CN201397821Y - Graphite carrier - Google Patents

Abstract

The utility model discloses a graphite carrier plate used in the coating process of the solar cell production process. Metal hooks are arranged symmetrically on the two parallel opposite surfaces inside, positioning hooks are arranged symmetrically on the other two parallel opposite surfaces in the silicon chip carrying square hole, graphite slide rails are arranged on both sides of the bottom surface of the graphite carrying plate, The lower surface of the graphite bearing plate is 0.5-1.5 mm higher than the hook top of the metal hook, and the thickness of the metal hook is 0.4-0.5 mm. The graphite support plate can significantly improve the electrical parameters and conversion efficiency of the solar cell, reduce the area of the process point, improve the appearance of the solar cell, and improve product quality.

Description

Graphite carrier

technical field

The utility model relates to an auxiliary tool used in the production process of solar cells, in particular to a graphite carrier plate.

Background technique

The solar cell production process generally includes cleaning and texturing, diffusion, etching, dephosphorous silicon glass, coating, printing electrodes, sintering and testing and sorting processes. Coating processing is carried out on the coating equipment. The silicon wafer is placed flat on the graphite carrier plate before processing, and the graphite carrier plate carries the edges of both sides of the silicon wafer through four metal hooks, and the other two sides use metal straight hooks to position the silicon wafer. The lower surface of the existing graphite carrier is 5mm higher than the top of the metal hook, and the thickness of the metal hook is 1mm. Therefore, there is a certain distance between the upper surface of the silicon wafer and the lower surface of the carrier, which will cause a certain distance between the upper surface of the silicon wafer and the lower surface of the carrier. A very thin film is formed on the edge of the back, which seriously affects the electrical parameters of the solar cell behind; and after the back of the silicon wafer is coated, there will be inherent defects of four process points (no film formation) at the four metal hooks.

Contents of the invention

The purpose of the utility model is to provide a graphite carrier plate that can significantly improve the electrical parameters and conversion efficiency of solar cells, reduce the area of process points, improve the appearance of solar cells, and improve product quality.

The utility model is realized in the following way: it has a graphite bearing plate, on which a plurality of silicon chip bearing square holes are evenly distributed, and two parallel opposite surfaces in the silicon chip bearing square holes are symmetrically provided with metal The hooks are symmetrically provided with positioning hooks on the other two parallel opposite surfaces in the silicon wafer carrying square hole, and graphite slide rails are provided on both sides of the bottom surface of the graphite carrying plate. The surface is 0.5-1.5mm higher than the hook top of the metal hook, and the thickness of the metal hook is 0.4-0.5mm.

For the above-mentioned graphite carrier plate, the lower surface of the graphite carrier plate is 1mm higher than the hook top of the metal hook.

The utility model has the advantages that the lower surface of the graphite bearing plate is 0.5-1.5mm higher than the top of the metal hook, which reduces the height of the hook, directly shortens the distance from the upper surface of the silicon wafer to the lower surface of the graphite bearing plate, and solves the problem of silicon wafer The problem of film formation on the back edge, the electrical parameters and conversion efficiency of the solar cell have been significantly improved; the thickness of the metal hook is reduced to 0.4-0.5mm, which directly reduces the area of the process point, and the appearance of the solar cell is improved. product quality.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the bottom view of Fig. 1;

Fig. 3 is a partially enlarged view of Fig. 1;

Fig. 4 is A-A sectional view of Fig. 3;

Fig. 5 is a B-B sectional view of Fig. 3 .

In the figure: graphite bearing plate 1, silicon chip bearing square hole 2, metal hook 3, positioning hook 4, graphite slide rail 5, spacer 6.

Detailed ways

As shown in the figure, the utility model has a rectangular graphite bearing plate 1 made of graphite, and a plurality of silicon wafer bearing square holes 2 matched with silicon wafers are uniformly processed on the graphite bearing plate 1. There are altogether thirty-six sheet-carrying square holes 2 in six rows and six columns, the number of which is not limited by this embodiment. Two pairs of metal hooks 3 are symmetrically fixed on two parallel opposite surfaces in each silicon chip carrying square hole 2, and are symmetrical on another pair of parallel opposite surfaces perpendicular to the above-mentioned opposite surfaces in the silicon chip carrying square hole 2. Two pairs of metal positioning hooks 4 are fixed, and the metal hooks 3 and the positioning hooks 4 are respectively divided into two types, that is, one is a single-side hook and a single-side positioning hook, and the other is a two-side hook and two-side positioning hooks. , the one-side hook and one-side positioning hook are located on the outside of the silicon wafer carrying square hole 2 around the graphite carrying plate 1 . The upper and lower surfaces of the graphite bearing plate 1 are respectively provided with pads 6 corresponding to the metal hook 3 and the positioning hook 4, so as to fix the metal hook 3 and the positioning hook 4, and graphite slide rails are arranged on both sides of the lower surface of the graphite bearing plate 1. 5. The lower surface of the graphite bearing plate 1 is higher than the hook top of the metal hook 3 by 0.5-1.5 mm, its preferred value a is 1 mm, the thickness b of the metal hook 3 is 0.4-0.5 mm, and the thickness of the metal hook 3 in this embodiment b Take 0.5mm as an example. During processing, place the silicon chip flat in the silicon chip carrying square hole 2, carry the edge positions on both sides of the silicon chip through two pairs of metal hooks 3, and position the silicon chip with positioning hooks 4 on the other two sides, and then fill the silicon chip. The graphite carrier plate of the sheet is placed on the coating equipment to be coated.

Claims (2)

1, a kind of graphite support plate, comprise the graphite loading plate, on the graphite loading plate, be evenly equipped with a plurality of silicon chip carrying square holes, be arranged with metal hanger on two parallel opposite faces in silicon chip carrying square hole, in silicon chip carrying square hole, be arranged with location hook on two parallel opposite faces in addition, be provided with graphite slideway bar in both sides, graphite loading plate bottom surface, it is characterized in that: described graphite loading plate lower surface is higher than the hook top 0.5-1.5mm of metal hanger, and the thickness of metal hanger is 0.4-0.5mm.

2, graphite support plate according to claim 1 is characterized in that: described graphite loading plate lower surface is higher than the hook top 1mm of metal hanger.

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