Fig. 5 C is the plane graph of the PDP of Fig. 5 B.

As mentioned above, first sealant 30a during the long leg that is arranged on panel divides and the second sealant 30b that is arranged in the short side part of panel in height can be inhomogeneous in their Overlay District P, shown in Fig. 3 B.

Referring now to the rectangular panel shown in Fig. 5 A, two long legs that Overlay District P is formed on panel divide on each turning in four turnings that A and two short side part B intersect.Here, intersect around the corner by the first sealant 30a and the second sealant 30b and to form Overlay District P, so the high specific amount d of the height of the aspect ratio first sealant 30a of Overlay District P and the second sealant 30b.This inconsistent height can cause panel to produce noise.

In the process of making PDP, if when the first sealant 30a that utilizes the spacer that comprises different size and the second sealant 30b, thereby the height that can control Overlay District P equably keeps the height of the unanimity of sealant, does not then need other technology or step.Yet, in actual process, when employing has the first sealant 30a of spacer of different size and the second sealant 30b, control equably simultaneously the height of Overlay District P and reliably sealing panel be very difficult.Therefore, in the present embodiment, on the part corresponding to Overlay District P of the front or rear panel of making by substrate of glass, form groove, make that to comprise first sealant of Overlay District P and second sealant even substantially on whole height.

Specifically, in the illustrative present embodiment of reference Fig. 5 B, groove 21a is formed on the front or rear panel 21 ' of panel, makes Overlay District P have uniform height.In an embodiment shown in Fig. 5 C, groove 21a can be arranged on each turning in four turnings of panel.Can form groove 21a by the whole bag of tricks (for example grinding etc.).Groove 21a can have the different shape and the degree of depth, wherein, considers the size of the final height of sealant or area and/or Overlay District P or highly comes suitably to select the described shape and the degree of depth.

Fig. 6 A is the curve chart that illustrates according to the noise testing result of the PDP of comparative examples.Fig. 6 B is the curve chart that the noise testing result of PDP according to an illustrative embodiment of the invention is shown.

In this experiment, measure five contrast modules down and according to the noise of five modules of present embodiment at normal pressure (that is, sea level place atmospheric pressure), 1000m, 1600m, 2300m and 2800m respectively.Here, it should be noted that 1000m is defined as the air pressure at 1000 meters more than the sea level, similarly, the air pressure at other numeral above respective distance place on the sea level.

In the curve of the contrast PDP shown in Fig. 6 A, module 1, module 2, module 3, module 4 and module 5 produce the noise of about 24dB-26dB under normal pressure, under 1000m, produce the noise of about 28dB-29dB, under 1600m, produce the noise of about 32dB-36dB, under 2300m, produce the noise of about 48dB-49dB, under 2800m, produce the noise of about 52dB-55dB.

Simultaneously, in the PDP shown in Fig. 6 B according to present embodiment, module 1, module 2, module 3, module 4 and module 5 produce the noise of about 22dB-23dB under normal pressure, under 1000m, produce the noise of about 25dB-26dB, under 1600m, produce the noise of about 30dB-32dB, under 2300m, produce the noise of about 42dB-43dB, under 2800m, produce the noise of about 48dB-51dB.

In the present embodiment, the frit that can divide at the long leg of the panel of substrate of glass and the frit of short side part form groove in the zone stacked on top of each other, thereby the height that not only makes long leg divide is even substantially with the height of short side part, and makes that the height of Overlay District of long leg branch and short side part is even substantially.Therefore, can prevent effectively or reduce significantly by the noise that causes of inconsistent height between header board in the manufacture process of PDP and the back plate.

As mentioned above, by keeping constant distance between header board and the back plate, can be used for reducing the noise that causes by the gap of not expecting between header board and the back plate, thereby improved the quality of panel according to the manufacture method of the PDP of the embodiment of the invention.

Though illustrated and described embodiments of the invention, but what those skilled in the art should understand that is, without departing from the principles and spirit of the present invention, can make a change these embodiment, scope of the present invention is limited by claim and equivalent thereof.

Claims

1, a kind of plasma display comprises:

Header board and back plate, spaced apart from each other and facing each other, and between header board and back plate, have the barrier rib, header board and back plate all have long limit and minor face;

First sealant and second sealant, be used to seal the discharge space of dividing by the barrier rib between header board and back plate, wherein, first sealant is at described place, long limit and between header board and back plate, and second sealant is at described minor face place and between header board and back plate;

A plurality of first spacers are in first sealant;

A plurality of second spacers, in second sealant, the volume of each second spacer in described a plurality of second spacers is less than the volume of each first spacer in described a plurality of first spacers.

2, plasma display as claimed in claim 1, wherein, the difference of the volume of the volume of described a plurality of first spacers and described a plurality of second spacers is less than 10%.

3, plasma display as claimed in claim 1, wherein, first sealant and second sealant comprise lead-less glasses material.

4, plasma display as claimed in claim 1, wherein, the width of first sealant is greater than the width of second sealant.

5, plasma display as claimed in claim 1, wherein, the electrod-array that is used for producing at discharge space discharge is positioned on the header board and the back plate, and the phosphor layer that is used to launch the light by discharge generation is positioned at the back plate.

6, plasma display as claimed in claim 1, described plasma display also are included in the groove at least one in header board and back plate in the stacked zone of first sealant and second sealant.

7, a kind of method of making plasma display said method comprising the steps of:

By being joined, a plurality of first spacers prepare first sealant in the material sealing agent;

Prepare second sealant by a plurality of second spacers are joined in another material sealing agent, the volume of each second spacer in described a plurality of second spacers is less than the volume of each first spacer in described a plurality of first spacers;

First sealant is coated to the long limit of header board, and second sealant is coated to the minor face of header board;

Aim at header board and back plate, and header board is attached to the back plate.

8, the method for manufacturing plasma display as claimed in claim 7, wherein, the difference of the volume of each second spacer in the volume of each first spacer in described a plurality of first spacers and described a plurality of second spacer is less than 10%.

9, the method for manufacturing plasma display as claimed in claim 7, wherein, described material sealing agent comprises lead-less glasses material.

10, a kind of method of making plasma display said method comprising the steps of:

Preparation all has the header board and the back plate of long limit and minor face, and header board and back plate are spaced apart from each other and facing each other, and has the barrier rib between header board and back plate;

Form groove in the stacked zone of first sealant and second sealant in header board and back plate at least one;

First sealant is coated to the long limit of at least one in the plate of header board and back, and second sealant is coated to header board and the back minor face of at least one in the plate;

11, the method for manufacturing plasma display as claimed in claim 10, wherein, below the volume big 10% or 10% of each second spacer in described a plurality of second spacers of the volume ratio of each first spacer in described a plurality of first spacers.

12, the method for manufacturing plasma display as claimed in claim 10, wherein, first sealant and second sealant comprise lead-less glasses material.