CN206663966U

CN206663966U - Half tone

Info

Publication number: CN206663966U
Application number: CN201720225424.7U
Authority: CN
Inventors: 赵友之
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-03-09
Filing date: 2017-03-09
Publication date: 2017-11-24
Anticipated expiration: 2027-03-09

Abstract

The utility model discloses a kind of half tone, including silk screen, and the glue-line being arranged on silk screen, the glue-line include the first glue-line and the second glue-line, first grid wire casing is offered on first glue-line, second glue-line on first grid wire casing correspondence position with offering second gate wire casing.Half tone can be reduced the consuming of electrocondution slurry, be effectively improved follow-up welding procedure in the case where not influenceing any battery and assembly property in the utility model.

Description

Half tone

Technical field

Screen painting field is the utility model is related to, more particularly, it relates to a kind of half tone.

Background technology

Conventional crystalline silicon solar cell matrix is P-type silicon material, one layer of N-type impurity of its diffusion into the surface, is consequently formed PN Knot, in one layer of silicon nitride anti-reflecting film of diffusion layer surface deposition, and then prints one layer of aluminium paste in back surface, is formed after sintered Back surface field BSF.Meanwhile the secondary grid line and main gate line formed in front printing by silver paste, and formed just with sintering process Face electrode, its main function are to collect solar cell caused electric current after by illumination.Back electrode is also formed by silver paste printing And formed after sintering, work and be used for collected current.

Because argent has excellent electric conductivity, therefore, silver paste is the weight in crystal silicon solar energy battery manufacturing process Want material.Silver paste forms front main grid line, secondary grid line and the back side electricity of solar cell by silk-screen printing or other technologies Pole.Wherein it is used for the silver paste silver content of front main grid line and the printing of secondary grid line 90% or so, and is used for backplate printing Silver paste silver content is about 50-60%.Because the price of argent is higher, and fluctuation is big up and down, and upward price trend is difficult to predict, because This, the cost of crystal silicon solar energy battery is difficult to reduce, and cost price is highly dependent on the market price of argent.Work as metal The production cost of solar cell raises rapidly when silver-colored price is risen sharply, and the cost of particularly front slurry is significantly increased, from And the profitability of manufacturer has been greatly reduced, also leverage the popularization of solar power generation.

The consumption of front side silver paste is made up of main gate line and secondary grid line, during printing, print direction often perpendicular to main gate line, and Electrocondution slurry can be scraped other end by scraper from half tone one end under a certain pressure in printing process, in main gate line opening Place, its edge is due to the supporting role of emulsion, and after electrocondution slurry is deposited on silicon chip, main gate line marginal portion is higher than naturally Center section, and the part being higher by is substantially nugatory, belongs to a kind of waste of slurry；And this height fluctuating Structure, the contact area of welding and main gate line is reduced, the welding procedure after being unfavorable for when component produces.

Utility model content

For overcome the deficiencies in the prior art, the purpose of this utility model is that one kind is not influenceing any battery and component In the case of performance, the consuming of electrocondution slurry is reduced, and improves the half tone of welding procedure.

To solve the above problems, technical scheme is as follows used by the utility model：

A kind of half tone, including silk screen, and the glue-line being arranged on silk screen, the glue-line include the first glue-line and the second glue Layer, offers first grid wire casing on first glue-line, and second glue-line is with offering the on first grid wire casing correspondence position Two grid line grooves.

Preferably, the width d of the first grid wire casing is less than the width D of second gate wire casing.

Preferably, the side wall of the first grid wire casing is along grid line bearing of trend shape structure in curved surface.

Preferably, the side wall of the first grid wire casing is along grid line bearing of trend undulate, trapezoidal, side tooth profile or comb teeth shape Structure.

Preferably, the glue-line also includes intermediate gelatine layer, the intermediate gelatine layer between the first glue-line and the second glue-line, Middle grid line groove is opened up on the intermediate gelatine layer and first grid wire casing correspondence position.

Preferably, the silk screen is contained within the first glue-line.

Compared with prior art, the beneficial effects of the utility model are：

In the utility model, combined using first grid wire casing and second gate wire casing, in printing process, can effectively control silver The waste of the amount in grid line groove is starched, the grid line formed after printing is more smooth relative to centre position in marginal position, reduces The welding process of the consuming of marginal position silver paste, more conducively later stage.

Brief description of the drawings

Fig. 1 is the structural representation of half tone in the utility model；

Fig. 2 is A-A sectional views in Fig. 1；

Fig. 3 is a kind of screen structure schematic diagram in the utility model embodiment；

Fig. 4 is the compares figure of main gate line in control group and experimental group in the utility model；

Fig. 5 compares for main gate line height statistical result in control group in Fig. 4 and experimental group；

Fig. 6 compares for main gate line electrocondution slurry consumption in control group in Fig. 4 and experimental group；

Wherein, 1 it is silk screen, 2 be glue-line, 21 first glue-lines, 211 be the side wall of first grid wire casing, 22 is the second glue-line, 3 It is first grid wire casing for grid line groove, 31,32 is second gate wire casing, the width that d is the width of first grid wire casing, D is second gate wire casing Degree.

Embodiment

The utility model is described in further detail with reference to the accompanying drawings and detailed description.

As shown in Figure 1, 2, it is a kind of half tone in the utility model preferred embodiment, including silk screen 1, it is arranged on silk screen 1 Glue-line 2, and the grid line groove 3 being opened on glue-line 2, glue-line 2 include the first glue-line 21 and the second glue-line 22, the first glue-line 21 On offer first grid wire casing 31, the second glue-line 22 on the correspondence position of first grid wire casing 31 with offering second gate wire casing 32, the One grid line groove 31 and second gate wire casing 32 collectively form grid line groove 3, and the width d of first grid wire casing 31 is less than second gate wire casing 32 Width D.Because the width d of first grid wire casing 31 is less than the width D of second gate wire casing 32, therefore, in printing process, silver paste exists Amount in grid line groove 3 can be reduced effectively, and because grid line groove 3 itself is in inverted T-type structure, the grid line formed after printing is on side Edge position is more smooth relative to centre position, reduces the welding process of the consuming, more conducively later stage of marginal position silver paste.

It should be understood that the width d of first grid wire casing 31 and the width D size of second gate wire casing 32 are not unalterable , in actual production, according to the difference of silver paste concentration, the width d of first grid wire casing 31 and the width D of second gate wire casing 32 it Between size be adjustable, the two width is different, can also realize effect in the utility model.

In embodiment, as shown in figure 3, in order to improve the strike through at grid line edge, do not changing original design In the case of, width is identical with former design after keeping the printing of grid line, and scraper squeezes to half tone in slurry fluidity and printing Under pressure effect, the height at grid line edge is greatly reduced, and makes grid line cross-sectional profiles more smooth, the side wall of first grid wire casing 211 along grid line bearing of trend shape structure in curved surface.It should be understood that surface-shaped structure can be waveform, trapezoidal, side tooth profile or The structures such as comb teeth shape.

Further, glue-line 2 also includes intermediate gelatine layer, the intermediate gelatine layer be located at the first glue-line 21 and the second glue-line 22 it Between, middle grid line groove is opened up on the intermediate gelatine layer and the correspondence position of first grid wire casing 31, the width of the middle grid line groove is not Less than the width d of first grid wire casing 31, no more than the width D of second gate wire casing 32, when ensureing printing, the inlet port of silver paste is less than Grid line position.

For the ease of the making of half tone in the utility model, silk screen 1 can be contained within the first glue-line 21, be easy to the second glue From the influence of silk screen 1 when the coating and generation of layer 22.

The printing of main gate line is carried out using half tone in conventional half tone and the utility model, is designated as control group and experiment respectively Group, as shown in figure 4, using the main gate line gone out printed by conventional half tone, its brim height is about twice of center section, and is used The main gate line printed out in the utility model, the accumulation of its edge are greatly reduced, and surface is relatively more smooth, just rises and falls more conventional Method reduces a lot, and specific statistical result is as shown in Figure 5.And the consumption for the main gate line electrocondution slurry paid close attention to the most in the utility model Statistical result is measured, as shown in fig. 6, the main gate line gone out using screen painting in the utility model, the consumption in main gate line, which reduces, to be connect Nearly 20%, greatly reduce the cost of manufacture of solar cells.

The improvement of grid line groove in the utility model half tone can be applied not only to the preparation of main gate line, reduce silver paste in main grid Consuming on line, can also be applied to prepare secondary grid line, can equally play a part of reducing silver paste consuming.

In the utility model, because the width d of first grid wire casing 31 is less than the width D of second gate wire casing 32, therefore, printing During brush, amount of the silver paste in grid line groove 3 can be reduced effectively, and because grid line groove 3 itself is in inverted T-type structure, printing The grid line formed afterwards is more smooth relative to centre position in marginal position, reduces the consuming of marginal position silver paste, after being more conducive to The welding process of phase.

It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various Corresponding change and deformation, and all these changes and deformation should all belong to the protection of the utility model claims Within the scope of.

Claims

1. a kind of half tone, it is characterised in that including silk screen, and the glue-line being arranged on silk screen, the glue-line include the first glue Layer and the second glue-line, first grid wire casing, second glue-line and first grid wire casing correspondence position are offered on first glue-line On offer second gate wire casing.

2. half tone as claimed in claim 1, it is characterised in that the width d of the first grid wire casing is less than second gate wire casing Width D.

3. half tone as claimed in claim 1, it is characterised in that the side wall of the first grid wire casing is along grid line bearing of trend in song Face structure.

4. half tone as claimed in claim 3, it is characterised in that the side wall of the first grid wire casing is in ripple along grid line bearing of trend Shape wave, trapezoidal, side tooth profile or comb teeth shape structure.

5. half tone as claimed in claim 1, it is characterised in that the glue-line also includes intermediate gelatine layer, the intermediate gelatine layer position Between the first glue-line and the second glue-line, middle grid line groove is opened up on the intermediate gelatine layer and first grid wire casing correspondence position.

6. the half tone as described in claim any one of 1-5, it is characterised in that the silk screen is contained within the first glue-line.